./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.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/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe004_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:49:06,920 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:49:07,021 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:49:07,029 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:49:07,030 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:49:07,061 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:49:07,061 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:49:07,062 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:49:07,062 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:49:07,066 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:49:07,067 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:49:07,067 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:49:07,068 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:49:07,069 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:49:07,069 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:49:07,069 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:49:07,070 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:49:07,070 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:49:07,070 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:49:07,070 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:49:07,072 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:49:07,072 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:49:07,072 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:49:07,073 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:49:07,073 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:49:07,073 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:49:07,073 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:49:07,074 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:49:07,074 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:49:07,075 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:49:07,076 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:49:07,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:49:07,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:49:07,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:49:07,076 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:49:07,077 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:49:07,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:49:07,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:49:07,077 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:49:07,077 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:49:07,078 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:49:07,078 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:49:07,078 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:49:07,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:49:07,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:49:07,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:49:07,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:49:07,371 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:49:07,371 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:49:07,372 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-20 16:49:07,582 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:49:07,582 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:49:07,583 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:49:08,633 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:49:08,877 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:49:08,878 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:49:08,891 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40f0fa77c/6efb6d02773643678663b6a7dd4adab5/FLAG977769f4b [2024-06-20 16:49:08,903 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40f0fa77c/6efb6d02773643678663b6a7dd4adab5 [2024-06-20 16:49:08,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:49:08,905 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:49:08,906 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:49:08,906 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:49:08,911 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:49:08,911 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:49:07" (1/2) ... [2024-06-20 16:49:08,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@382d0d59 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:49:08, skipping insertion in model container [2024-06-20 16:49:08,913 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:49:07" (1/2) ... [2024-06-20 16:49:08,914 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7fb9a78 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:49:08, skipping insertion in model container [2024-06-20 16:49:08,914 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:49:08" (2/2) ... [2024-06-20 16:49:08,914 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@382d0d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:08, skipping insertion in model container [2024-06-20 16:49:08,915 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:49:08" (2/2) ... [2024-06-20 16:49:08,915 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:49:08,991 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:49:08,992 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 16:49:08,992 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! 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 || ((((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 || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! 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$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 16:49:08,993 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-20 16:49:08,993 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:49:08,993 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-20 16:49:09,043 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:49:09,446 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:49:09,457 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:49:09,623 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:49:09,652 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:49:09,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09 WrapperNode [2024-06-20 16:49:09,652 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:49:09,653 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:49:09,653 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:49:09,653 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:49:09,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09" (1/1) ... [2024-06-20 16:49:09,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09" (1/1) ... [2024-06-20 16:49:09,710 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-20 16:49:09,711 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:49:09,712 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:49:09,712 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:49:09,712 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:49:09,722 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09" (1/1) ... [2024-06-20 16:49:09,722 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09" (1/1) ... [2024-06-20 16:49:09,726 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09" (1/1) ... [2024-06-20 16:49:09,747 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]. [2024-06-20 16:49:09,747 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09" (1/1) ... [2024-06-20 16:49:09,747 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09" (1/1) ... [2024-06-20 16:49:09,757 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09" (1/1) ... [2024-06-20 16:49:09,758 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09" (1/1) ... [2024-06-20 16:49:09,760 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09" (1/1) ... [2024-06-20 16:49:09,762 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09" (1/1) ... [2024-06-20 16:49:09,765 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:49:09,766 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:49:09,766 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:49:09,766 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:49:09,767 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09" (1/1) ... [2024-06-20 16:49:09,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:49:09,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:49:09,806 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) [2024-06-20 16:49:09,820 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 [2024-06-20 16:49:09,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:49:09,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:49:09,853 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:49:09,853 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:49:09,853 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:49:09,854 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:49:09,854 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:49:09,854 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:49:09,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:49:09,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:49:09,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:49:09,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:49:09,857 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:49:10,014 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:49:10,017 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:49:10,361 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:49:10,361 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:49:10,563 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:49:10,563 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:49:10,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:49:10 BoogieIcfgContainer [2024-06-20 16:49:10,564 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:49:10,566 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:49:10,566 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:49:10,569 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:49:10,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:49:07" (1/4) ... [2024-06-20 16:49:10,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22689869 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:49:10, skipping insertion in model container [2024-06-20 16:49:10,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:49:08" (2/4) ... [2024-06-20 16:49:10,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22689869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:49:10, skipping insertion in model container [2024-06-20 16:49:10,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:49:09" (3/4) ... [2024-06-20 16:49:10,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22689869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:49:10, skipping insertion in model container [2024-06-20 16:49:10,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:49:10" (4/4) ... [2024-06-20 16:49:10,572 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:49:10,588 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:49:10,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:49:10,589 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:49:10,640 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:49:10,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 16:49:10,709 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 16:49:10,709 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:49:10,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:49:10,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 16:49:10,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 16:49:10,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:49:10,735 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;@78f7f08c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:49:10,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:49:10,741 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:49:10,742 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:49:10,742 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:49:10,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:10,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:49:10,743 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)] === [2024-06-20 16:49:10,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash 368623954, now seen corresponding path program 1 times [2024-06-20 16:49:10,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:10,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830183263] [2024-06-20 16:49:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:10,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:11,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:11,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830183263] [2024-06-20 16:49:11,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830183263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:11,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:11,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:49:11,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712734095] [2024-06-20 16:49:11,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:11,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:49:11,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:11,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:49:11,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:49:11,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-20 16:49:11,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:11,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:11,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-20 16:49:11,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:12,443 INFO L124 PetriNetUnfolderBase]: 1152/1755 cut-off events. [2024-06-20 16:49:12,443 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-20 16:49:12,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 1755 events. 1152/1755 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8184 event pairs, 794 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 3583. Up to 1738 conditions per place. [2024-06-20 16:49:12,459 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 16:49:12,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 171 flow [2024-06-20 16:49:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:49:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:49:12,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-20 16:49:12,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 16:49:12,472 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-20 16:49:12,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 171 flow [2024-06-20 16:49:12,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:12,477 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 16:49:12,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-20 16:49:12,482 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 16:49:12,482 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 16:49:12,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:12,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:12,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:12,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:49:12,483 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)] === [2024-06-20 16:49:12,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2060553313, now seen corresponding path program 1 times [2024-06-20 16:49:12,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:12,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993765118] [2024-06-20 16:49:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:12,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:13,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:13,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993765118] [2024-06-20 16:49:13,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993765118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:13,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:13,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:49:13,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806524019] [2024-06-20 16:49:13,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:13,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:49:13,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:13,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:49:13,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:49:13,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:49:13,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:13,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:13,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:49:13,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:13,631 INFO L124 PetriNetUnfolderBase]: 1644/2456 cut-off events. [2024-06-20 16:49:13,631 INFO L125 PetriNetUnfolderBase]: For 375/375 co-relation queries the response was YES. [2024-06-20 16:49:13,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5637 conditions, 2456 events. 1644/2456 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11062 event pairs, 1035 based on Foata normal form. 3/2457 useless extension candidates. Maximal degree in co-relation 5625. Up to 2429 conditions per place. [2024-06-20 16:49:13,647 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 43 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-20 16:49:13,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 254 flow [2024-06-20 16:49:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:49:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:49:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-06-20 16:49:13,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-20 16:49:13,651 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 86 transitions. [2024-06-20 16:49:13,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 254 flow [2024-06-20 16:49:13,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:49:13,654 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-20 16:49:13,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-20 16:49:13,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-20 16:49:13,655 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-20 16:49:13,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:13,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:13,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:13,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:49:13,659 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)] === [2024-06-20 16:49:13,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:13,660 INFO L85 PathProgramCache]: Analyzing trace with hash -547356015, now seen corresponding path program 1 times [2024-06-20 16:49:13,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:13,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495822714] [2024-06-20 16:49:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:13,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:14,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:14,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495822714] [2024-06-20 16:49:14,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495822714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:14,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:14,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:49:14,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731859136] [2024-06-20 16:49:14,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:14,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:49:14,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:14,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:49:14,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:49:14,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:49:14,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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) [2024-06-20 16:49:14,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:14,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:49:14,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:15,003 INFO L124 PetriNetUnfolderBase]: 1632/2438 cut-off events. [2024-06-20 16:49:15,004 INFO L125 PetriNetUnfolderBase]: For 1217/1217 co-relation queries the response was YES. [2024-06-20 16:49:15,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6212 conditions, 2438 events. 1632/2438 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10956 event pairs, 743 based on Foata normal form. 6/2442 useless extension candidates. Maximal degree in co-relation 6197. Up to 2381 conditions per place. [2024-06-20 16:49:15,020 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 51 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-20 16:49:15,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 340 flow [2024-06-20 16:49:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:49:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:49:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-20 16:49:15,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-20 16:49:15,022 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 106 transitions. [2024-06-20 16:49:15,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 340 flow [2024-06-20 16:49:15,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 338 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 16:49:15,025 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 196 flow [2024-06-20 16:49:15,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-20 16:49:15,026 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-20 16:49:15,026 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 196 flow [2024-06-20 16:49:15,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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) [2024-06-20 16:49:15,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:15,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:15,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:49:15,027 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)] === [2024-06-20 16:49:15,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash -304157824, now seen corresponding path program 1 times [2024-06-20 16:49:15,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:15,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563503252] [2024-06-20 16:49:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:15,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:16,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:16,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563503252] [2024-06-20 16:49:16,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563503252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:16,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:16,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:49:16,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896983636] [2024-06-20 16:49:16,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:16,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:49:16,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:16,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:49:16,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:49:16,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:49:16,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:16,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:16,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:49:16,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:16,814 INFO L124 PetriNetUnfolderBase]: 1623/2423 cut-off events. [2024-06-20 16:49:16,815 INFO L125 PetriNetUnfolderBase]: For 2223/2223 co-relation queries the response was YES. [2024-06-20 16:49:16,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6779 conditions, 2423 events. 1623/2423 cut-off events. For 2223/2223 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10845 event pairs, 579 based on Foata normal form. 6/2427 useless extension candidates. Maximal degree in co-relation 6761. Up to 2336 conditions per place. [2024-06-20 16:49:16,831 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 55 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-20 16:49:16,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 404 flow [2024-06-20 16:49:16,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:49:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:49:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-20 16:49:16,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-06-20 16:49:16,836 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 196 flow. Second operand 6 states and 121 transitions. [2024-06-20 16:49:16,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 404 flow [2024-06-20 16:49:16,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 382 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:16,843 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 215 flow [2024-06-20 16:49:16,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=215, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-20 16:49:16,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-20 16:49:16,845 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 215 flow [2024-06-20 16:49:16,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:16,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:16,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:16,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:49:16,846 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)] === [2024-06-20 16:49:16,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:16,847 INFO L85 PathProgramCache]: Analyzing trace with hash -546325912, now seen corresponding path program 1 times [2024-06-20 16:49:16,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:16,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761828218] [2024-06-20 16:49:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:16,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:17,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:17,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761828218] [2024-06-20 16:49:17,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761828218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:17,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:17,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:49:17,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372397683] [2024-06-20 16:49:17,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:17,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:49:17,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:17,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:49:17,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:49:17,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 16:49:17,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 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) [2024-06-20 16:49:17,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:17,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 16:49:17,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:18,073 INFO L124 PetriNetUnfolderBase]: 1245/1943 cut-off events. [2024-06-20 16:49:18,074 INFO L125 PetriNetUnfolderBase]: For 2900/2936 co-relation queries the response was YES. [2024-06-20 16:49:18,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5722 conditions, 1943 events. 1245/1943 cut-off events. For 2900/2936 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9331 event pairs, 585 based on Foata normal form. 4/1878 useless extension candidates. Maximal degree in co-relation 5702. Up to 1826 conditions per place. [2024-06-20 16:49:18,094 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 43 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-20 16:49:18,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 375 flow [2024-06-20 16:49:18,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:49:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:49:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 16:49:18,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:49:18,095 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 215 flow. Second operand 5 states and 90 transitions. [2024-06-20 16:49:18,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 375 flow [2024-06-20 16:49:18,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 344 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:18,105 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 255 flow [2024-06-20 16:49:18,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-20 16:49:18,106 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-20 16:49:18,107 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 255 flow [2024-06-20 16:49:18,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 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) [2024-06-20 16:49:18,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:18,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:18,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:49:18,110 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)] === [2024-06-20 16:49:18,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:18,110 INFO L85 PathProgramCache]: Analyzing trace with hash 243767570, now seen corresponding path program 1 times [2024-06-20 16:49:18,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:18,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507368290] [2024-06-20 16:49:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:18,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:19,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:19,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507368290] [2024-06-20 16:49:19,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507368290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:19,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:19,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:49:19,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982464061] [2024-06-20 16:49:19,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:19,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:49:19,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:19,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:49:19,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:49:19,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:19,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:19,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:19,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:19,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:19,568 INFO L124 PetriNetUnfolderBase]: 1626/2431 cut-off events. [2024-06-20 16:49:19,569 INFO L125 PetriNetUnfolderBase]: For 4634/4646 co-relation queries the response was YES. [2024-06-20 16:49:19,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7866 conditions, 2431 events. 1626/2431 cut-off events. For 4634/4646 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10946 event pairs, 734 based on Foata normal form. 12/2439 useless extension candidates. Maximal degree in co-relation 7843. Up to 2346 conditions per place. [2024-06-20 16:49:19,587 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 58 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-20 16:49:19,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 515 flow [2024-06-20 16:49:19,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:49:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:49:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 16:49:19,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-20 16:49:19,590 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 255 flow. Second operand 6 states and 101 transitions. [2024-06-20 16:49:19,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 515 flow [2024-06-20 16:49:19,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 498 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:49:19,596 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 346 flow [2024-06-20 16:49:19,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2024-06-20 16:49:19,599 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-20 16:49:19,599 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 346 flow [2024-06-20 16:49:19,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:19,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:19,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:19,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:49:19,600 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)] === [2024-06-20 16:49:19,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:19,601 INFO L85 PathProgramCache]: Analyzing trace with hash 231276359, now seen corresponding path program 1 times [2024-06-20 16:49:19,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:19,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268876124] [2024-06-20 16:49:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:19,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:20,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:20,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268876124] [2024-06-20 16:49:20,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268876124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:20,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:20,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:49:20,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010803708] [2024-06-20 16:49:20,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:20,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:49:20,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:20,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:49:20,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:49:20,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:20,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:20,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:20,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:20,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:20,915 INFO L124 PetriNetUnfolderBase]: 1649/2465 cut-off events. [2024-06-20 16:49:20,916 INFO L125 PetriNetUnfolderBase]: For 6739/6739 co-relation queries the response was YES. [2024-06-20 16:49:20,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8891 conditions, 2465 events. 1649/2465 cut-off events. For 6739/6739 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11041 event pairs, 758 based on Foata normal form. 2/2465 useless extension candidates. Maximal degree in co-relation 8865. Up to 2422 conditions per place. [2024-06-20 16:49:20,939 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 69 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-20 16:49:20,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 626 flow [2024-06-20 16:49:20,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 16:49:20,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-20 16:49:20,941 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 346 flow. Second operand 7 states and 113 transitions. [2024-06-20 16:49:20,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 626 flow [2024-06-20 16:49:20,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 597 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 16:49:20,950 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 427 flow [2024-06-20 16:49:20,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-06-20 16:49:20,951 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-20 16:49:20,951 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 427 flow [2024-06-20 16:49:20,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:20,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:20,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:20,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:49:20,952 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)] === [2024-06-20 16:49:20,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:20,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1038860089, now seen corresponding path program 2 times [2024-06-20 16:49:20,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:20,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347537338] [2024-06-20 16:49:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:20,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:21,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:21,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347537338] [2024-06-20 16:49:21,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347537338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:21,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:21,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:49:21,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742613695] [2024-06-20 16:49:21,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:21,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:49:21,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:21,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:49:21,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:49:21,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:21,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 427 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:21,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:21,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:21,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:22,268 INFO L124 PetriNetUnfolderBase]: 1660/2481 cut-off events. [2024-06-20 16:49:22,269 INFO L125 PetriNetUnfolderBase]: For 8271/8271 co-relation queries the response was YES. [2024-06-20 16:49:22,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9213 conditions, 2481 events. 1660/2481 cut-off events. For 8271/8271 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11147 event pairs, 754 based on Foata normal form. 2/2481 useless extension candidates. Maximal degree in co-relation 9184. Up to 2429 conditions per place. [2024-06-20 16:49:22,286 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 17 changer transitions 0/87 dead transitions. [2024-06-20 16:49:22,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 677 flow [2024-06-20 16:49:22,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:49:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:49:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-20 16:49:22,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-20 16:49:22,287 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 427 flow. Second operand 6 states and 98 transitions. [2024-06-20 16:49:22,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 677 flow [2024-06-20 16:49:22,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 636 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:22,296 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 468 flow [2024-06-20 16:49:22,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=468, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-20 16:49:22,297 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-20 16:49:22,297 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 468 flow [2024-06-20 16:49:22,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:22,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:22,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:22,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:49:22,298 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)] === [2024-06-20 16:49:22,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:22,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1033146169, now seen corresponding path program 3 times [2024-06-20 16:49:22,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:22,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812702139] [2024-06-20 16:49:22,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:22,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:23,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:23,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812702139] [2024-06-20 16:49:23,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812702139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:23,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:23,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:49:23,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930498247] [2024-06-20 16:49:23,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:23,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:49:23,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:23,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:49:23,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:49:23,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:23,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 468 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:23,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:23,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:23,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:23,578 INFO L124 PetriNetUnfolderBase]: 1647/2464 cut-off events. [2024-06-20 16:49:23,578 INFO L125 PetriNetUnfolderBase]: For 9961/9973 co-relation queries the response was YES. [2024-06-20 16:49:23,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9376 conditions, 2464 events. 1647/2464 cut-off events. For 9961/9973 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11101 event pairs, 759 based on Foata normal form. 12/2470 useless extension candidates. Maximal degree in co-relation 9347. Up to 2355 conditions per place. [2024-06-20 16:49:23,592 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 60 selfloop transitions, 24 changer transitions 0/87 dead transitions. [2024-06-20 16:49:23,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 87 transitions, 699 flow [2024-06-20 16:49:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:49:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:49:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-20 16:49:23,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 16:49:23,594 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 468 flow. Second operand 6 states and 99 transitions. [2024-06-20 16:49:23,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 87 transitions, 699 flow [2024-06-20 16:49:23,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 87 transitions, 643 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:23,606 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 503 flow [2024-06-20 16:49:23,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=503, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-20 16:49:23,608 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-20 16:49:23,608 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 503 flow [2024-06-20 16:49:23,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:23,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:23,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:23,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:49:23,609 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)] === [2024-06-20 16:49:23,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:23,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138233, now seen corresponding path program 1 times [2024-06-20 16:49:23,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:23,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189629762] [2024-06-20 16:49:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:23,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:24,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:24,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189629762] [2024-06-20 16:49:24,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189629762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:24,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:24,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:24,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114424754] [2024-06-20 16:49:24,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:24,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:24,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:24,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:24,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:24,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 503 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:49:24,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:24,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:24,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:25,489 INFO L124 PetriNetUnfolderBase]: 1653/2473 cut-off events. [2024-06-20 16:49:25,489 INFO L125 PetriNetUnfolderBase]: For 9851/9863 co-relation queries the response was YES. [2024-06-20 16:49:25,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9455 conditions, 2473 events. 1653/2473 cut-off events. For 9851/9863 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11113 event pairs, 723 based on Foata normal form. 12/2479 useless extension candidates. Maximal degree in co-relation 9424. Up to 2346 conditions per place. [2024-06-20 16:49:25,503 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 30 changer transitions 0/95 dead transitions. [2024-06-20 16:49:25,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 95 transitions, 769 flow [2024-06-20 16:49:25,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-20 16:49:25,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-20 16:49:25,505 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 503 flow. Second operand 7 states and 114 transitions. [2024-06-20 16:49:25,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 95 transitions, 769 flow [2024-06-20 16:49:25,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 733 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:25,517 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 568 flow [2024-06-20 16:49:25,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=568, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-20 16:49:25,519 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-20 16:49:25,519 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 568 flow [2024-06-20 16:49:25,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:49:25,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:25,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:25,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:49:25,520 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)] === [2024-06-20 16:49:25,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1905986761, now seen corresponding path program 1 times [2024-06-20 16:49:25,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:25,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064982225] [2024-06-20 16:49:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:25,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:26,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:26,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064982225] [2024-06-20 16:49:26,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064982225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:26,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:26,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:26,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526003813] [2024-06-20 16:49:26,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:26,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:26,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:26,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:26,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:26,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:26,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 568 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:49:26,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:26,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:26,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:27,015 INFO L124 PetriNetUnfolderBase]: 1675/2503 cut-off events. [2024-06-20 16:49:27,016 INFO L125 PetriNetUnfolderBase]: For 12109/12109 co-relation queries the response was YES. [2024-06-20 16:49:27,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10254 conditions, 2503 events. 1675/2503 cut-off events. For 12109/12109 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11226 event pairs, 575 based on Foata normal form. 4/2505 useless extension candidates. Maximal degree in co-relation 10222. Up to 2415 conditions per place. [2024-06-20 16:49:27,033 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 85 selfloop transitions, 20 changer transitions 0/108 dead transitions. [2024-06-20 16:49:27,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 108 transitions, 888 flow [2024-06-20 16:49:27,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 16:49:27,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-20 16:49:27,036 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 568 flow. Second operand 7 states and 117 transitions. [2024-06-20 16:49:27,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 108 transitions, 888 flow [2024-06-20 16:49:27,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 108 transitions, 817 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:27,052 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 588 flow [2024-06-20 16:49:27,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-20 16:49:27,053 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-20 16:49:27,053 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 588 flow [2024-06-20 16:49:27,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:49:27,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:27,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:27,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:49:27,054 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)] === [2024-06-20 16:49:27,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:27,054 INFO L85 PathProgramCache]: Analyzing trace with hash -356135449, now seen corresponding path program 2 times [2024-06-20 16:49:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:27,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56075587] [2024-06-20 16:49:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:27,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:27,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:27,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56075587] [2024-06-20 16:49:27,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56075587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:27,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:27,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:27,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502177840] [2024-06-20 16:49:27,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:27,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:27,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:27,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:27,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:27,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:27,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:49:27,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:27,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:27,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:28,452 INFO L124 PetriNetUnfolderBase]: 1713/2558 cut-off events. [2024-06-20 16:49:28,452 INFO L125 PetriNetUnfolderBase]: For 15207/15207 co-relation queries the response was YES. [2024-06-20 16:49:28,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11138 conditions, 2558 events. 1713/2558 cut-off events. For 15207/15207 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11492 event pairs, 562 based on Foata normal form. 4/2560 useless extension candidates. Maximal degree in co-relation 11104. Up to 2418 conditions per place. [2024-06-20 16:49:28,468 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 82 selfloop transitions, 29 changer transitions 0/114 dead transitions. [2024-06-20 16:49:28,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 114 transitions, 982 flow [2024-06-20 16:49:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:49:28,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:49:28,470 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 588 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:49:28,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 114 transitions, 982 flow [2024-06-20 16:49:28,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 948 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:28,485 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 679 flow [2024-06-20 16:49:28,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=679, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-06-20 16:49:28,486 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-20 16:49:28,486 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 679 flow [2024-06-20 16:49:28,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:49:28,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:28,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:28,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:49:28,487 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)] === [2024-06-20 16:49:28,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:28,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1962758695, now seen corresponding path program 3 times [2024-06-20 16:49:28,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:28,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258532073] [2024-06-20 16:49:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:28,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:29,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:29,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258532073] [2024-06-20 16:49:29,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258532073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:29,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:29,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:29,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780494959] [2024-06-20 16:49:29,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:29,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:29,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:29,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:29,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:29,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:29,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 679 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:49:29,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:29,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:29,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:29,832 INFO L124 PetriNetUnfolderBase]: 1785/2669 cut-off events. [2024-06-20 16:49:29,832 INFO L125 PetriNetUnfolderBase]: For 19649/19658 co-relation queries the response was YES. [2024-06-20 16:49:29,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12138 conditions, 2669 events. 1785/2669 cut-off events. For 19649/19658 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12091 event pairs, 510 based on Foata normal form. 16/2676 useless extension candidates. Maximal degree in co-relation 12103. Up to 2249 conditions per place. [2024-06-20 16:49:29,850 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 81 selfloop transitions, 43 changer transitions 0/127 dead transitions. [2024-06-20 16:49:29,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 127 transitions, 1197 flow [2024-06-20 16:49:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:49:29,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-20 16:49:29,852 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 679 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:49:29,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 127 transitions, 1197 flow [2024-06-20 16:49:29,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 127 transitions, 1161 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:29,870 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 863 flow [2024-06-20 16:49:29,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=863, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-20 16:49:29,871 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-20 16:49:29,871 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 863 flow [2024-06-20 16:49:29,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-20 16:49:29,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:29,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:29,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:49:29,872 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)] === [2024-06-20 16:49:29,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:29,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1962512431, now seen corresponding path program 1 times [2024-06-20 16:49:29,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:29,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890634305] [2024-06-20 16:49:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:29,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:31,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:31,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890634305] [2024-06-20 16:49:31,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890634305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:31,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:31,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:31,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647191143] [2024-06-20 16:49:31,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:31,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:31,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:31,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:31,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:31,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 863 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:31,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:31,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:31,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:31,598 INFO L124 PetriNetUnfolderBase]: 1913/2887 cut-off events. [2024-06-20 16:49:31,598 INFO L125 PetriNetUnfolderBase]: For 25960/25969 co-relation queries the response was YES. [2024-06-20 16:49:31,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14169 conditions, 2887 events. 1913/2887 cut-off events. For 25960/25969 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13444 event pairs, 452 based on Foata normal form. 36/2914 useless extension candidates. Maximal degree in co-relation 14131. Up to 2355 conditions per place. [2024-06-20 16:49:31,618 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 92 selfloop transitions, 51 changer transitions 0/146 dead transitions. [2024-06-20 16:49:31,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 146 transitions, 1487 flow [2024-06-20 16:49:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:49:31,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-20 16:49:31,620 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 863 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:49:31,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 146 transitions, 1487 flow [2024-06-20 16:49:31,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 146 transitions, 1421 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-20 16:49:31,646 INFO L231 Difference]: Finished difference. Result has 94 places, 111 transitions, 1110 flow [2024-06-20 16:49:31,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1110, PETRI_PLACES=94, PETRI_TRANSITIONS=111} [2024-06-20 16:49:31,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-20 16:49:31,647 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 111 transitions, 1110 flow [2024-06-20 16:49:31,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:31,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:31,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:31,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:49:31,648 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)] === [2024-06-20 16:49:31,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:31,648 INFO L85 PathProgramCache]: Analyzing trace with hash -895337648, now seen corresponding path program 1 times [2024-06-20 16:49:31,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:31,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242666793] [2024-06-20 16:49:31,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:31,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:32,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:32,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242666793] [2024-06-20 16:49:32,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242666793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:32,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:32,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:32,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217430594] [2024-06-20 16:49:32,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:32,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:32,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:32,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:32,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:32,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:32,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 111 transitions, 1110 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:32,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:32,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:32,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:33,283 INFO L124 PetriNetUnfolderBase]: 1970/2969 cut-off events. [2024-06-20 16:49:33,283 INFO L125 PetriNetUnfolderBase]: For 30698/30698 co-relation queries the response was YES. [2024-06-20 16:49:33,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15848 conditions, 2969 events. 1970/2969 cut-off events. For 30698/30698 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13906 event pairs, 529 based on Foata normal form. 2/2969 useless extension candidates. Maximal degree in co-relation 15805. Up to 2853 conditions per place. [2024-06-20 16:49:33,298 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 121 selfloop transitions, 30 changer transitions 0/154 dead transitions. [2024-06-20 16:49:33,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 154 transitions, 1646 flow [2024-06-20 16:49:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:49:33,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-20 16:49:33,300 INFO L175 Difference]: Start difference. First operand has 94 places, 111 transitions, 1110 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:49:33,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 154 transitions, 1646 flow [2024-06-20 16:49:33,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 154 transitions, 1591 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-20 16:49:33,334 INFO L231 Difference]: Finished difference. Result has 101 places, 125 transitions, 1296 flow [2024-06-20 16:49:33,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1296, PETRI_PLACES=101, PETRI_TRANSITIONS=125} [2024-06-20 16:49:33,335 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-20 16:49:33,335 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 125 transitions, 1296 flow [2024-06-20 16:49:33,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:33,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:33,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:33,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:49:33,336 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:33,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:33,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1915895002, now seen corresponding path program 2 times [2024-06-20 16:49:33,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:33,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450759122] [2024-06-20 16:49:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:33,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:34,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:34,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450759122] [2024-06-20 16:49:34,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450759122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:34,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:34,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:34,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020945522] [2024-06-20 16:49:34,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:34,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:34,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:34,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:34,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:34,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:34,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 125 transitions, 1296 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:34,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:34,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:34,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:35,083 INFO L124 PetriNetUnfolderBase]: 1965/2962 cut-off events. [2024-06-20 16:49:35,083 INFO L125 PetriNetUnfolderBase]: For 33335/33335 co-relation queries the response was YES. [2024-06-20 16:49:35,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16081 conditions, 2962 events. 1965/2962 cut-off events. For 33335/33335 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13899 event pairs, 526 based on Foata normal form. 2/2962 useless extension candidates. Maximal degree in co-relation 16035. Up to 2819 conditions per place. [2024-06-20 16:49:35,106 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 114 selfloop transitions, 33 changer transitions 0/150 dead transitions. [2024-06-20 16:49:35,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 150 transitions, 1680 flow [2024-06-20 16:49:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 16:49:35,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-20 16:49:35,108 INFO L175 Difference]: Start difference. First operand has 101 places, 125 transitions, 1296 flow. Second operand 7 states and 117 transitions. [2024-06-20 16:49:35,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 150 transitions, 1680 flow [2024-06-20 16:49:35,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 150 transitions, 1625 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:35,196 INFO L231 Difference]: Finished difference. Result has 105 places, 125 transitions, 1327 flow [2024-06-20 16:49:35,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1327, PETRI_PLACES=105, PETRI_TRANSITIONS=125} [2024-06-20 16:49:35,197 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-20 16:49:35,197 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 125 transitions, 1327 flow [2024-06-20 16:49:35,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:35,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:35,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:35,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:49:35,198 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)] === [2024-06-20 16:49:35,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:35,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1915804637, now seen corresponding path program 1 times [2024-06-20 16:49:35,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:35,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145722598] [2024-06-20 16:49:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:35,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:35,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:35,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145722598] [2024-06-20 16:49:35,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145722598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:35,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:35,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:35,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432016749] [2024-06-20 16:49:35,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:35,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:35,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:35,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:35,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:35,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:35,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 125 transitions, 1327 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:35,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:35,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:35,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:36,672 INFO L124 PetriNetUnfolderBase]: 1987/2999 cut-off events. [2024-06-20 16:49:36,672 INFO L125 PetriNetUnfolderBase]: For 37832/37853 co-relation queries the response was YES. [2024-06-20 16:49:36,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16566 conditions, 2999 events. 1987/2999 cut-off events. For 37832/37853 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14124 event pairs, 530 based on Foata normal form. 18/3007 useless extension candidates. Maximal degree in co-relation 16519. Up to 2836 conditions per place. [2024-06-20 16:49:36,689 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 117 selfloop transitions, 31 changer transitions 0/151 dead transitions. [2024-06-20 16:49:36,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 151 transitions, 1743 flow [2024-06-20 16:49:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:49:36,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-20 16:49:36,691 INFO L175 Difference]: Start difference. First operand has 105 places, 125 transitions, 1327 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:49:36,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 151 transitions, 1743 flow [2024-06-20 16:49:36,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 151 transitions, 1661 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:36,727 INFO L231 Difference]: Finished difference. Result has 106 places, 128 transitions, 1360 flow [2024-06-20 16:49:36,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1360, PETRI_PLACES=106, PETRI_TRANSITIONS=128} [2024-06-20 16:49:36,727 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-20 16:49:36,728 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 128 transitions, 1360 flow [2024-06-20 16:49:36,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:36,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:36,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:36,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:49:36,729 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)] === [2024-06-20 16:49:36,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1047678861, now seen corresponding path program 2 times [2024-06-20 16:49:36,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:36,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336948552] [2024-06-20 16:49:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:36,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:37,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:37,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336948552] [2024-06-20 16:49:37,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336948552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:37,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:37,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:37,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969568111] [2024-06-20 16:49:37,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:37,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:37,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:37,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:37,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:37,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:37,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 128 transitions, 1360 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:37,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:37,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:37,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:37,991 INFO L124 PetriNetUnfolderBase]: 1999/3018 cut-off events. [2024-06-20 16:49:37,991 INFO L125 PetriNetUnfolderBase]: For 38430/38436 co-relation queries the response was YES. [2024-06-20 16:49:38,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16659 conditions, 3018 events. 1999/3018 cut-off events. For 38430/38436 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14209 event pairs, 530 based on Foata normal form. 12/3017 useless extension candidates. Maximal degree in co-relation 16611. Up to 2485 conditions per place. [2024-06-20 16:49:38,008 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 84 selfloop transitions, 70 changer transitions 0/157 dead transitions. [2024-06-20 16:49:38,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 157 transitions, 1928 flow [2024-06-20 16:49:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 16:49:38,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-20 16:49:38,010 INFO L175 Difference]: Start difference. First operand has 106 places, 128 transitions, 1360 flow. Second operand 7 states and 127 transitions. [2024-06-20 16:49:38,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 157 transitions, 1928 flow [2024-06-20 16:49:38,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 157 transitions, 1853 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:38,043 INFO L231 Difference]: Finished difference. Result has 108 places, 131 transitions, 1483 flow [2024-06-20 16:49:38,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1483, PETRI_PLACES=108, PETRI_TRANSITIONS=131} [2024-06-20 16:49:38,044 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-20 16:49:38,044 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 131 transitions, 1483 flow [2024-06-20 16:49:38,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:38,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:38,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:38,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:49:38,044 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)] === [2024-06-20 16:49:38,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:38,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1047673281, now seen corresponding path program 3 times [2024-06-20 16:49:38,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:38,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278856822] [2024-06-20 16:49:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:38,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:38,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:38,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278856822] [2024-06-20 16:49:38,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278856822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:38,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:38,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:38,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085801574] [2024-06-20 16:49:38,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:38,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:38,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:38,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:38,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:38,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:38,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 131 transitions, 1483 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:38,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:38,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:38,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:39,350 INFO L124 PetriNetUnfolderBase]: 1998/3014 cut-off events. [2024-06-20 16:49:39,350 INFO L125 PetriNetUnfolderBase]: For 42031/42037 co-relation queries the response was YES. [2024-06-20 16:49:39,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17130 conditions, 3014 events. 1998/3014 cut-off events. For 42031/42037 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14183 event pairs, 530 based on Foata normal form. 8/3009 useless extension candidates. Maximal degree in co-relation 17081. Up to 2480 conditions per place. [2024-06-20 16:49:39,368 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 87 selfloop transitions, 68 changer transitions 0/158 dead transitions. [2024-06-20 16:49:39,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 158 transitions, 1995 flow [2024-06-20 16:49:39,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:39,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:39,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 16:49:39,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-20 16:49:39,370 INFO L175 Difference]: Start difference. First operand has 108 places, 131 transitions, 1483 flow. Second operand 7 states and 123 transitions. [2024-06-20 16:49:39,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 158 transitions, 1995 flow [2024-06-20 16:49:39,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 158 transitions, 1798 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:39,408 INFO L231 Difference]: Finished difference. Result has 110 places, 134 transitions, 1483 flow [2024-06-20 16:49:39,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1483, PETRI_PLACES=110, PETRI_TRANSITIONS=134} [2024-06-20 16:49:39,408 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-20 16:49:39,409 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 134 transitions, 1483 flow [2024-06-20 16:49:39,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:39,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:39,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:39,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:49:39,409 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)] === [2024-06-20 16:49:39,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:39,410 INFO L85 PathProgramCache]: Analyzing trace with hash -708618296, now seen corresponding path program 1 times [2024-06-20 16:49:39,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:39,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941586996] [2024-06-20 16:49:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:39,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:40,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:40,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941586996] [2024-06-20 16:49:40,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941586996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:40,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:40,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:40,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841697202] [2024-06-20 16:49:40,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:40,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:40,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:40,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:40,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:40,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 1483 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:40,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:40,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:40,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:40,724 INFO L124 PetriNetUnfolderBase]: 1999/3016 cut-off events. [2024-06-20 16:49:40,724 INFO L125 PetriNetUnfolderBase]: For 44664/44670 co-relation queries the response was YES. [2024-06-20 16:49:40,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17229 conditions, 3016 events. 1999/3016 cut-off events. For 44664/44670 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14159 event pairs, 534 based on Foata normal form. 10/3013 useless extension candidates. Maximal degree in co-relation 17179. Up to 2603 conditions per place. [2024-06-20 16:49:40,740 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 100 selfloop transitions, 58 changer transitions 0/161 dead transitions. [2024-06-20 16:49:40,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 161 transitions, 1995 flow [2024-06-20 16:49:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 16:49:40,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-20 16:49:40,742 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 1483 flow. Second operand 7 states and 123 transitions. [2024-06-20 16:49:40,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 161 transitions, 1995 flow [2024-06-20 16:49:40,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 161 transitions, 1876 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:40,780 INFO L231 Difference]: Finished difference. Result has 113 places, 137 transitions, 1536 flow [2024-06-20 16:49:40,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1536, PETRI_PLACES=113, PETRI_TRANSITIONS=137} [2024-06-20 16:49:40,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-20 16:49:40,781 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 137 transitions, 1536 flow [2024-06-20 16:49:40,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:40,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:40,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:40,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:49:40,782 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)] === [2024-06-20 16:49:40,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:40,782 INFO L85 PathProgramCache]: Analyzing trace with hash -708610856, now seen corresponding path program 2 times [2024-06-20 16:49:40,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:40,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999888635] [2024-06-20 16:49:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:40,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:41,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:41,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999888635] [2024-06-20 16:49:41,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999888635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:41,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:41,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:49:41,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352031784] [2024-06-20 16:49:41,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:41,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:49:41,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:41,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:49:41,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:49:41,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:41,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 137 transitions, 1536 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:41,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:41,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:41,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:42,290 INFO L124 PetriNetUnfolderBase]: 1988/2997 cut-off events. [2024-06-20 16:49:42,290 INFO L125 PetriNetUnfolderBase]: For 47624/47639 co-relation queries the response was YES. [2024-06-20 16:49:42,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17277 conditions, 2997 events. 1988/2997 cut-off events. For 47624/47639 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14086 event pairs, 540 based on Foata normal form. 12/3003 useless extension candidates. Maximal degree in co-relation 17226. Up to 2847 conditions per place. [2024-06-20 16:49:42,309 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 125 selfloop transitions, 34 changer transitions 0/162 dead transitions. [2024-06-20 16:49:42,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 162 transitions, 1966 flow [2024-06-20 16:49:42,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 16:49:42,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:49:42,311 INFO L175 Difference]: Start difference. First operand has 113 places, 137 transitions, 1536 flow. Second operand 8 states and 128 transitions. [2024-06-20 16:49:42,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 162 transitions, 1966 flow [2024-06-20 16:49:42,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 162 transitions, 1779 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:42,355 INFO L231 Difference]: Finished difference. Result has 116 places, 139 transitions, 1463 flow [2024-06-20 16:49:42,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1463, PETRI_PLACES=116, PETRI_TRANSITIONS=139} [2024-06-20 16:49:42,356 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-20 16:49:42,356 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 139 transitions, 1463 flow [2024-06-20 16:49:42,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:42,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:42,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:42,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:49:42,356 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)] === [2024-06-20 16:49:42,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:42,357 INFO L85 PathProgramCache]: Analyzing trace with hash -173464796, now seen corresponding path program 1 times [2024-06-20 16:49:42,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:42,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124120328] [2024-06-20 16:49:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:42,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:43,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:43,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124120328] [2024-06-20 16:49:43,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124120328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:43,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:43,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:43,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901544141] [2024-06-20 16:49:43,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:43,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:43,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:43,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:43,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:43,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:43,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 139 transitions, 1463 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:43,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:43,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:43,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:43,966 INFO L124 PetriNetUnfolderBase]: 2005/3022 cut-off events. [2024-06-20 16:49:43,966 INFO L125 PetriNetUnfolderBase]: For 50820/50820 co-relation queries the response was YES. [2024-06-20 16:49:43,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17420 conditions, 3022 events. 2005/3022 cut-off events. For 50820/50820 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14178 event pairs, 375 based on Foata normal form. 4/3024 useless extension candidates. Maximal degree in co-relation 17368. Up to 2872 conditions per place. [2024-06-20 16:49:43,981 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 143 selfloop transitions, 25 changer transitions 0/171 dead transitions. [2024-06-20 16:49:43,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1933 flow [2024-06-20 16:49:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:49:43,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-20 16:49:43,984 INFO L175 Difference]: Start difference. First operand has 116 places, 139 transitions, 1463 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:49:43,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1933 flow [2024-06-20 16:49:44,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 171 transitions, 1853 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:49:44,046 INFO L231 Difference]: Finished difference. Result has 117 places, 141 transitions, 1474 flow [2024-06-20 16:49:44,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1474, PETRI_PLACES=117, PETRI_TRANSITIONS=141} [2024-06-20 16:49:44,047 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-20 16:49:44,047 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 141 transitions, 1474 flow [2024-06-20 16:49:44,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:44,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:44,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:44,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:49:44,048 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)] === [2024-06-20 16:49:44,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2057457720, now seen corresponding path program 2 times [2024-06-20 16:49:44,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:44,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353958914] [2024-06-20 16:49:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:44,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:45,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:45,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353958914] [2024-06-20 16:49:45,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353958914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:45,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:45,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:45,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079331133] [2024-06-20 16:49:45,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:45,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:45,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:45,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:45,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:45,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:45,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 141 transitions, 1474 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:45,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:45,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:45,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:45,748 INFO L124 PetriNetUnfolderBase]: 2022/3047 cut-off events. [2024-06-20 16:49:45,749 INFO L125 PetriNetUnfolderBase]: For 55729/55729 co-relation queries the response was YES. [2024-06-20 16:49:45,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17885 conditions, 3047 events. 2022/3047 cut-off events. For 55729/55729 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14354 event pairs, 490 based on Foata normal form. 4/3049 useless extension candidates. Maximal degree in co-relation 17832. Up to 2871 conditions per place. [2024-06-20 16:49:45,766 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 135 selfloop transitions, 35 changer transitions 0/173 dead transitions. [2024-06-20 16:49:45,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 173 transitions, 1954 flow [2024-06-20 16:49:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:49:45,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-20 16:49:45,768 INFO L175 Difference]: Start difference. First operand has 117 places, 141 transitions, 1474 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:49:45,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 173 transitions, 1954 flow [2024-06-20 16:49:45,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 173 transitions, 1881 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:45,815 INFO L231 Difference]: Finished difference. Result has 119 places, 143 transitions, 1519 flow [2024-06-20 16:49:45,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1519, PETRI_PLACES=119, PETRI_TRANSITIONS=143} [2024-06-20 16:49:45,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-20 16:49:45,816 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 143 transitions, 1519 flow [2024-06-20 16:49:45,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:45,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:45,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:45,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:49:45,816 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)] === [2024-06-20 16:49:45,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:45,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2054776406, now seen corresponding path program 1 times [2024-06-20 16:49:45,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:45,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822375481] [2024-06-20 16:49:45,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:45,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:46,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:46,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822375481] [2024-06-20 16:49:46,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822375481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:46,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:46,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:46,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478628701] [2024-06-20 16:49:46,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:46,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:46,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:46,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:46,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:46,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:46,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 143 transitions, 1519 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-20 16:49:46,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:46,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:46,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:47,346 INFO L124 PetriNetUnfolderBase]: 2002/3009 cut-off events. [2024-06-20 16:49:47,346 INFO L125 PetriNetUnfolderBase]: For 60625/60640 co-relation queries the response was YES. [2024-06-20 16:49:47,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17976 conditions, 3009 events. 2002/3009 cut-off events. For 60625/60640 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 14020 event pairs, 487 based on Foata normal form. 12/3015 useless extension candidates. Maximal degree in co-relation 17922. Up to 2817 conditions per place. [2024-06-20 16:49:47,362 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 126 selfloop transitions, 38 changer transitions 0/167 dead transitions. [2024-06-20 16:49:47,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 167 transitions, 1935 flow [2024-06-20 16:49:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:49:47,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-20 16:49:47,364 INFO L175 Difference]: Start difference. First operand has 119 places, 143 transitions, 1519 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:49:47,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 167 transitions, 1935 flow [2024-06-20 16:49:47,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 167 transitions, 1827 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:47,414 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 1501 flow [2024-06-20 16:49:47,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1501, PETRI_PLACES=120, PETRI_TRANSITIONS=143} [2024-06-20 16:49:47,415 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-20 16:49:47,415 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 1501 flow [2024-06-20 16:49:47,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-20 16:49:47,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:47,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:47,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:49:47,416 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)] === [2024-06-20 16:49:47,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:47,416 INFO L85 PathProgramCache]: Analyzing trace with hash -877537990, now seen corresponding path program 3 times [2024-06-20 16:49:47,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:47,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515847874] [2024-06-20 16:49:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:47,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:48,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:48,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515847874] [2024-06-20 16:49:48,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515847874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:48,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:48,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:48,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382367353] [2024-06-20 16:49:48,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:48,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:48,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:48,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:48,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:48,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 143 transitions, 1501 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:48,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:48,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:48,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:49,015 INFO L124 PetriNetUnfolderBase]: 2019/3034 cut-off events. [2024-06-20 16:49:49,015 INFO L125 PetriNetUnfolderBase]: For 65717/65717 co-relation queries the response was YES. [2024-06-20 16:49:49,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18295 conditions, 3034 events. 2019/3034 cut-off events. For 65717/65717 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14173 event pairs, 477 based on Foata normal form. 4/3036 useless extension candidates. Maximal degree in co-relation 18240. Up to 2832 conditions per place. [2024-06-20 16:49:49,034 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 129 selfloop transitions, 42 changer transitions 0/174 dead transitions. [2024-06-20 16:49:49,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 174 transitions, 1985 flow [2024-06-20 16:49:49,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:49,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:49,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 16:49:49,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-20 16:49:49,035 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 1501 flow. Second operand 8 states and 131 transitions. [2024-06-20 16:49:49,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 174 transitions, 1985 flow [2024-06-20 16:49:49,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 174 transitions, 1834 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 16:49:49,090 INFO L231 Difference]: Finished difference. Result has 121 places, 145 transitions, 1483 flow [2024-06-20 16:49:49,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1483, PETRI_PLACES=121, PETRI_TRANSITIONS=145} [2024-06-20 16:49:49,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 80 predicate places. [2024-06-20 16:49:49,091 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 145 transitions, 1483 flow [2024-06-20 16:49:49,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:49,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:49,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:49,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:49:49,092 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:49,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:49,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1286642512, now seen corresponding path program 1 times [2024-06-20 16:49:49,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:49,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099978349] [2024-06-20 16:49:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:49,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:49,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:49,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099978349] [2024-06-20 16:49:49,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099978349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:49,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:49,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:49:49,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630151906] [2024-06-20 16:49:49,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:49,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:49:49,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:49:49,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:49:49,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:49,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 145 transitions, 1483 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:49,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:49,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:49,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:50,417 INFO L124 PetriNetUnfolderBase]: 2024/3043 cut-off events. [2024-06-20 16:49:50,417 INFO L125 PetriNetUnfolderBase]: For 65335/65335 co-relation queries the response was YES. [2024-06-20 16:49:50,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18378 conditions, 3043 events. 2024/3043 cut-off events. For 65335/65335 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14274 event pairs, 491 based on Foata normal form. 1/3042 useless extension candidates. Maximal degree in co-relation 18322. Up to 2992 conditions per place. [2024-06-20 16:49:50,437 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 147 selfloop transitions, 19 changer transitions 0/169 dead transitions. [2024-06-20 16:49:50,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 169 transitions, 1979 flow [2024-06-20 16:49:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:49:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:49:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-20 16:49:50,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-20 16:49:50,439 INFO L175 Difference]: Start difference. First operand has 121 places, 145 transitions, 1483 flow. Second operand 6 states and 97 transitions. [2024-06-20 16:49:50,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 169 transitions, 1979 flow [2024-06-20 16:49:50,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 169 transitions, 1864 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:50,493 INFO L231 Difference]: Finished difference. Result has 122 places, 154 transitions, 1497 flow [2024-06-20 16:49:50,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1497, PETRI_PLACES=122, PETRI_TRANSITIONS=154} [2024-06-20 16:49:50,494 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-20 16:49:50,494 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 154 transitions, 1497 flow [2024-06-20 16:49:50,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:50,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:50,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:50,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:49:50,495 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)] === [2024-06-20 16:49:50,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:50,495 INFO L85 PathProgramCache]: Analyzing trace with hash -720414824, now seen corresponding path program 4 times [2024-06-20 16:49:50,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:50,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220053660] [2024-06-20 16:49:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:50,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:51,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:51,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220053660] [2024-06-20 16:49:51,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220053660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:51,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:51,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:51,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066832805] [2024-06-20 16:49:51,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:51,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:51,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:51,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:51,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:51,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:51,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 154 transitions, 1497 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:51,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:51,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:51,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:52,421 INFO L124 PetriNetUnfolderBase]: 2108/3185 cut-off events. [2024-06-20 16:49:52,421 INFO L125 PetriNetUnfolderBase]: For 77905/77911 co-relation queries the response was YES. [2024-06-20 16:49:52,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19193 conditions, 3185 events. 2108/3185 cut-off events. For 77905/77911 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15101 event pairs, 496 based on Foata normal form. 32/3206 useless extension candidates. Maximal degree in co-relation 19135. Up to 2504 conditions per place. [2024-06-20 16:49:52,439 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 112 selfloop transitions, 77 changer transitions 0/192 dead transitions. [2024-06-20 16:49:52,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 192 transitions, 2094 flow [2024-06-20 16:49:52,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:52,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:52,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:49:52,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 16:49:52,441 INFO L175 Difference]: Start difference. First operand has 122 places, 154 transitions, 1497 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:49:52,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 192 transitions, 2094 flow [2024-06-20 16:49:52,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 192 transitions, 2072 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-20 16:49:52,497 INFO L231 Difference]: Finished difference. Result has 131 places, 159 transitions, 1719 flow [2024-06-20 16:49:52,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1719, PETRI_PLACES=131, PETRI_TRANSITIONS=159} [2024-06-20 16:49:52,498 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-20 16:49:52,498 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 159 transitions, 1719 flow [2024-06-20 16:49:52,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:52,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:52,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:52,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:49:52,499 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)] === [2024-06-20 16:49:52,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:52,499 INFO L85 PathProgramCache]: Analyzing trace with hash -492328976, now seen corresponding path program 1 times [2024-06-20 16:49:52,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:52,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267176897] [2024-06-20 16:49:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:52,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:53,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:53,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267176897] [2024-06-20 16:49:53,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267176897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:53,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:53,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:53,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88806215] [2024-06-20 16:49:53,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:53,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:53,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:53,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:53,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:53,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:53,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 159 transitions, 1719 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-20 16:49:53,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:53,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:53,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:53,991 INFO L124 PetriNetUnfolderBase]: 2200/3339 cut-off events. [2024-06-20 16:49:53,991 INFO L125 PetriNetUnfolderBase]: For 86205/86211 co-relation queries the response was YES. [2024-06-20 16:49:54,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20823 conditions, 3339 events. 2200/3339 cut-off events. For 86205/86211 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16084 event pairs, 521 based on Foata normal form. 28/3354 useless extension candidates. Maximal degree in co-relation 20761. Up to 2790 conditions per place. [2024-06-20 16:49:54,013 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 125 selfloop transitions, 63 changer transitions 0/191 dead transitions. [2024-06-20 16:49:54,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 191 transitions, 2247 flow [2024-06-20 16:49:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:49:54,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-20 16:49:54,014 INFO L175 Difference]: Start difference. First operand has 131 places, 159 transitions, 1719 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:49:54,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 191 transitions, 2247 flow [2024-06-20 16:49:54,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 191 transitions, 2093 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:54,079 INFO L231 Difference]: Finished difference. Result has 134 places, 161 transitions, 1744 flow [2024-06-20 16:49:54,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1744, PETRI_PLACES=134, PETRI_TRANSITIONS=161} [2024-06-20 16:49:54,080 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-20 16:49:54,080 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 161 transitions, 1744 flow [2024-06-20 16:49:54,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-20 16:49:54,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:54,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:54,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:49:54,081 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:54,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:54,081 INFO L85 PathProgramCache]: Analyzing trace with hash -484054766, now seen corresponding path program 2 times [2024-06-20 16:49:54,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:54,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443935327] [2024-06-20 16:49:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:54,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:54,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:54,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443935327] [2024-06-20 16:49:54,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443935327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:54,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:54,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:54,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758655824] [2024-06-20 16:49:54,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:54,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:54,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:54,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:54,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:55,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:55,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 161 transitions, 1744 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-20 16:49:55,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:55,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:55,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:55,711 INFO L124 PetriNetUnfolderBase]: 2217/3366 cut-off events. [2024-06-20 16:49:55,711 INFO L125 PetriNetUnfolderBase]: For 85505/85511 co-relation queries the response was YES. [2024-06-20 16:49:55,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21094 conditions, 3366 events. 2217/3366 cut-off events. For 85505/85511 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16256 event pairs, 526 based on Foata normal form. 8/3361 useless extension candidates. Maximal degree in co-relation 21030. Up to 2862 conditions per place. [2024-06-20 16:49:55,734 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 116 selfloop transitions, 69 changer transitions 0/188 dead transitions. [2024-06-20 16:49:55,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 188 transitions, 2244 flow [2024-06-20 16:49:55,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:55,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:49:55,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-20 16:49:55,735 INFO L175 Difference]: Start difference. First operand has 134 places, 161 transitions, 1744 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:49:55,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 188 transitions, 2244 flow [2024-06-20 16:49:55,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 188 transitions, 2099 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:55,811 INFO L231 Difference]: Finished difference. Result has 136 places, 163 transitions, 1792 flow [2024-06-20 16:49:55,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1792, PETRI_PLACES=136, PETRI_TRANSITIONS=163} [2024-06-20 16:49:55,811 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-20 16:49:55,812 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 163 transitions, 1792 flow [2024-06-20 16:49:55,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-20 16:49:55,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:55,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:55,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:49:55,812 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)] === [2024-06-20 16:49:55,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:55,813 INFO L85 PathProgramCache]: Analyzing trace with hash -483758096, now seen corresponding path program 3 times [2024-06-20 16:49:55,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:55,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300623371] [2024-06-20 16:49:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:55,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:56,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:56,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300623371] [2024-06-20 16:49:56,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300623371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:56,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:56,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:56,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135307123] [2024-06-20 16:49:56,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:56,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:56,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:56,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:56,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:56,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:56,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 163 transitions, 1792 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-20 16:49:56,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:56,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:56,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:57,437 INFO L124 PetriNetUnfolderBase]: 2209/3354 cut-off events. [2024-06-20 16:49:57,437 INFO L125 PetriNetUnfolderBase]: For 88706/88712 co-relation queries the response was YES. [2024-06-20 16:49:57,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21077 conditions, 3354 events. 2209/3354 cut-off events. For 88706/88712 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16179 event pairs, 445 based on Foata normal form. 8/3349 useless extension candidates. Maximal degree in co-relation 21012. Up to 2533 conditions per place. [2024-06-20 16:49:57,456 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 117 selfloop transitions, 75 changer transitions 0/195 dead transitions. [2024-06-20 16:49:57,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 195 transitions, 2334 flow [2024-06-20 16:49:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:49:57,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-20 16:49:57,457 INFO L175 Difference]: Start difference. First operand has 136 places, 163 transitions, 1792 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:49:57,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 195 transitions, 2334 flow [2024-06-20 16:49:57,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 195 transitions, 2157 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:57,520 INFO L231 Difference]: Finished difference. Result has 139 places, 165 transitions, 1824 flow [2024-06-20 16:49:57,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1824, PETRI_PLACES=139, PETRI_TRANSITIONS=165} [2024-06-20 16:49:57,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-20 16:49:57,521 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 165 transitions, 1824 flow [2024-06-20 16:49:57,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-20 16:49:57,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:57,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:57,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:49:57,522 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:57,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:57,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1809648722, now seen corresponding path program 2 times [2024-06-20 16:49:57,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:57,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955646221] [2024-06-20 16:49:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:57,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:58,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:58,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955646221] [2024-06-20 16:49:58,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955646221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:58,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:58,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:49:58,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342293592] [2024-06-20 16:49:58,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:58,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:49:58,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:58,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:49:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:49:58,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:58,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 165 transitions, 1824 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:58,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:58,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:58,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:58,855 INFO L124 PetriNetUnfolderBase]: 2216/3360 cut-off events. [2024-06-20 16:49:58,855 INFO L125 PetriNetUnfolderBase]: For 93213/93213 co-relation queries the response was YES. [2024-06-20 16:49:58,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21420 conditions, 3360 events. 2216/3360 cut-off events. For 93213/93213 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16302 event pairs, 534 based on Foata normal form. 3/3361 useless extension candidates. Maximal degree in co-relation 21354. Up to 3301 conditions per place. [2024-06-20 16:49:58,877 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 156 selfloop transitions, 23 changer transitions 0/182 dead transitions. [2024-06-20 16:49:58,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 182 transitions, 2273 flow [2024-06-20 16:49:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:49:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:49:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-20 16:49:58,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-20 16:49:58,878 INFO L175 Difference]: Start difference. First operand has 139 places, 165 transitions, 1824 flow. Second operand 5 states and 89 transitions. [2024-06-20 16:49:58,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 182 transitions, 2273 flow [2024-06-20 16:49:58,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 182 transitions, 2072 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:58,960 INFO L231 Difference]: Finished difference. Result has 138 places, 168 transitions, 1731 flow [2024-06-20 16:49:58,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1731, PETRI_PLACES=138, PETRI_TRANSITIONS=168} [2024-06-20 16:49:58,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-20 16:49:58,961 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 168 transitions, 1731 flow [2024-06-20 16:49:58,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:58,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:58,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:58,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:49:58,962 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)] === [2024-06-20 16:49:58,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash -315659336, now seen corresponding path program 1 times [2024-06-20 16:49:58,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:58,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853704569] [2024-06-20 16:49:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:58,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:59,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:59,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853704569] [2024-06-20 16:49:59,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853704569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:59,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:59,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:59,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180719887] [2024-06-20 16:49:59,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:59,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:59,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:59,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:59,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:59,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:49:59,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 168 transitions, 1731 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:49:59,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:59,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:49:59,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:00,600 INFO L124 PetriNetUnfolderBase]: 2233/3389 cut-off events. [2024-06-20 16:50:00,600 INFO L125 PetriNetUnfolderBase]: For 98549/98570 co-relation queries the response was YES. [2024-06-20 16:50:00,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21599 conditions, 3389 events. 2233/3389 cut-off events. For 98549/98570 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16393 event pairs, 378 based on Foata normal form. 18/3401 useless extension candidates. Maximal degree in co-relation 21532. Up to 3214 conditions per place. [2024-06-20 16:50:00,625 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 168 selfloop transitions, 27 changer transitions 0/198 dead transitions. [2024-06-20 16:50:00,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 198 transitions, 2260 flow [2024-06-20 16:50:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 16:50:00,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:50:00,626 INFO L175 Difference]: Start difference. First operand has 138 places, 168 transitions, 1731 flow. Second operand 8 states and 128 transitions. [2024-06-20 16:50:00,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 198 transitions, 2260 flow [2024-06-20 16:50:00,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 198 transitions, 2208 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 16:50:00,697 INFO L231 Difference]: Finished difference. Result has 143 places, 170 transitions, 1786 flow [2024-06-20 16:50:00,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1786, PETRI_PLACES=143, PETRI_TRANSITIONS=170} [2024-06-20 16:50:00,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-20 16:50:00,697 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 170 transitions, 1786 flow [2024-06-20 16:50:00,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:50:00,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:00,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:00,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:50:00,698 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)] === [2024-06-20 16:50:00,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:00,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1869142046, now seen corresponding path program 2 times [2024-06-20 16:50:00,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:00,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612820679] [2024-06-20 16:50:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:00,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:01,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:01,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612820679] [2024-06-20 16:50:01,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612820679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:01,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:01,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:01,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861337440] [2024-06-20 16:50:01,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:01,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:01,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:01,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:01,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 170 transitions, 1786 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:50:01,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:01,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:01,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:02,457 INFO L124 PetriNetUnfolderBase]: 2275/3453 cut-off events. [2024-06-20 16:50:02,458 INFO L125 PetriNetUnfolderBase]: For 107712/107733 co-relation queries the response was YES. [2024-06-20 16:50:02,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22516 conditions, 3453 events. 2275/3453 cut-off events. For 107712/107733 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16847 event pairs, 493 based on Foata normal form. 18/3465 useless extension candidates. Maximal degree in co-relation 22448. Up to 3176 conditions per place. [2024-06-20 16:50:02,479 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 160 selfloop transitions, 41 changer transitions 0/204 dead transitions. [2024-06-20 16:50:02,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 204 transitions, 2499 flow [2024-06-20 16:50:02,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:02,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:50:02,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-20 16:50:02,480 INFO L175 Difference]: Start difference. First operand has 143 places, 170 transitions, 1786 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:50:02,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 204 transitions, 2499 flow [2024-06-20 16:50:02,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 204 transitions, 2410 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 16:50:02,573 INFO L231 Difference]: Finished difference. Result has 145 places, 174 transitions, 1882 flow [2024-06-20 16:50:02,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1882, PETRI_PLACES=145, PETRI_TRANSITIONS=174} [2024-06-20 16:50:02,574 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-20 16:50:02,574 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 174 transitions, 1882 flow [2024-06-20 16:50:02,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:50:02,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:02,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:02,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:50:02,574 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)] === [2024-06-20 16:50:02,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:02,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1869138326, now seen corresponding path program 3 times [2024-06-20 16:50:02,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:02,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614233900] [2024-06-20 16:50:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:02,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:03,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:03,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614233900] [2024-06-20 16:50:03,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614233900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:03,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:03,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:03,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534410862] [2024-06-20 16:50:03,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:03,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:03,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:03,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:03,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:03,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 174 transitions, 1882 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:50:03,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:03,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:03,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:04,318 INFO L124 PetriNetUnfolderBase]: 2267/3441 cut-off events. [2024-06-20 16:50:04,319 INFO L125 PetriNetUnfolderBase]: For 113535/113556 co-relation queries the response was YES. [2024-06-20 16:50:04,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22650 conditions, 3441 events. 2267/3441 cut-off events. For 113535/113556 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16762 event pairs, 491 based on Foata normal form. 18/3453 useless extension candidates. Maximal degree in co-relation 22581. Up to 3226 conditions per place. [2024-06-20 16:50:04,349 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 158 selfloop transitions, 41 changer transitions 0/202 dead transitions. [2024-06-20 16:50:04,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 202 transitions, 2381 flow [2024-06-20 16:50:04,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:50:04,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-20 16:50:04,351 INFO L175 Difference]: Start difference. First operand has 145 places, 174 transitions, 1882 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:50:04,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 202 transitions, 2381 flow [2024-06-20 16:50:04,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 202 transitions, 2257 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-20 16:50:04,481 INFO L231 Difference]: Finished difference. Result has 149 places, 174 transitions, 1848 flow [2024-06-20 16:50:04,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1848, PETRI_PLACES=149, PETRI_TRANSITIONS=174} [2024-06-20 16:50:04,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-20 16:50:04,481 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 174 transitions, 1848 flow [2024-06-20 16:50:04,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:50:04,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:04,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:04,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:50:04,482 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:04,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:04,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1605530136, now seen corresponding path program 1 times [2024-06-20 16:50:04,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:04,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561369132] [2024-06-20 16:50:04,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:04,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:05,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:05,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561369132] [2024-06-20 16:50:05,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561369132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:05,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:05,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:05,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963644604] [2024-06-20 16:50:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:05,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:05,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:05,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:05,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:05,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 174 transitions, 1848 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:05,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:05,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:05,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:05,925 INFO L124 PetriNetUnfolderBase]: 2277/3455 cut-off events. [2024-06-20 16:50:05,925 INFO L125 PetriNetUnfolderBase]: For 117551/117551 co-relation queries the response was YES. [2024-06-20 16:50:05,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22856 conditions, 3455 events. 2277/3455 cut-off events. For 117551/117551 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16875 event pairs, 494 based on Foata normal form. 2/3455 useless extension candidates. Maximal degree in co-relation 22785. Up to 3330 conditions per place. [2024-06-20 16:50:05,950 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 166 selfloop transitions, 34 changer transitions 0/203 dead transitions. [2024-06-20 16:50:05,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 203 transitions, 2449 flow [2024-06-20 16:50:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:50:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:50:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 16:50:05,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-20 16:50:05,951 INFO L175 Difference]: Start difference. First operand has 149 places, 174 transitions, 1848 flow. Second operand 7 states and 117 transitions. [2024-06-20 16:50:05,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 203 transitions, 2449 flow [2024-06-20 16:50:06,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 203 transitions, 2359 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:06,057 INFO L231 Difference]: Finished difference. Result has 149 places, 180 transitions, 1897 flow [2024-06-20 16:50:06,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1897, PETRI_PLACES=149, PETRI_TRANSITIONS=180} [2024-06-20 16:50:06,058 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-20 16:50:06,058 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 180 transitions, 1897 flow [2024-06-20 16:50:06,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:06,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:06,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:06,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:50:06,058 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)] === [2024-06-20 16:50:06,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:06,058 INFO L85 PathProgramCache]: Analyzing trace with hash 737398510, now seen corresponding path program 1 times [2024-06-20 16:50:06,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:06,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002749053] [2024-06-20 16:50:06,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:06,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:06,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:06,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002749053] [2024-06-20 16:50:06,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002749053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:06,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:06,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:06,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260690991] [2024-06-20 16:50:06,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:06,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:06,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:06,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:06,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:06,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:06,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 180 transitions, 1897 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-20 16:50:06,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:06,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:06,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:07,618 INFO L124 PetriNetUnfolderBase]: 2471/3777 cut-off events. [2024-06-20 16:50:07,618 INFO L125 PetriNetUnfolderBase]: For 149667/149673 co-relation queries the response was YES. [2024-06-20 16:50:07,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25881 conditions, 3777 events. 2471/3777 cut-off events. For 149667/149673 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19031 event pairs, 452 based on Foata normal form. 20/3784 useless extension candidates. Maximal degree in co-relation 25809. Up to 2760 conditions per place. [2024-06-20 16:50:07,649 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 135 selfloop transitions, 80 changer transitions 0/218 dead transitions. [2024-06-20 16:50:07,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 218 transitions, 2673 flow [2024-06-20 16:50:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:50:07,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-20 16:50:07,651 INFO L175 Difference]: Start difference. First operand has 149 places, 180 transitions, 1897 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:50:07,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 218 transitions, 2673 flow [2024-06-20 16:50:07,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 218 transitions, 2627 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 16:50:07,767 INFO L231 Difference]: Finished difference. Result has 154 places, 182 transitions, 2091 flow [2024-06-20 16:50:07,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1851, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2091, PETRI_PLACES=154, PETRI_TRANSITIONS=182} [2024-06-20 16:50:07,768 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-20 16:50:07,768 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 182 transitions, 2091 flow [2024-06-20 16:50:07,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-20 16:50:07,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:07,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:07,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:50:07,768 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)] === [2024-06-20 16:50:07,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash 134986856, now seen corresponding path program 2 times [2024-06-20 16:50:07,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:07,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41876360] [2024-06-20 16:50:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:07,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:08,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:08,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41876360] [2024-06-20 16:50:08,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41876360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:08,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:08,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:08,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626942566] [2024-06-20 16:50:08,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:08,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:08,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:08,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:08,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:08,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:08,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 182 transitions, 2091 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-20 16:50:08,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:08,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:08,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:09,391 INFO L124 PetriNetUnfolderBase]: 2513/3851 cut-off events. [2024-06-20 16:50:09,392 INFO L125 PetriNetUnfolderBase]: For 161618/161624 co-relation queries the response was YES. [2024-06-20 16:50:09,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26749 conditions, 3851 events. 2513/3851 cut-off events. For 161618/161624 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 19597 event pairs, 543 based on Foata normal form. 28/3866 useless extension candidates. Maximal degree in co-relation 26675. Up to 3186 conditions per place. [2024-06-20 16:50:09,420 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 132 selfloop transitions, 79 changer transitions 0/214 dead transitions. [2024-06-20 16:50:09,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 214 transitions, 2679 flow [2024-06-20 16:50:09,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:50:09,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-20 16:50:09,421 INFO L175 Difference]: Start difference. First operand has 154 places, 182 transitions, 2091 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:50:09,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 214 transitions, 2679 flow [2024-06-20 16:50:09,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 214 transitions, 2559 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 16:50:09,569 INFO L231 Difference]: Finished difference. Result has 158 places, 184 transitions, 2194 flow [2024-06-20 16:50:09,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2194, PETRI_PLACES=158, PETRI_TRANSITIONS=184} [2024-06-20 16:50:09,569 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-20 16:50:09,570 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 184 transitions, 2194 flow [2024-06-20 16:50:09,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-20 16:50:09,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:09,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:09,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:50:09,570 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)] === [2024-06-20 16:50:09,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1791579754, now seen corresponding path program 4 times [2024-06-20 16:50:09,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:09,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145329647] [2024-06-20 16:50:09,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:09,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:10,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:10,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145329647] [2024-06-20 16:50:10,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145329647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:10,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:10,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:10,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013709166] [2024-06-20 16:50:10,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:10,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:10,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:10,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:10,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:10,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:10,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 184 transitions, 2194 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:50:10,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:10,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:10,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:11,323 INFO L124 PetriNetUnfolderBase]: 2505/3839 cut-off events. [2024-06-20 16:50:11,323 INFO L125 PetriNetUnfolderBase]: For 155178/155184 co-relation queries the response was YES. [2024-06-20 16:50:11,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27002 conditions, 3839 events. 2505/3839 cut-off events. For 155178/155184 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19571 event pairs, 541 based on Foata normal form. 8/3834 useless extension candidates. Maximal degree in co-relation 26926. Up to 3294 conditions per place. [2024-06-20 16:50:11,354 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 76 changer transitions 0/212 dead transitions. [2024-06-20 16:50:11,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 212 transitions, 2758 flow [2024-06-20 16:50:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:50:11,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-20 16:50:11,355 INFO L175 Difference]: Start difference. First operand has 158 places, 184 transitions, 2194 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:50:11,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 212 transitions, 2758 flow [2024-06-20 16:50:11,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 212 transitions, 2569 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:50:11,498 INFO L231 Difference]: Finished difference. Result has 160 places, 186 transitions, 2224 flow [2024-06-20 16:50:11,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2224, PETRI_PLACES=160, PETRI_TRANSITIONS=186} [2024-06-20 16:50:11,499 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-20 16:50:11,499 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 186 transitions, 2224 flow [2024-06-20 16:50:11,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:50:11,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:11,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:11,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:50:11,500 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)] === [2024-06-20 16:50:11,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:11,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1791576034, now seen corresponding path program 5 times [2024-06-20 16:50:11,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:11,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127514184] [2024-06-20 16:50:11,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:11,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:12,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:12,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127514184] [2024-06-20 16:50:12,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127514184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:12,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:12,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:12,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153940609] [2024-06-20 16:50:12,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:12,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:12,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:12,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:12,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:12,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:12,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 186 transitions, 2224 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:50:12,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:12,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:12,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:13,173 INFO L124 PetriNetUnfolderBase]: 2497/3827 cut-off events. [2024-06-20 16:50:13,174 INFO L125 PetriNetUnfolderBase]: For 157569/157575 co-relation queries the response was YES. [2024-06-20 16:50:13,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26761 conditions, 3827 events. 2497/3827 cut-off events. For 157569/157575 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19459 event pairs, 539 based on Foata normal form. 8/3822 useless extension candidates. Maximal degree in co-relation 26684. Up to 2937 conditions per place. [2024-06-20 16:50:13,206 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 132 selfloop transitions, 83 changer transitions 0/218 dead transitions. [2024-06-20 16:50:13,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 218 transitions, 2822 flow [2024-06-20 16:50:13,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:13,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:50:13,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-20 16:50:13,208 INFO L175 Difference]: Start difference. First operand has 160 places, 186 transitions, 2224 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:50:13,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 218 transitions, 2822 flow [2024-06-20 16:50:13,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 218 transitions, 2623 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 16:50:13,357 INFO L231 Difference]: Finished difference. Result has 162 places, 188 transitions, 2259 flow [2024-06-20 16:50:13,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2259, PETRI_PLACES=162, PETRI_TRANSITIONS=188} [2024-06-20 16:50:13,357 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-20 16:50:13,358 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 188 transitions, 2259 flow [2024-06-20 16:50:13,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 16:50:13,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:13,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:13,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:50:13,358 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:13,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash 598088050, now seen corresponding path program 2 times [2024-06-20 16:50:13,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:13,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893104063] [2024-06-20 16:50:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:13,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:14,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893104063] [2024-06-20 16:50:14,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893104063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:14,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:14,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:14,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044066470] [2024-06-20 16:50:14,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:14,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:14,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:14,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:14,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:14,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:14,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 188 transitions, 2259 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:14,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:14,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:14,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:14,901 INFO L124 PetriNetUnfolderBase]: 2507/3835 cut-off events. [2024-06-20 16:50:14,901 INFO L125 PetriNetUnfolderBase]: For 163135/163135 co-relation queries the response was YES. [2024-06-20 16:50:14,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27117 conditions, 3835 events. 2507/3835 cut-off events. For 163135/163135 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19487 event pairs, 563 based on Foata normal form. 2/3835 useless extension candidates. Maximal degree in co-relation 27039. Up to 3708 conditions per place. [2024-06-20 16:50:14,931 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 171 selfloop transitions, 36 changer transitions 0/210 dead transitions. [2024-06-20 16:50:14,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 210 transitions, 2844 flow [2024-06-20 16:50:14,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:50:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:50:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 16:50:14,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-20 16:50:14,932 INFO L175 Difference]: Start difference. First operand has 162 places, 188 transitions, 2259 flow. Second operand 7 states and 113 transitions. [2024-06-20 16:50:14,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 210 transitions, 2844 flow [2024-06-20 16:50:15,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 210 transitions, 2628 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:50:15,103 INFO L231 Difference]: Finished difference. Result has 163 places, 191 transitions, 2151 flow [2024-06-20 16:50:15,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2043, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2151, PETRI_PLACES=163, PETRI_TRANSITIONS=191} [2024-06-20 16:50:15,104 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 122 predicate places. [2024-06-20 16:50:15,104 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 191 transitions, 2151 flow [2024-06-20 16:50:15,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:15,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:15,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:15,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:50:15,105 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:15,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:15,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1231211354, now seen corresponding path program 1 times [2024-06-20 16:50:15,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:15,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712130794] [2024-06-20 16:50:15,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:15,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:15,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:15,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712130794] [2024-06-20 16:50:15,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712130794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:15,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:15,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:15,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975522379] [2024-06-20 16:50:15,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:15,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:15,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:15,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:15,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:15,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:15,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 191 transitions, 2151 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:15,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:15,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:15,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:16,556 INFO L124 PetriNetUnfolderBase]: 2517/3851 cut-off events. [2024-06-20 16:50:16,556 INFO L125 PetriNetUnfolderBase]: For 168659/168659 co-relation queries the response was YES. [2024-06-20 16:50:16,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26926 conditions, 3851 events. 2517/3851 cut-off events. For 168659/168659 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19635 event pairs, 573 based on Foata normal form. 2/3851 useless extension candidates. Maximal degree in co-relation 26847. Up to 3772 conditions per place. [2024-06-20 16:50:16,588 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 181 selfloop transitions, 31 changer transitions 0/215 dead transitions. [2024-06-20 16:50:16,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 215 transitions, 2806 flow [2024-06-20 16:50:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:50:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:50:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 16:50:16,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-20 16:50:16,589 INFO L175 Difference]: Start difference. First operand has 163 places, 191 transitions, 2151 flow. Second operand 7 states and 113 transitions. [2024-06-20 16:50:16,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 215 transitions, 2806 flow [2024-06-20 16:50:16,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 215 transitions, 2742 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:50:16,749 INFO L231 Difference]: Finished difference. Result has 166 places, 197 transitions, 2253 flow [2024-06-20 16:50:16,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2253, PETRI_PLACES=166, PETRI_TRANSITIONS=197} [2024-06-20 16:50:16,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-20 16:50:16,750 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 197 transitions, 2253 flow [2024-06-20 16:50:16,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:16,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:16,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:16,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:50:16,750 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:16,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:16,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1917672400, now seen corresponding path program 3 times [2024-06-20 16:50:16,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:16,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938832495] [2024-06-20 16:50:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:16,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:17,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:17,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938832495] [2024-06-20 16:50:17,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938832495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:17,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:17,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:17,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365674562] [2024-06-20 16:50:17,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:17,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:17,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:17,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:17,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:17,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:17,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 197 transitions, 2253 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-20 16:50:17,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:17,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:17,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:18,278 INFO L124 PetriNetUnfolderBase]: 2636/4056 cut-off events. [2024-06-20 16:50:18,278 INFO L125 PetriNetUnfolderBase]: For 200026/200032 co-relation queries the response was YES. [2024-06-20 16:50:18,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28974 conditions, 4056 events. 2636/4056 cut-off events. For 200026/200032 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21061 event pairs, 577 based on Foata normal form. 20/4063 useless extension candidates. Maximal degree in co-relation 28894. Up to 3020 conditions per place. [2024-06-20 16:50:18,320 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 156 selfloop transitions, 75 changer transitions 0/234 dead transitions. [2024-06-20 16:50:18,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 234 transitions, 3075 flow [2024-06-20 16:50:18,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:50:18,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-20 16:50:18,322 INFO L175 Difference]: Start difference. First operand has 166 places, 197 transitions, 2253 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:50:18,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 234 transitions, 3075 flow [2024-06-20 16:50:18,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 234 transitions, 3016 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 16:50:18,521 INFO L231 Difference]: Finished difference. Result has 171 places, 199 transitions, 2433 flow [2024-06-20 16:50:18,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2433, PETRI_PLACES=171, PETRI_TRANSITIONS=199} [2024-06-20 16:50:18,522 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-20 16:50:18,522 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 199 transitions, 2433 flow [2024-06-20 16:50:18,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-20 16:50:18,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:18,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:18,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:50:18,522 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)] === [2024-06-20 16:50:18,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:18,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2120534916, now seen corresponding path program 4 times [2024-06-20 16:50:18,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:18,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182058619] [2024-06-20 16:50:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:18,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:19,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:19,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182058619] [2024-06-20 16:50:19,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182058619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:19,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:19,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:19,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013187817] [2024-06-20 16:50:19,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:19,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:19,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:19,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:19,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:19,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:19,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 199 transitions, 2433 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-20 16:50:19,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:19,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:19,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:20,030 INFO L124 PetriNetUnfolderBase]: 2705/4179 cut-off events. [2024-06-20 16:50:20,031 INFO L125 PetriNetUnfolderBase]: For 217944/217950 co-relation queries the response was YES. [2024-06-20 16:50:20,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30460 conditions, 4179 events. 2705/4179 cut-off events. For 217944/217950 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21929 event pairs, 543 based on Foata normal form. 20/4186 useless extension candidates. Maximal degree in co-relation 30378. Up to 2274 conditions per place. [2024-06-20 16:50:20,067 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 151 selfloop transitions, 82 changer transitions 0/236 dead transitions. [2024-06-20 16:50:20,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 236 transitions, 3265 flow [2024-06-20 16:50:20,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:20,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:50:20,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-20 16:50:20,069 INFO L175 Difference]: Start difference. First operand has 171 places, 199 transitions, 2433 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:50:20,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 236 transitions, 3265 flow [2024-06-20 16:50:20,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 236 transitions, 3149 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 16:50:20,320 INFO L231 Difference]: Finished difference. Result has 175 places, 201 transitions, 2573 flow [2024-06-20 16:50:20,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2573, PETRI_PLACES=175, PETRI_TRANSITIONS=201} [2024-06-20 16:50:20,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-20 16:50:20,321 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 201 transitions, 2573 flow [2024-06-20 16:50:20,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-20 16:50:20,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:20,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:20,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:50:20,322 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:20,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:20,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1455878106, now seen corresponding path program 3 times [2024-06-20 16:50:20,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:20,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599166850] [2024-06-20 16:50:20,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:20,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:21,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:21,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599166850] [2024-06-20 16:50:21,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599166850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:21,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:21,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:21,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247055492] [2024-06-20 16:50:21,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:21,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:21,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:21,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:21,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 201 transitions, 2573 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:21,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:21,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:21,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:21,967 INFO L124 PetriNetUnfolderBase]: 2719/4195 cut-off events. [2024-06-20 16:50:21,967 INFO L125 PetriNetUnfolderBase]: For 216128/216128 co-relation queries the response was YES. [2024-06-20 16:50:21,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30933 conditions, 4195 events. 2719/4195 cut-off events. For 216128/216128 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 22085 event pairs, 646 based on Foata normal form. 6/4199 useless extension candidates. Maximal degree in co-relation 30849. Up to 4062 conditions per place. [2024-06-20 16:50:22,005 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 183 selfloop transitions, 40 changer transitions 0/226 dead transitions. [2024-06-20 16:50:22,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 226 transitions, 3140 flow [2024-06-20 16:50:22,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:50:22,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:50:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 16:50:22,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 16:50:22,006 INFO L175 Difference]: Start difference. First operand has 175 places, 201 transitions, 2573 flow. Second operand 6 states and 110 transitions. [2024-06-20 16:50:22,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 226 transitions, 3140 flow [2024-06-20 16:50:22,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 226 transitions, 3019 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 16:50:22,243 INFO L231 Difference]: Finished difference. Result has 177 places, 204 transitions, 2601 flow [2024-06-20 16:50:22,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2601, PETRI_PLACES=177, PETRI_TRANSITIONS=204} [2024-06-20 16:50:22,244 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-20 16:50:22,244 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 204 transitions, 2601 flow [2024-06-20 16:50:22,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:22,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:22,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:22,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:50:22,245 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:22,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:22,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1353295838, now seen corresponding path program 2 times [2024-06-20 16:50:22,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:22,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089236847] [2024-06-20 16:50:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:22,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:22,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:22,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089236847] [2024-06-20 16:50:22,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089236847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:22,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:22,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:22,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567710374] [2024-06-20 16:50:22,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:22,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:22,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:22,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:22,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:22,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:22,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 204 transitions, 2601 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:22,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:22,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:22,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:23,683 INFO L124 PetriNetUnfolderBase]: 2713/4187 cut-off events. [2024-06-20 16:50:23,683 INFO L125 PetriNetUnfolderBase]: For 214999/214999 co-relation queries the response was YES. [2024-06-20 16:50:23,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31149 conditions, 4187 events. 2713/4187 cut-off events. For 214999/214999 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 22119 event pairs, 651 based on Foata normal form. 2/4187 useless extension candidates. Maximal degree in co-relation 31063. Up to 4122 conditions per place. [2024-06-20 16:50:23,719 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 191 selfloop transitions, 26 changer transitions 0/220 dead transitions. [2024-06-20 16:50:23,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 220 transitions, 3094 flow [2024-06-20 16:50:23,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:50:23,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:50:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 16:50:23,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-20 16:50:23,720 INFO L175 Difference]: Start difference. First operand has 177 places, 204 transitions, 2601 flow. Second operand 6 states and 101 transitions. [2024-06-20 16:50:23,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 220 transitions, 3094 flow [2024-06-20 16:50:23,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 220 transitions, 2993 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 16:50:23,966 INFO L231 Difference]: Finished difference. Result has 179 places, 204 transitions, 2558 flow [2024-06-20 16:50:23,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2558, PETRI_PLACES=179, PETRI_TRANSITIONS=204} [2024-06-20 16:50:23,967 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-20 16:50:23,967 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 204 transitions, 2558 flow [2024-06-20 16:50:23,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:23,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:23,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:23,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:50:23,968 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:23,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:23,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1962599474, now seen corresponding path program 1 times [2024-06-20 16:50:23,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:23,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692970723] [2024-06-20 16:50:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:23,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:24,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:24,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692970723] [2024-06-20 16:50:24,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692970723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:24,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:24,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:24,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618035391] [2024-06-20 16:50:24,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:24,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:24,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:24,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:24,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 204 transitions, 2558 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:24,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:24,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:24,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:25,353 INFO L124 PetriNetUnfolderBase]: 2731/4214 cut-off events. [2024-06-20 16:50:25,353 INFO L125 PetriNetUnfolderBase]: For 222858/222879 co-relation queries the response was YES. [2024-06-20 16:50:25,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31449 conditions, 4214 events. 2731/4214 cut-off events. For 222858/222879 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22195 event pairs, 653 based on Foata normal form. 16/4224 useless extension candidates. Maximal degree in co-relation 31362. Up to 4046 conditions per place. [2024-06-20 16:50:25,393 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 193 selfloop transitions, 40 changer transitions 0/236 dead transitions. [2024-06-20 16:50:25,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 236 transitions, 3465 flow [2024-06-20 16:50:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:50:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:50:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 16:50:25,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 16:50:25,394 INFO L175 Difference]: Start difference. First operand has 179 places, 204 transitions, 2558 flow. Second operand 7 states and 115 transitions. [2024-06-20 16:50:25,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 236 transitions, 3465 flow [2024-06-20 16:50:25,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 236 transitions, 3381 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 16:50:25,645 INFO L231 Difference]: Finished difference. Result has 182 places, 217 transitions, 2795 flow [2024-06-20 16:50:25,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2795, PETRI_PLACES=182, PETRI_TRANSITIONS=217} [2024-06-20 16:50:25,645 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-20 16:50:25,646 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 217 transitions, 2795 flow [2024-06-20 16:50:25,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:25,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:25,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:25,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:50:25,646 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:25,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:25,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1688673344, now seen corresponding path program 2 times [2024-06-20 16:50:25,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:25,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558712420] [2024-06-20 16:50:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:25,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:26,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:26,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558712420] [2024-06-20 16:50:26,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558712420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:26,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:26,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:26,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340923224] [2024-06-20 16:50:26,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:26,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:26,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:26,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:26,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:26,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:26,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 217 transitions, 2795 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:26,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:26,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:26,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:27,288 INFO L124 PetriNetUnfolderBase]: 2830/4349 cut-off events. [2024-06-20 16:50:27,288 INFO L125 PetriNetUnfolderBase]: For 245466/245466 co-relation queries the response was YES. [2024-06-20 16:50:27,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33552 conditions, 4349 events. 2830/4349 cut-off events. For 245466/245466 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22997 event pairs, 652 based on Foata normal form. 6/4353 useless extension candidates. Maximal degree in co-relation 33463. Up to 4240 conditions per place. [2024-06-20 16:50:27,330 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 219 selfloop transitions, 36 changer transitions 0/258 dead transitions. [2024-06-20 16:50:27,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 258 transitions, 3814 flow [2024-06-20 16:50:27,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:50:27,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-20 16:50:27,331 INFO L175 Difference]: Start difference. First operand has 182 places, 217 transitions, 2795 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:50:27,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 258 transitions, 3814 flow [2024-06-20 16:50:27,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 258 transitions, 3680 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-20 16:50:27,652 INFO L231 Difference]: Finished difference. Result has 189 places, 237 transitions, 3128 flow [2024-06-20 16:50:27,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2697, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3128, PETRI_PLACES=189, PETRI_TRANSITIONS=237} [2024-06-20 16:50:27,652 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-20 16:50:27,653 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 237 transitions, 3128 flow [2024-06-20 16:50:27,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:27,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:27,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:27,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:50:27,653 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:27,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:27,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1096940012, now seen corresponding path program 3 times [2024-06-20 16:50:27,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:27,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958777224] [2024-06-20 16:50:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:27,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:28,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:28,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958777224] [2024-06-20 16:50:28,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958777224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:28,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:28,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:28,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728726372] [2024-06-20 16:50:28,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:28,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:28,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:28,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:28,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:28,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 237 transitions, 3128 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:28,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:28,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:28,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:29,176 INFO L124 PetriNetUnfolderBase]: 2916/4470 cut-off events. [2024-06-20 16:50:29,176 INFO L125 PetriNetUnfolderBase]: For 261301/261301 co-relation queries the response was YES. [2024-06-20 16:50:29,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35433 conditions, 4470 events. 2916/4470 cut-off events. For 261301/261301 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23652 event pairs, 666 based on Foata normal form. 6/4474 useless extension candidates. Maximal degree in co-relation 35341. Up to 4277 conditions per place. [2024-06-20 16:50:29,215 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 223 selfloop transitions, 56 changer transitions 0/282 dead transitions. [2024-06-20 16:50:29,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 282 transitions, 4209 flow [2024-06-20 16:50:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:50:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:50:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 16:50:29,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-20 16:50:29,217 INFO L175 Difference]: Start difference. First operand has 189 places, 237 transitions, 3128 flow. Second operand 7 states and 125 transitions. [2024-06-20 16:50:29,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 282 transitions, 4209 flow [2024-06-20 16:50:29,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 282 transitions, 4047 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-20 16:50:29,558 INFO L231 Difference]: Finished difference. Result has 195 places, 257 transitions, 3521 flow [2024-06-20 16:50:29,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3521, PETRI_PLACES=195, PETRI_TRANSITIONS=257} [2024-06-20 16:50:29,558 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-20 16:50:29,558 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 257 transitions, 3521 flow [2024-06-20 16:50:29,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:29,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:29,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:29,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:50:29,559 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)] === [2024-06-20 16:50:29,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:29,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1380570878, now seen corresponding path program 1 times [2024-06-20 16:50:29,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:29,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785452077] [2024-06-20 16:50:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:29,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:30,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:30,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785452077] [2024-06-20 16:50:30,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785452077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:30,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:30,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:30,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623284879] [2024-06-20 16:50:30,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:30,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:30,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:30,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:30,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:30,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 257 transitions, 3521 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:30,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:30,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:30,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:31,661 INFO L124 PetriNetUnfolderBase]: 2911/4462 cut-off events. [2024-06-20 16:50:31,661 INFO L125 PetriNetUnfolderBase]: For 269263/269263 co-relation queries the response was YES. [2024-06-20 16:50:31,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36154 conditions, 4462 events. 2911/4462 cut-off events. For 269263/269263 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23512 event pairs, 674 based on Foata normal form. 2/4462 useless extension candidates. Maximal degree in co-relation 36058. Up to 4429 conditions per place. [2024-06-20 16:50:31,697 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 252 selfloop transitions, 13 changer transitions 0/268 dead transitions. [2024-06-20 16:50:31,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 268 transitions, 4122 flow [2024-06-20 16:50:31,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:50:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:50:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-06-20 16:50:31,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:50:31,698 INFO L175 Difference]: Start difference. First operand has 195 places, 257 transitions, 3521 flow. Second operand 5 states and 80 transitions. [2024-06-20 16:50:31,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 268 transitions, 4122 flow [2024-06-20 16:50:32,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 268 transitions, 3986 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-20 16:50:32,063 INFO L231 Difference]: Finished difference. Result has 198 places, 259 transitions, 3458 flow [2024-06-20 16:50:32,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3458, PETRI_PLACES=198, PETRI_TRANSITIONS=259} [2024-06-20 16:50:32,064 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-20 16:50:32,064 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 259 transitions, 3458 flow [2024-06-20 16:50:32,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:32,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:32,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:32,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:50:32,064 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)] === [2024-06-20 16:50:32,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:32,065 INFO L85 PathProgramCache]: Analyzing trace with hash -664173227, now seen corresponding path program 1 times [2024-06-20 16:50:32,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:32,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475703119] [2024-06-20 16:50:32,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:32,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:33,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:33,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475703119] [2024-06-20 16:50:33,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475703119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:33,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:33,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:33,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635645589] [2024-06-20 16:50:33,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:33,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:33,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:33,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:33,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:33,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:33,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 259 transitions, 3458 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:33,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:33,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:33,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:34,087 INFO L124 PetriNetUnfolderBase]: 2891/4435 cut-off events. [2024-06-20 16:50:34,087 INFO L125 PetriNetUnfolderBase]: For 276488/276494 co-relation queries the response was YES. [2024-06-20 16:50:34,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35507 conditions, 4435 events. 2891/4435 cut-off events. For 276488/276494 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23192 event pairs, 505 based on Foata normal form. 16/4438 useless extension candidates. Maximal degree in co-relation 35409. Up to 4189 conditions per place. [2024-06-20 16:50:34,132 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 258 selfloop transitions, 26 changer transitions 0/287 dead transitions. [2024-06-20 16:50:34,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 287 transitions, 4118 flow [2024-06-20 16:50:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:50:34,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-20 16:50:34,133 INFO L175 Difference]: Start difference. First operand has 198 places, 259 transitions, 3458 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:50:34,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 287 transitions, 4118 flow [2024-06-20 16:50:34,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 287 transitions, 4061 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 16:50:34,495 INFO L231 Difference]: Finished difference. Result has 203 places, 259 transitions, 3459 flow [2024-06-20 16:50:34,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3401, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3459, PETRI_PLACES=203, PETRI_TRANSITIONS=259} [2024-06-20 16:50:34,495 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-20 16:50:34,495 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 259 transitions, 3459 flow [2024-06-20 16:50:34,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:34,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:34,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:34,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:50:34,496 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)] === [2024-06-20 16:50:34,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:34,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1865648085, now seen corresponding path program 2 times [2024-06-20 16:50:34,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:34,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862279567] [2024-06-20 16:50:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:34,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:35,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:35,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862279567] [2024-06-20 16:50:35,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862279567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:35,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:35,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:35,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239020104] [2024-06-20 16:50:35,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:35,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:35,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:35,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:35,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:35,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:35,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 259 transitions, 3459 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:35,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:35,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:35,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:36,479 INFO L124 PetriNetUnfolderBase]: 2871/4403 cut-off events. [2024-06-20 16:50:36,479 INFO L125 PetriNetUnfolderBase]: For 274659/274662 co-relation queries the response was YES. [2024-06-20 16:50:36,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35050 conditions, 4403 events. 2871/4403 cut-off events. For 274659/274662 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23078 event pairs, 590 based on Foata normal form. 14/4404 useless extension candidates. Maximal degree in co-relation 34951. Up to 3743 conditions per place. [2024-06-20 16:50:36,525 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 217 selfloop transitions, 69 changer transitions 0/289 dead transitions. [2024-06-20 16:50:36,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 289 transitions, 4161 flow [2024-06-20 16:50:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:50:36,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 16:50:36,526 INFO L175 Difference]: Start difference. First operand has 203 places, 259 transitions, 3459 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:50:36,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 289 transitions, 4161 flow [2024-06-20 16:50:36,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 289 transitions, 4024 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:36,998 INFO L231 Difference]: Finished difference. Result has 205 places, 261 transitions, 3530 flow [2024-06-20 16:50:36,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3324, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3530, PETRI_PLACES=205, PETRI_TRANSITIONS=261} [2024-06-20 16:50:36,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-20 16:50:36,998 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 261 transitions, 3530 flow [2024-06-20 16:50:36,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:36,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:36,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:36,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:50:36,999 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)] === [2024-06-20 16:50:37,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:37,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1865763405, now seen corresponding path program 3 times [2024-06-20 16:50:37,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:37,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047434063] [2024-06-20 16:50:37,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:37,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:38,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:38,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047434063] [2024-06-20 16:50:38,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047434063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:38,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:38,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:38,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740101809] [2024-06-20 16:50:38,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:38,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:38,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:38,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:38,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:38,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:38,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 261 transitions, 3530 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:38,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:38,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:38,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:38,969 INFO L124 PetriNetUnfolderBase]: 2851/4371 cut-off events. [2024-06-20 16:50:38,969 INFO L125 PetriNetUnfolderBase]: For 275026/275029 co-relation queries the response was YES. [2024-06-20 16:50:38,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34418 conditions, 4371 events. 2851/4371 cut-off events. For 275026/275029 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22889 event pairs, 586 based on Foata normal form. 14/4372 useless extension candidates. Maximal degree in co-relation 34318. Up to 3844 conditions per place. [2024-06-20 16:50:39,006 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 217 selfloop transitions, 69 changer transitions 0/289 dead transitions. [2024-06-20 16:50:39,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 289 transitions, 4198 flow [2024-06-20 16:50:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 16:50:39,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-20 16:50:39,008 INFO L175 Difference]: Start difference. First operand has 205 places, 261 transitions, 3530 flow. Second operand 8 states and 134 transitions. [2024-06-20 16:50:39,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 289 transitions, 4198 flow [2024-06-20 16:50:39,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 289 transitions, 3863 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-20 16:50:39,420 INFO L231 Difference]: Finished difference. Result has 205 places, 261 transitions, 3341 flow [2024-06-20 16:50:39,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3195, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3341, PETRI_PLACES=205, PETRI_TRANSITIONS=261} [2024-06-20 16:50:39,421 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-20 16:50:39,421 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 261 transitions, 3341 flow [2024-06-20 16:50:39,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:39,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:39,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:39,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:50:39,422 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:39,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:39,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1409396634, now seen corresponding path program 1 times [2024-06-20 16:50:39,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:39,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792029806] [2024-06-20 16:50:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:39,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:40,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:40,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792029806] [2024-06-20 16:50:40,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792029806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:40,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:40,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:40,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966636780] [2024-06-20 16:50:40,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:40,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:40,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:40,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:40,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:40,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:40,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 261 transitions, 3341 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:40,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:40,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:40,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:41,225 INFO L124 PetriNetUnfolderBase]: 2871/4395 cut-off events. [2024-06-20 16:50:41,225 INFO L125 PetriNetUnfolderBase]: For 272401/272401 co-relation queries the response was YES. [2024-06-20 16:50:41,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33790 conditions, 4395 events. 2871/4395 cut-off events. For 272401/272401 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 23011 event pairs, 619 based on Foata normal form. 4/4397 useless extension candidates. Maximal degree in co-relation 33691. Up to 4175 conditions per place. [2024-06-20 16:50:41,267 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 235 selfloop transitions, 57 changer transitions 0/295 dead transitions. [2024-06-20 16:50:41,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 295 transitions, 4234 flow [2024-06-20 16:50:41,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:50:41,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:50:41,269 INFO L175 Difference]: Start difference. First operand has 205 places, 261 transitions, 3341 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:50:41,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 295 transitions, 4234 flow [2024-06-20 16:50:41,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 295 transitions, 4079 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 16:50:41,619 INFO L231 Difference]: Finished difference. Result has 207 places, 267 transitions, 3416 flow [2024-06-20 16:50:41,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3416, PETRI_PLACES=207, PETRI_TRANSITIONS=267} [2024-06-20 16:50:41,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-20 16:50:41,620 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 267 transitions, 3416 flow [2024-06-20 16:50:41,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:41,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:41,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:41,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:50:41,620 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:41,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash -710514225, now seen corresponding path program 1 times [2024-06-20 16:50:41,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:41,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116796356] [2024-06-20 16:50:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:41,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:42,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:42,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116796356] [2024-06-20 16:50:42,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116796356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:42,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:42,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:42,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360292343] [2024-06-20 16:50:42,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:42,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:42,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:42,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:42,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 267 transitions, 3416 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:42,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:42,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:42,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:43,079 INFO L124 PetriNetUnfolderBase]: 2892/4424 cut-off events. [2024-06-20 16:50:43,079 INFO L125 PetriNetUnfolderBase]: For 281872/281872 co-relation queries the response was YES. [2024-06-20 16:50:43,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34439 conditions, 4424 events. 2892/4424 cut-off events. For 281872/281872 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23194 event pairs, 621 based on Foata normal form. 1/4423 useless extension candidates. Maximal degree in co-relation 34339. Up to 4343 conditions per place. [2024-06-20 16:50:43,123 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 260 selfloop transitions, 32 changer transitions 0/295 dead transitions. [2024-06-20 16:50:43,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 295 transitions, 4352 flow [2024-06-20 16:50:43,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:50:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:50:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 16:50:43,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:50:43,124 INFO L175 Difference]: Start difference. First operand has 207 places, 267 transitions, 3416 flow. Second operand 7 states and 112 transitions. [2024-06-20 16:50:43,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 295 transitions, 4352 flow [2024-06-20 16:50:43,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 295 transitions, 4254 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 16:50:43,536 INFO L231 Difference]: Finished difference. Result has 211 places, 276 transitions, 3600 flow [2024-06-20 16:50:43,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3600, PETRI_PLACES=211, PETRI_TRANSITIONS=276} [2024-06-20 16:50:43,536 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-20 16:50:43,536 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 276 transitions, 3600 flow [2024-06-20 16:50:43,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:43,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:43,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:43,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:50:43,537 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:43,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:43,537 INFO L85 PathProgramCache]: Analyzing trace with hash 481582449, now seen corresponding path program 2 times [2024-06-20 16:50:43,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:43,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574911736] [2024-06-20 16:50:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:43,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:44,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:44,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574911736] [2024-06-20 16:50:44,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574911736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:44,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:44,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:44,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92175609] [2024-06-20 16:50:44,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:44,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:44,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:44,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:44,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:44,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:44,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 276 transitions, 3600 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:44,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:44,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:44,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:45,020 INFO L124 PetriNetUnfolderBase]: 2889/4420 cut-off events. [2024-06-20 16:50:45,020 INFO L125 PetriNetUnfolderBase]: For 290021/290021 co-relation queries the response was YES. [2024-06-20 16:50:45,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34524 conditions, 4420 events. 2889/4420 cut-off events. For 290021/290021 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23175 event pairs, 623 based on Foata normal form. 1/4419 useless extension candidates. Maximal degree in co-relation 34421. Up to 4367 conditions per place. [2024-06-20 16:50:45,064 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 266 selfloop transitions, 22 changer transitions 0/291 dead transitions. [2024-06-20 16:50:45,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 291 transitions, 4229 flow [2024-06-20 16:50:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:50:45,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:50:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-20 16:50:45,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821428571428571 [2024-06-20 16:50:45,065 INFO L175 Difference]: Start difference. First operand has 211 places, 276 transitions, 3600 flow. Second operand 7 states and 107 transitions. [2024-06-20 16:50:45,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 291 transitions, 4229 flow [2024-06-20 16:50:45,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 291 transitions, 4153 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 16:50:45,414 INFO L231 Difference]: Finished difference. Result has 215 places, 276 transitions, 3574 flow [2024-06-20 16:50:45,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3524, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3574, PETRI_PLACES=215, PETRI_TRANSITIONS=276} [2024-06-20 16:50:45,415 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-20 16:50:45,415 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 276 transitions, 3574 flow [2024-06-20 16:50:45,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:45,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:45,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:45,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:50:45,416 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:45,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:45,416 INFO L85 PathProgramCache]: Analyzing trace with hash 487143012, now seen corresponding path program 2 times [2024-06-20 16:50:45,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:45,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720896516] [2024-06-20 16:50:45,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:45,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:46,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:46,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720896516] [2024-06-20 16:50:46,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720896516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:46,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:46,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:46,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522866391] [2024-06-20 16:50:46,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:46,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:46,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:46,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:46,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:46,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:46,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 276 transitions, 3574 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:46,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:46,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:46,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:47,226 INFO L124 PetriNetUnfolderBase]: 2941/4490 cut-off events. [2024-06-20 16:50:47,226 INFO L125 PetriNetUnfolderBase]: For 310549/310549 co-relation queries the response was YES. [2024-06-20 16:50:47,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35401 conditions, 4490 events. 2941/4490 cut-off events. For 310549/310549 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23516 event pairs, 618 based on Foata normal form. 4/4492 useless extension candidates. Maximal degree in co-relation 35296. Up to 4240 conditions per place. [2024-06-20 16:50:47,270 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 246 selfloop transitions, 59 changer transitions 0/308 dead transitions. [2024-06-20 16:50:47,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 308 transitions, 4591 flow [2024-06-20 16:50:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:50:47,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-20 16:50:47,271 INFO L175 Difference]: Start difference. First operand has 215 places, 276 transitions, 3574 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:50:47,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 308 transitions, 4591 flow [2024-06-20 16:50:47,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 308 transitions, 4513 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 16:50:47,718 INFO L231 Difference]: Finished difference. Result has 218 places, 282 transitions, 3716 flow [2024-06-20 16:50:47,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3716, PETRI_PLACES=218, PETRI_TRANSITIONS=282} [2024-06-20 16:50:47,718 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-20 16:50:47,718 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 282 transitions, 3716 flow [2024-06-20 16:50:47,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:47,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:47,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:47,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:50:47,719 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)] === [2024-06-20 16:50:47,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:47,719 INFO L85 PathProgramCache]: Analyzing trace with hash 487154172, now seen corresponding path program 3 times [2024-06-20 16:50:47,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:47,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693083032] [2024-06-20 16:50:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:47,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:48,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:48,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693083032] [2024-06-20 16:50:48,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693083032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:48,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:48,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:50:48,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895781136] [2024-06-20 16:50:48,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:48,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:50:48,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:48,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:50:48,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:50:48,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:48,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 282 transitions, 3716 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:48,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:48,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:48,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:49,603 INFO L124 PetriNetUnfolderBase]: 2929/4474 cut-off events. [2024-06-20 16:50:49,603 INFO L125 PetriNetUnfolderBase]: For 315632/315632 co-relation queries the response was YES. [2024-06-20 16:50:49,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35415 conditions, 4474 events. 2929/4474 cut-off events. For 315632/315632 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23433 event pairs, 616 based on Foata normal form. 4/4476 useless extension candidates. Maximal degree in co-relation 35309. Up to 4232 conditions per place. [2024-06-20 16:50:49,639 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 243 selfloop transitions, 60 changer transitions 0/306 dead transitions. [2024-06-20 16:50:49,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 306 transitions, 4521 flow [2024-06-20 16:50:49,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:49,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:50:49,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 16:50:49,644 INFO L175 Difference]: Start difference. First operand has 218 places, 282 transitions, 3716 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:50:49,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 306 transitions, 4521 flow [2024-06-20 16:50:50,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 306 transitions, 4380 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-20 16:50:50,156 INFO L231 Difference]: Finished difference. Result has 222 places, 282 transitions, 3701 flow [2024-06-20 16:50:50,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3701, PETRI_PLACES=222, PETRI_TRANSITIONS=282} [2024-06-20 16:50:50,156 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-20 16:50:50,156 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 282 transitions, 3701 flow [2024-06-20 16:50:50,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:50,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:50,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:50,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:50:50,157 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)] === [2024-06-20 16:50:50,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:50,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1677542543, now seen corresponding path program 3 times [2024-06-20 16:50:50,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:50,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175946368] [2024-06-20 16:50:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:50,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:50,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:50,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175946368] [2024-06-20 16:50:50,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175946368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:50,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:50,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:50,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117670951] [2024-06-20 16:50:50,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:50,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:50,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:50,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:50,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:50,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 282 transitions, 3701 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:50,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:50,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:50,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:51,792 INFO L124 PetriNetUnfolderBase]: 2931/4481 cut-off events. [2024-06-20 16:50:51,792 INFO L125 PetriNetUnfolderBase]: For 322402/322426 co-relation queries the response was YES. [2024-06-20 16:50:51,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35434 conditions, 4481 events. 2931/4481 cut-off events. For 322402/322426 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23499 event pairs, 636 based on Foata normal form. 18/4493 useless extension candidates. Maximal degree in co-relation 35327. Up to 4281 conditions per place. [2024-06-20 16:50:51,843 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 239 selfloop transitions, 65 changer transitions 0/307 dead transitions. [2024-06-20 16:50:51,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 307 transitions, 4689 flow [2024-06-20 16:50:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:50:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:50:51,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 16:50:51,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 16:50:51,845 INFO L175 Difference]: Start difference. First operand has 222 places, 282 transitions, 3701 flow. Second operand 7 states and 115 transitions. [2024-06-20 16:50:51,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 307 transitions, 4689 flow [2024-06-20 16:50:52,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 307 transitions, 4561 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:52,413 INFO L231 Difference]: Finished difference. Result has 223 places, 289 transitions, 3852 flow [2024-06-20 16:50:52,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3852, PETRI_PLACES=223, PETRI_TRANSITIONS=289} [2024-06-20 16:50:52,414 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 182 predicate places. [2024-06-20 16:50:52,414 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 289 transitions, 3852 flow [2024-06-20 16:50:52,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:52,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:52,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:52,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:50:52,414 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:52,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:52,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1688970383, now seen corresponding path program 4 times [2024-06-20 16:50:52,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:52,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034657477] [2024-06-20 16:50:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:52,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:53,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:53,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034657477] [2024-06-20 16:50:53,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034657477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:53,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:53,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:53,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555110264] [2024-06-20 16:50:53,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:53,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:53,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:53,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:53,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:53,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:53,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 289 transitions, 3852 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:53,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:53,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:53,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:54,150 INFO L124 PetriNetUnfolderBase]: 2907/4445 cut-off events. [2024-06-20 16:50:54,150 INFO L125 PetriNetUnfolderBase]: For 328643/328643 co-relation queries the response was YES. [2024-06-20 16:50:54,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35162 conditions, 4445 events. 2907/4445 cut-off events. For 328643/328643 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23336 event pairs, 620 based on Foata normal form. 6/4449 useless extension candidates. Maximal degree in co-relation 35053. Up to 4344 conditions per place. [2024-06-20 16:50:54,195 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 264 selfloop transitions, 40 changer transitions 0/307 dead transitions. [2024-06-20 16:50:54,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 307 transitions, 4533 flow [2024-06-20 16:50:54,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:50:54,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:50:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 16:50:54,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-20 16:50:54,196 INFO L175 Difference]: Start difference. First operand has 223 places, 289 transitions, 3852 flow. Second operand 8 states and 126 transitions. [2024-06-20 16:50:54,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 307 transitions, 4533 flow [2024-06-20 16:50:54,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 307 transitions, 4297 flow, removed 87 selfloop flow, removed 3 redundant places. [2024-06-20 16:50:54,826 INFO L231 Difference]: Finished difference. Result has 228 places, 289 transitions, 3710 flow [2024-06-20 16:50:54,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3616, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3710, PETRI_PLACES=228, PETRI_TRANSITIONS=289} [2024-06-20 16:50:54,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 187 predicate places. [2024-06-20 16:50:54,827 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 289 transitions, 3710 flow [2024-06-20 16:50:54,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:54,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:54,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:54,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:50:54,828 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)] === [2024-06-20 16:50:54,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:54,828 INFO L85 PathProgramCache]: Analyzing trace with hash 997494931, now seen corresponding path program 5 times [2024-06-20 16:50:54,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:54,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442954287] [2024-06-20 16:50:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:54,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:55,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:55,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442954287] [2024-06-20 16:50:55,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442954287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:55,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:55,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:55,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936944855] [2024-06-20 16:50:55,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:55,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:55,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:55,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:55,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 289 transitions, 3710 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:55,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:55,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:55,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:56,380 INFO L124 PetriNetUnfolderBase]: 2914/4456 cut-off events. [2024-06-20 16:50:56,380 INFO L125 PetriNetUnfolderBase]: For 331387/331387 co-relation queries the response was YES. [2024-06-20 16:50:56,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35073 conditions, 4456 events. 2914/4456 cut-off events. For 331387/331387 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23379 event pairs, 629 based on Foata normal form. 3/4457 useless extension candidates. Maximal degree in co-relation 34963. Up to 4378 conditions per place. [2024-06-20 16:50:56,425 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 274 selfloop transitions, 33 changer transitions 0/310 dead transitions. [2024-06-20 16:50:56,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 310 transitions, 4459 flow [2024-06-20 16:50:56,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:50:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:50:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 16:50:56,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 16:50:56,426 INFO L175 Difference]: Start difference. First operand has 228 places, 289 transitions, 3710 flow. Second operand 6 states and 104 transitions. [2024-06-20 16:50:56,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 310 transitions, 4459 flow [2024-06-20 16:50:56,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 310 transitions, 4351 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:56,991 INFO L231 Difference]: Finished difference. Result has 227 places, 292 transitions, 3758 flow [2024-06-20 16:50:56,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3758, PETRI_PLACES=227, PETRI_TRANSITIONS=292} [2024-06-20 16:50:56,992 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-20 16:50:56,992 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 292 transitions, 3758 flow [2024-06-20 16:50:56,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:56,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:56,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:56,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:50:56,993 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)] === [2024-06-20 16:50:56,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:56,993 INFO L85 PathProgramCache]: Analyzing trace with hash 144334321, now seen corresponding path program 6 times [2024-06-20 16:50:56,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:56,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543324289] [2024-06-20 16:50:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:56,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:57,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:57,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543324289] [2024-06-20 16:50:57,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543324289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:57,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:57,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:50:57,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444295408] [2024-06-20 16:50:57,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:57,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:50:57,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:57,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:50:57,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:50:57,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:50:57,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 292 transitions, 3758 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:57,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:57,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:50:57,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:58,619 INFO L124 PetriNetUnfolderBase]: 2890/4423 cut-off events. [2024-06-20 16:50:58,619 INFO L125 PetriNetUnfolderBase]: For 337000/337000 co-relation queries the response was YES. [2024-06-20 16:50:58,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34624 conditions, 4423 events. 2890/4423 cut-off events. For 337000/337000 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23197 event pairs, 624 based on Foata normal form. 6/4427 useless extension candidates. Maximal degree in co-relation 34513. Up to 4231 conditions per place. [2024-06-20 16:50:58,663 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 254 selfloop transitions, 59 changer transitions 0/316 dead transitions. [2024-06-20 16:50:58,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 316 transitions, 4480 flow [2024-06-20 16:50:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:50:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:50:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:50:58,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-20 16:50:58,665 INFO L175 Difference]: Start difference. First operand has 227 places, 292 transitions, 3758 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:50:58,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 316 transitions, 4480 flow [2024-06-20 16:50:59,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 316 transitions, 4306 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-20 16:50:59,067 INFO L231 Difference]: Finished difference. Result has 231 places, 293 transitions, 3767 flow [2024-06-20 16:50:59,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3767, PETRI_PLACES=231, PETRI_TRANSITIONS=293} [2024-06-20 16:50:59,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-20 16:50:59,068 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 293 transitions, 3767 flow [2024-06-20 16:50:59,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-06-20 16:50:59,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:59,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:59,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:50:59,068 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)] === [2024-06-20 16:50:59,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:59,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1059114043, now seen corresponding path program 4 times [2024-06-20 16:50:59,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:59,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687018880] [2024-06-20 16:50:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:59,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:00,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:00,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687018880] [2024-06-20 16:51:00,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687018880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:00,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:00,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:00,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125351674] [2024-06-20 16:51:00,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:00,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:00,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:00,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:00,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:00,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:00,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 293 transitions, 3767 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:00,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:00,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:00,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:01,410 INFO L124 PetriNetUnfolderBase]: 2870/4394 cut-off events. [2024-06-20 16:51:01,410 INFO L125 PetriNetUnfolderBase]: For 337320/337323 co-relation queries the response was YES. [2024-06-20 16:51:01,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34088 conditions, 4394 events. 2870/4394 cut-off events. For 337320/337323 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22987 event pairs, 583 based on Foata normal form. 14/4396 useless extension candidates. Maximal degree in co-relation 33975. Up to 3911 conditions per place. [2024-06-20 16:51:01,458 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 258 selfloop transitions, 62 changer transitions 0/323 dead transitions. [2024-06-20 16:51:01,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 323 transitions, 4486 flow [2024-06-20 16:51:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:51:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:51:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 16:51:01,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-20 16:51:01,460 INFO L175 Difference]: Start difference. First operand has 231 places, 293 transitions, 3767 flow. Second operand 9 states and 145 transitions. [2024-06-20 16:51:01,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 323 transitions, 4486 flow [2024-06-20 16:51:01,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 323 transitions, 4348 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:51:01,967 INFO L231 Difference]: Finished difference. Result has 233 places, 292 transitions, 3681 flow [2024-06-20 16:51:01,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3553, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3681, PETRI_PLACES=233, PETRI_TRANSITIONS=292} [2024-06-20 16:51:01,968 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-20 16:51:01,968 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 292 transitions, 3681 flow [2024-06-20 16:51:01,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:01,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:01,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:01,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:51:01,968 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:01,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:01,968 INFO L85 PathProgramCache]: Analyzing trace with hash -389317242, now seen corresponding path program 4 times [2024-06-20 16:51:01,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:01,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462206968] [2024-06-20 16:51:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:01,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:02,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:02,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462206968] [2024-06-20 16:51:02,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462206968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:02,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:02,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:02,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136006065] [2024-06-20 16:51:02,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:02,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:02,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:02,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:02,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:02,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:02,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 292 transitions, 3681 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:02,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:02,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:02,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:03,673 INFO L124 PetriNetUnfolderBase]: 2890/4419 cut-off events. [2024-06-20 16:51:03,673 INFO L125 PetriNetUnfolderBase]: For 297608/297608 co-relation queries the response was YES. [2024-06-20 16:51:03,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33517 conditions, 4419 events. 2890/4419 cut-off events. For 297608/297608 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23147 event pairs, 601 based on Foata normal form. 4/4421 useless extension candidates. Maximal degree in co-relation 33405. Up to 4240 conditions per place. [2024-06-20 16:51:03,718 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 268 selfloop transitions, 50 changer transitions 0/321 dead transitions. [2024-06-20 16:51:03,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 321 transitions, 4579 flow [2024-06-20 16:51:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:51:03,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:51:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 16:51:03,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-20 16:51:03,720 INFO L175 Difference]: Start difference. First operand has 233 places, 292 transitions, 3681 flow. Second operand 7 states and 123 transitions. [2024-06-20 16:51:03,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 321 transitions, 4579 flow [2024-06-20 16:51:04,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 321 transitions, 4399 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 16:51:04,223 INFO L231 Difference]: Finished difference. Result has 232 places, 295 transitions, 3658 flow [2024-06-20 16:51:04,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3658, PETRI_PLACES=232, PETRI_TRANSITIONS=295} [2024-06-20 16:51:04,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-20 16:51:04,224 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 295 transitions, 3658 flow [2024-06-20 16:51:04,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:04,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:04,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:04,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:51:04,224 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:04,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:04,225 INFO L85 PathProgramCache]: Analyzing trace with hash -893359236, now seen corresponding path program 5 times [2024-06-20 16:51:04,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:04,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46058625] [2024-06-20 16:51:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:04,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:04,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:04,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46058625] [2024-06-20 16:51:04,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46058625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:04,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:04,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:04,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560237817] [2024-06-20 16:51:04,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:04,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:04,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:04,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:04,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:05,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:05,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 295 transitions, 3658 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:05,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:05,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:05,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:06,008 INFO L124 PetriNetUnfolderBase]: 2878/4401 cut-off events. [2024-06-20 16:51:06,008 INFO L125 PetriNetUnfolderBase]: For 299288/299288 co-relation queries the response was YES. [2024-06-20 16:51:06,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33088 conditions, 4401 events. 2878/4401 cut-off events. For 299288/299288 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22996 event pairs, 596 based on Foata normal form. 4/4403 useless extension candidates. Maximal degree in co-relation 32975. Up to 4232 conditions per place. [2024-06-20 16:51:06,047 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 267 selfloop transitions, 46 changer transitions 0/316 dead transitions. [2024-06-20 16:51:06,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 316 transitions, 4367 flow [2024-06-20 16:51:06,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:51:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:51:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 16:51:06,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-20 16:51:06,048 INFO L175 Difference]: Start difference. First operand has 232 places, 295 transitions, 3658 flow. Second operand 7 states and 117 transitions. [2024-06-20 16:51:06,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 316 transitions, 4367 flow [2024-06-20 16:51:06,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 316 transitions, 4173 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 16:51:06,480 INFO L231 Difference]: Finished difference. Result has 233 places, 295 transitions, 3562 flow [2024-06-20 16:51:06,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3562, PETRI_PLACES=233, PETRI_TRANSITIONS=295} [2024-06-20 16:51:06,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-20 16:51:06,480 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 295 transitions, 3562 flow [2024-06-20 16:51:06,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:06,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:06,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:06,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:51:06,481 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:06,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:06,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1685255529, now seen corresponding path program 1 times [2024-06-20 16:51:06,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:06,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529119443] [2024-06-20 16:51:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:06,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:07,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:07,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529119443] [2024-06-20 16:51:07,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529119443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:07,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:07,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:07,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912897735] [2024-06-20 16:51:07,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:07,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:07,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:07,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:07,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:07,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:07,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 295 transitions, 3562 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:07,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:07,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:07,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:08,398 INFO L124 PetriNetUnfolderBase]: 2896/4430 cut-off events. [2024-06-20 16:51:08,399 INFO L125 PetriNetUnfolderBase]: For 306491/306515 co-relation queries the response was YES. [2024-06-20 16:51:08,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33318 conditions, 4430 events. 2896/4430 cut-off events. For 306491/306515 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 23207 event pairs, 616 based on Foata normal form. 18/4442 useless extension candidates. Maximal degree in co-relation 33204. Up to 4195 conditions per place. [2024-06-20 16:51:08,437 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 242 selfloop transitions, 82 changer transitions 0/327 dead transitions. [2024-06-20 16:51:08,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 327 transitions, 4759 flow [2024-06-20 16:51:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:51:08,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:51:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 16:51:08,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-20 16:51:08,441 INFO L175 Difference]: Start difference. First operand has 233 places, 295 transitions, 3562 flow. Second operand 9 states and 143 transitions. [2024-06-20 16:51:08,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 327 transitions, 4759 flow [2024-06-20 16:51:08,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 327 transitions, 4627 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 16:51:08,990 INFO L231 Difference]: Finished difference. Result has 236 places, 303 transitions, 3730 flow [2024-06-20 16:51:08,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3430, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3730, PETRI_PLACES=236, PETRI_TRANSITIONS=303} [2024-06-20 16:51:08,991 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-20 16:51:08,991 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 303 transitions, 3730 flow [2024-06-20 16:51:08,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:08,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:08,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:08,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:51:08,991 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:08,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:08,992 INFO L85 PathProgramCache]: Analyzing trace with hash 711042404, now seen corresponding path program 1 times [2024-06-20 16:51:08,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:08,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079707686] [2024-06-20 16:51:08,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:08,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:09,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:09,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079707686] [2024-06-20 16:51:09,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079707686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:09,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:09,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:09,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829029988] [2024-06-20 16:51:09,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:09,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:09,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:09,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:09,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:09,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:09,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 303 transitions, 3730 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:09,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:09,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:09,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:10,690 INFO L124 PetriNetUnfolderBase]: 2956/4513 cut-off events. [2024-06-20 16:51:10,691 INFO L125 PetriNetUnfolderBase]: For 330725/330749 co-relation queries the response was YES. [2024-06-20 16:51:10,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35099 conditions, 4513 events. 2956/4513 cut-off events. For 330725/330749 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 23673 event pairs, 603 based on Foata normal form. 20/4527 useless extension candidates. Maximal degree in co-relation 34984. Up to 4117 conditions per place. [2024-06-20 16:51:10,738 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 237 selfloop transitions, 102 changer transitions 0/342 dead transitions. [2024-06-20 16:51:10,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 342 transitions, 5045 flow [2024-06-20 16:51:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:10,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:51:10,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 16:51:10,740 INFO L175 Difference]: Start difference. First operand has 236 places, 303 transitions, 3730 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:51:10,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 342 transitions, 5045 flow [2024-06-20 16:51:11,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 342 transitions, 4877 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 16:51:11,363 INFO L231 Difference]: Finished difference. Result has 241 places, 320 transitions, 4198 flow [2024-06-20 16:51:11,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4198, PETRI_PLACES=241, PETRI_TRANSITIONS=320} [2024-06-20 16:51:11,363 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-20 16:51:11,363 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 320 transitions, 4198 flow [2024-06-20 16:51:11,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:11,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:11,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:11,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:51:11,364 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)] === [2024-06-20 16:51:11,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:11,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1688978474, now seen corresponding path program 2 times [2024-06-20 16:51:11,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:11,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445316543] [2024-06-20 16:51:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:11,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:12,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:12,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445316543] [2024-06-20 16:51:12,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445316543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:12,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:12,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:12,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354376510] [2024-06-20 16:51:12,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:12,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:12,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:12,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:12,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:12,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:12,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 320 transitions, 4198 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:12,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:12,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:12,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:13,191 INFO L124 PetriNetUnfolderBase]: 3024/4604 cut-off events. [2024-06-20 16:51:13,191 INFO L125 PetriNetUnfolderBase]: For 359308/359308 co-relation queries the response was YES. [2024-06-20 16:51:13,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37734 conditions, 4604 events. 3024/4604 cut-off events. For 359308/359308 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 24183 event pairs, 600 based on Foata normal form. 4/4606 useless extension candidates. Maximal degree in co-relation 37615. Up to 4456 conditions per place. [2024-06-20 16:51:13,242 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 299 selfloop transitions, 51 changer transitions 0/353 dead transitions. [2024-06-20 16:51:13,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 353 transitions, 5526 flow [2024-06-20 16:51:13,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:51:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:51:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 16:51:13,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 16:51:13,243 INFO L175 Difference]: Start difference. First operand has 241 places, 320 transitions, 4198 flow. Second operand 9 states and 140 transitions. [2024-06-20 16:51:13,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 353 transitions, 5526 flow [2024-06-20 16:51:13,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 353 transitions, 5355 flow, removed 82 selfloop flow, removed 2 redundant places. [2024-06-20 16:51:13,917 INFO L231 Difference]: Finished difference. Result has 249 places, 331 transitions, 4461 flow [2024-06-20 16:51:13,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4063, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4461, PETRI_PLACES=249, PETRI_TRANSITIONS=331} [2024-06-20 16:51:13,917 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-20 16:51:13,917 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 331 transitions, 4461 flow [2024-06-20 16:51:13,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:13,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:13,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:13,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:51:13,918 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:13,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:13,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1688978319, now seen corresponding path program 2 times [2024-06-20 16:51:13,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:13,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372624501] [2024-06-20 16:51:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:13,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:14,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:14,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372624501] [2024-06-20 16:51:14,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372624501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:14,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:14,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:14,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405424213] [2024-06-20 16:51:14,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:14,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:14,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:14,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:14,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:14,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:14,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 331 transitions, 4461 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:14,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:14,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:14,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:16,025 INFO L124 PetriNetUnfolderBase]: 3240/4904 cut-off events. [2024-06-20 16:51:16,026 INFO L125 PetriNetUnfolderBase]: For 413131/413131 co-relation queries the response was YES. [2024-06-20 16:51:16,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40245 conditions, 4904 events. 3240/4904 cut-off events. For 413131/413131 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 25784 event pairs, 613 based on Foata normal form. 12/4914 useless extension candidates. Maximal degree in co-relation 40122. Up to 4618 conditions per place. [2024-06-20 16:51:16,079 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 315 selfloop transitions, 61 changer transitions 0/379 dead transitions. [2024-06-20 16:51:16,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 379 transitions, 6044 flow [2024-06-20 16:51:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:51:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:51:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:51:16,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-20 16:51:16,080 INFO L175 Difference]: Start difference. First operand has 249 places, 331 transitions, 4461 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:51:16,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 379 transitions, 6044 flow [2024-06-20 16:51:16,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 379 transitions, 5912 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-20 16:51:16,836 INFO L231 Difference]: Finished difference. Result has 254 places, 353 transitions, 4846 flow [2024-06-20 16:51:16,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4329, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4846, PETRI_PLACES=254, PETRI_TRANSITIONS=353} [2024-06-20 16:51:16,837 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-20 16:51:16,837 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 353 transitions, 4846 flow [2024-06-20 16:51:16,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:16,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:16,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:16,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:51:16,837 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:16,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash 151966769, now seen corresponding path program 1 times [2024-06-20 16:51:16,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:16,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862103487] [2024-06-20 16:51:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:16,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:17,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:17,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862103487] [2024-06-20 16:51:17,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862103487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:17,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:17,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:17,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049046161] [2024-06-20 16:51:17,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:17,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:17,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:17,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:17,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:17,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 353 transitions, 4846 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:17,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:17,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:17,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:18,662 INFO L124 PetriNetUnfolderBase]: 3237/4900 cut-off events. [2024-06-20 16:51:18,662 INFO L125 PetriNetUnfolderBase]: For 406015/406015 co-relation queries the response was YES. [2024-06-20 16:51:18,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41219 conditions, 4900 events. 3237/4900 cut-off events. For 406015/406015 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25743 event pairs, 636 based on Foata normal form. 1/4899 useless extension candidates. Maximal degree in co-relation 41094. Up to 4837 conditions per place. [2024-06-20 16:51:18,720 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 333 selfloop transitions, 29 changer transitions 0/365 dead transitions. [2024-06-20 16:51:18,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 365 transitions, 5621 flow [2024-06-20 16:51:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:51:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:51:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-20 16:51:18,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:51:18,721 INFO L175 Difference]: Start difference. First operand has 254 places, 353 transitions, 4846 flow. Second operand 5 states and 85 transitions. [2024-06-20 16:51:18,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 365 transitions, 5621 flow [2024-06-20 16:51:19,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 365 transitions, 5411 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-06-20 16:51:19,710 INFO L231 Difference]: Finished difference. Result has 256 places, 353 transitions, 4718 flow [2024-06-20 16:51:19,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4636, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4718, PETRI_PLACES=256, PETRI_TRANSITIONS=353} [2024-06-20 16:51:19,710 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-20 16:51:19,710 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 353 transitions, 4718 flow [2024-06-20 16:51:19,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:19,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:19,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:19,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:51:19,711 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:19,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:19,711 INFO L85 PathProgramCache]: Analyzing trace with hash 354598695, now seen corresponding path program 3 times [2024-06-20 16:51:19,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:19,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100832372] [2024-06-20 16:51:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:19,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:20,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:20,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100832372] [2024-06-20 16:51:20,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100832372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:20,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:20,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:20,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295346873] [2024-06-20 16:51:20,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:20,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:20,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:20,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:20,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:20,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:20,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 353 transitions, 4718 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:20,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:20,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:20,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:21,876 INFO L124 PetriNetUnfolderBase]: 3473/5227 cut-off events. [2024-06-20 16:51:21,876 INFO L125 PetriNetUnfolderBase]: For 476799/476799 co-relation queries the response was YES. [2024-06-20 16:51:21,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44728 conditions, 5227 events. 3473/5227 cut-off events. For 476799/476799 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27492 event pairs, 655 based on Foata normal form. 12/5237 useless extension candidates. Maximal degree in co-relation 44601. Up to 4444 conditions per place. [2024-06-20 16:51:21,937 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 277 selfloop transitions, 129 changer transitions 0/409 dead transitions. [2024-06-20 16:51:21,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 409 transitions, 6325 flow [2024-06-20 16:51:21,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:21,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:51:21,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-20 16:51:21,939 INFO L175 Difference]: Start difference. First operand has 256 places, 353 transitions, 4718 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:51:21,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 409 transitions, 6325 flow [2024-06-20 16:51:22,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 409 transitions, 6267 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:51:22,987 INFO L231 Difference]: Finished difference. Result has 261 places, 372 transitions, 5375 flow [2024-06-20 16:51:22,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4660, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5375, PETRI_PLACES=261, PETRI_TRANSITIONS=372} [2024-06-20 16:51:22,988 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-20 16:51:22,988 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 372 transitions, 5375 flow [2024-06-20 16:51:22,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:22,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:22,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:22,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:51:22,988 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:22,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:22,989 INFO L85 PathProgramCache]: Analyzing trace with hash 144347992, now seen corresponding path program 3 times [2024-06-20 16:51:22,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:22,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675703303] [2024-06-20 16:51:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:22,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:23,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:23,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675703303] [2024-06-20 16:51:23,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675703303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:23,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:23,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:23,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624900328] [2024-06-20 16:51:23,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:23,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:23,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:23,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:23,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:23,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:23,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 372 transitions, 5375 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:23,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:23,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:23,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:24,976 INFO L124 PetriNetUnfolderBase]: 3529/5306 cut-off events. [2024-06-20 16:51:24,976 INFO L125 PetriNetUnfolderBase]: For 494452/494452 co-relation queries the response was YES. [2024-06-20 16:51:25,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47878 conditions, 5306 events. 3529/5306 cut-off events. For 494452/494452 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27964 event pairs, 661 based on Foata normal form. 4/5308 useless extension candidates. Maximal degree in co-relation 47749. Up to 5176 conditions per place. [2024-06-20 16:51:25,034 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 354 selfloop transitions, 42 changer transitions 0/399 dead transitions. [2024-06-20 16:51:25,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 399 transitions, 6583 flow [2024-06-20 16:51:25,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 16:51:25,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-20 16:51:25,036 INFO L175 Difference]: Start difference. First operand has 261 places, 372 transitions, 5375 flow. Second operand 8 states and 123 transitions. [2024-06-20 16:51:25,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 399 transitions, 6583 flow [2024-06-20 16:51:26,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 399 transitions, 6383 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-20 16:51:26,016 INFO L231 Difference]: Finished difference. Result has 266 places, 380 transitions, 5508 flow [2024-06-20 16:51:26,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5177, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5508, PETRI_PLACES=266, PETRI_TRANSITIONS=380} [2024-06-20 16:51:26,017 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-20 16:51:26,017 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 380 transitions, 5508 flow [2024-06-20 16:51:26,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:26,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:26,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:26,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:51:26,018 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:26,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:26,018 INFO L85 PathProgramCache]: Analyzing trace with hash 144342412, now seen corresponding path program 4 times [2024-06-20 16:51:26,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:26,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054141871] [2024-06-20 16:51:26,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:26,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:26,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:26,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054141871] [2024-06-20 16:51:26,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054141871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:26,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:26,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:26,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108382741] [2024-06-20 16:51:26,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:26,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:26,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:26,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:26,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:26,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:26,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 380 transitions, 5508 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:26,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:26,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:26,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:27,985 INFO L124 PetriNetUnfolderBase]: 3581/5379 cut-off events. [2024-06-20 16:51:27,986 INFO L125 PetriNetUnfolderBase]: For 501582/501582 co-relation queries the response was YES. [2024-06-20 16:51:28,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48733 conditions, 5379 events. 3581/5379 cut-off events. For 501582/501582 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 28396 event pairs, 718 based on Foata normal form. 4/5381 useless extension candidates. Maximal degree in co-relation 48602. Up to 5086 conditions per place. [2024-06-20 16:51:28,038 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 332 selfloop transitions, 83 changer transitions 0/418 dead transitions. [2024-06-20 16:51:28,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 418 transitions, 6984 flow [2024-06-20 16:51:28,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:51:28,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-20 16:51:28,040 INFO L175 Difference]: Start difference. First operand has 266 places, 380 transitions, 5508 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:51:28,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 418 transitions, 6984 flow [2024-06-20 16:51:29,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 418 transitions, 6749 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-20 16:51:29,173 INFO L231 Difference]: Finished difference. Result has 270 places, 391 transitions, 5812 flow [2024-06-20 16:51:29,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5273, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5812, PETRI_PLACES=270, PETRI_TRANSITIONS=391} [2024-06-20 16:51:29,173 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-20 16:51:29,174 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 391 transitions, 5812 flow [2024-06-20 16:51:29,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:29,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:29,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:29,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:51:29,174 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:29,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:29,174 INFO L85 PathProgramCache]: Analyzing trace with hash -669553649, now seen corresponding path program 1 times [2024-06-20 16:51:29,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:29,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868587753] [2024-06-20 16:51:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:29,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:30,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:30,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868587753] [2024-06-20 16:51:30,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868587753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:30,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:30,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:30,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049808409] [2024-06-20 16:51:30,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:30,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:30,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:30,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:30,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:30,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:30,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 391 transitions, 5812 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:30,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:30,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:30,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:31,525 INFO L124 PetriNetUnfolderBase]: 3589/5391 cut-off events. [2024-06-20 16:51:31,526 INFO L125 PetriNetUnfolderBase]: For 514478/514478 co-relation queries the response was YES. [2024-06-20 16:51:31,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48967 conditions, 5391 events. 3589/5391 cut-off events. For 514478/514478 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28401 event pairs, 620 based on Foata normal form. 2/5391 useless extension candidates. Maximal degree in co-relation 48836. Up to 5208 conditions per place. [2024-06-20 16:51:31,580 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 381 selfloop transitions, 39 changer transitions 0/423 dead transitions. [2024-06-20 16:51:31,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 423 transitions, 6949 flow [2024-06-20 16:51:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:51:31,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-20 16:51:31,581 INFO L175 Difference]: Start difference. First operand has 270 places, 391 transitions, 5812 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:51:31,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 423 transitions, 6949 flow [2024-06-20 16:51:32,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 423 transitions, 6811 flow, removed 68 selfloop flow, removed 1 redundant places. [2024-06-20 16:51:32,710 INFO L231 Difference]: Finished difference. Result has 277 places, 395 transitions, 5833 flow [2024-06-20 16:51:32,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5674, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5833, PETRI_PLACES=277, PETRI_TRANSITIONS=395} [2024-06-20 16:51:32,711 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-20 16:51:32,711 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 395 transitions, 5833 flow [2024-06-20 16:51:32,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:32,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:32,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:32,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:51:32,712 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:32,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash -669314639, now seen corresponding path program 2 times [2024-06-20 16:51:32,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:32,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232203003] [2024-06-20 16:51:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:32,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:33,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:33,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232203003] [2024-06-20 16:51:33,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232203003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:33,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:33,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:33,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854718643] [2024-06-20 16:51:33,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:33,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:33,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:33,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 395 transitions, 5833 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:33,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:33,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:33,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:35,229 INFO L124 PetriNetUnfolderBase]: 3597/5403 cut-off events. [2024-06-20 16:51:35,230 INFO L125 PetriNetUnfolderBase]: For 527990/527990 co-relation queries the response was YES. [2024-06-20 16:51:35,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49186 conditions, 5403 events. 3597/5403 cut-off events. For 527990/527990 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 28580 event pairs, 734 based on Foata normal form. 2/5403 useless extension candidates. Maximal degree in co-relation 49052. Up to 5271 conditions per place. [2024-06-20 16:51:35,285 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 379 selfloop transitions, 39 changer transitions 0/421 dead transitions. [2024-06-20 16:51:35,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 421 transitions, 6792 flow [2024-06-20 16:51:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:35,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 16:51:35,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-20 16:51:35,286 INFO L175 Difference]: Start difference. First operand has 277 places, 395 transitions, 5833 flow. Second operand 8 states and 126 transitions. [2024-06-20 16:51:35,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 421 transitions, 6792 flow [2024-06-20 16:51:36,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 421 transitions, 6680 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 16:51:36,351 INFO L231 Difference]: Finished difference. Result has 281 places, 397 transitions, 5848 flow [2024-06-20 16:51:36,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5741, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5848, PETRI_PLACES=281, PETRI_TRANSITIONS=397} [2024-06-20 16:51:36,351 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-20 16:51:36,351 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 397 transitions, 5848 flow [2024-06-20 16:51:36,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:36,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:36,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:36,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:51:36,352 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:36,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash -666693713, now seen corresponding path program 1 times [2024-06-20 16:51:36,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:36,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272622876] [2024-06-20 16:51:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:36,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:37,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:37,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272622876] [2024-06-20 16:51:37,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272622876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:37,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:37,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:37,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017328355] [2024-06-20 16:51:37,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:37,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:37,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:37,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:37,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:37,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:37,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 397 transitions, 5848 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:37,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:37,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:37,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:38,260 INFO L124 PetriNetUnfolderBase]: 3639/5460 cut-off events. [2024-06-20 16:51:38,260 INFO L125 PetriNetUnfolderBase]: For 550672/550672 co-relation queries the response was YES. [2024-06-20 16:51:38,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50119 conditions, 5460 events. 3639/5460 cut-off events. For 550672/550672 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28903 event pairs, 719 based on Foata normal form. 2/5460 useless extension candidates. Maximal degree in co-relation 49983. Up to 5267 conditions per place. [2024-06-20 16:51:38,330 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 380 selfloop transitions, 57 changer transitions 0/440 dead transitions. [2024-06-20 16:51:38,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 440 transitions, 7198 flow [2024-06-20 16:51:38,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:51:38,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 16:51:38,331 INFO L175 Difference]: Start difference. First operand has 281 places, 397 transitions, 5848 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:51:38,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 440 transitions, 7198 flow [2024-06-20 16:51:39,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 440 transitions, 7099 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:51:39,581 INFO L231 Difference]: Finished difference. Result has 285 places, 413 transitions, 6163 flow [2024-06-20 16:51:39,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5761, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6163, PETRI_PLACES=285, PETRI_TRANSITIONS=413} [2024-06-20 16:51:39,582 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-20 16:51:39,582 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 413 transitions, 6163 flow [2024-06-20 16:51:39,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:39,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:39,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:39,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:51:39,582 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)] === [2024-06-20 16:51:39,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:39,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1971560815, now seen corresponding path program 2 times [2024-06-20 16:51:39,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:39,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988664673] [2024-06-20 16:51:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:39,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:40,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:40,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988664673] [2024-06-20 16:51:40,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988664673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:40,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:40,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:40,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981675899] [2024-06-20 16:51:40,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:40,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:40,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:40,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:40,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:40,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:40,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 413 transitions, 6163 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:40,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:40,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:40,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:41,582 INFO L124 PetriNetUnfolderBase]: 3649/5475 cut-off events. [2024-06-20 16:51:41,582 INFO L125 PetriNetUnfolderBase]: For 569937/569937 co-relation queries the response was YES. [2024-06-20 16:51:41,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51336 conditions, 5475 events. 3649/5475 cut-off events. For 569937/569937 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 29001 event pairs, 737 based on Foata normal form. 2/5475 useless extension candidates. Maximal degree in co-relation 51197. Up to 5343 conditions per place. [2024-06-20 16:51:41,648 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 388 selfloop transitions, 48 changer transitions 0/439 dead transitions. [2024-06-20 16:51:41,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 439 transitions, 7190 flow [2024-06-20 16:51:41,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:41,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 16:51:41,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-20 16:51:41,649 INFO L175 Difference]: Start difference. First operand has 285 places, 413 transitions, 6163 flow. Second operand 8 states and 126 transitions. [2024-06-20 16:51:41,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 439 transitions, 7190 flow [2024-06-20 16:51:42,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 439 transitions, 7066 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-20 16:51:42,720 INFO L231 Difference]: Finished difference. Result has 291 places, 417 transitions, 6225 flow [2024-06-20 16:51:42,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6063, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6225, PETRI_PLACES=291, PETRI_TRANSITIONS=417} [2024-06-20 16:51:42,721 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-20 16:51:42,721 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 417 transitions, 6225 flow [2024-06-20 16:51:42,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:42,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:42,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:42,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:51:42,721 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)] === [2024-06-20 16:51:42,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:42,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2039214353, now seen corresponding path program 3 times [2024-06-20 16:51:42,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:42,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211892820] [2024-06-20 16:51:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:42,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:43,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:43,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211892820] [2024-06-20 16:51:43,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211892820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:43,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:43,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:43,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318944539] [2024-06-20 16:51:43,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:43,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:43,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:43,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:43,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:43,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:43,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 417 transitions, 6225 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:43,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:43,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:43,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:44,813 INFO L124 PetriNetUnfolderBase]: 3906/5843 cut-off events. [2024-06-20 16:51:44,813 INFO L125 PetriNetUnfolderBase]: For 612319/612322 co-relation queries the response was YES. [2024-06-20 16:51:44,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55088 conditions, 5843 events. 3906/5843 cut-off events. For 612319/612322 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31005 event pairs, 746 based on Foata normal form. 4/5837 useless extension candidates. Maximal degree in co-relation 54947. Up to 5499 conditions per place. [2024-06-20 16:51:44,890 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 413 selfloop transitions, 108 changer transitions 0/524 dead transitions. [2024-06-20 16:51:44,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 524 transitions, 9162 flow [2024-06-20 16:51:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:51:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:51:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 16:51:44,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-20 16:51:44,891 INFO L175 Difference]: Start difference. First operand has 291 places, 417 transitions, 6225 flow. Second operand 9 states and 145 transitions. [2024-06-20 16:51:44,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 524 transitions, 9162 flow [2024-06-20 16:51:46,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 524 transitions, 8948 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 16:51:46,265 INFO L231 Difference]: Finished difference. Result has 298 places, 480 transitions, 7590 flow [2024-06-20 16:51:46,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6103, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7590, PETRI_PLACES=298, PETRI_TRANSITIONS=480} [2024-06-20 16:51:46,265 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 257 predicate places. [2024-06-20 16:51:46,265 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 480 transitions, 7590 flow [2024-06-20 16:51:46,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:46,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:46,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:46,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:51:46,266 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:46,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:46,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1329546233, now seen corresponding path program 4 times [2024-06-20 16:51:46,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:46,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747794258] [2024-06-20 16:51:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:46,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:46,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:46,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747794258] [2024-06-20 16:51:46,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747794258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:46,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:46,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:46,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950404826] [2024-06-20 16:51:46,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:46,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:46,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:46,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:46,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:47,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:47,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 480 transitions, 7590 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:47,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:47,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:47,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:48,494 INFO L124 PetriNetUnfolderBase]: 4094/6109 cut-off events. [2024-06-20 16:51:48,494 INFO L125 PetriNetUnfolderBase]: For 657826/657828 co-relation queries the response was YES. [2024-06-20 16:51:48,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59101 conditions, 6109 events. 4094/6109 cut-off events. For 657826/657828 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 32672 event pairs, 751 based on Foata normal form. 4/6111 useless extension candidates. Maximal degree in co-relation 58956. Up to 5656 conditions per place. [2024-06-20 16:51:48,570 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 423 selfloop transitions, 150 changer transitions 0/576 dead transitions. [2024-06-20 16:51:48,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 576 transitions, 10289 flow [2024-06-20 16:51:48,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:51:48,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:51:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:51:48,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-20 16:51:48,571 INFO L175 Difference]: Start difference. First operand has 298 places, 480 transitions, 7590 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:51:48,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 576 transitions, 10289 flow [2024-06-20 16:51:50,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 576 transitions, 10045 flow, removed 118 selfloop flow, removed 2 redundant places. [2024-06-20 16:51:50,078 INFO L231 Difference]: Finished difference. Result has 308 places, 538 transitions, 8916 flow [2024-06-20 16:51:50,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7451, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8916, PETRI_PLACES=308, PETRI_TRANSITIONS=538} [2024-06-20 16:51:50,079 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-20 16:51:50,079 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 538 transitions, 8916 flow [2024-06-20 16:51:50,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:50,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:50,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:50,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:51:50,080 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)] === [2024-06-20 16:51:50,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:50,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1430079147, now seen corresponding path program 1 times [2024-06-20 16:51:50,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:50,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896851397] [2024-06-20 16:51:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:50,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:50,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:50,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896851397] [2024-06-20 16:51:50,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896851397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:50,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:50,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:50,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721803201] [2024-06-20 16:51:50,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:50,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:50,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:50,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:50,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:50,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:50,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 538 transitions, 8916 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:50,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:50,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:50,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:52,478 INFO L124 PetriNetUnfolderBase]: 4099/6123 cut-off events. [2024-06-20 16:51:52,478 INFO L125 PetriNetUnfolderBase]: For 676068/676076 co-relation queries the response was YES. [2024-06-20 16:51:52,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60410 conditions, 6123 events. 4099/6123 cut-off events. For 676068/676076 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32959 event pairs, 1091 based on Foata normal form. 9/6130 useless extension candidates. Maximal degree in co-relation 60260. Up to 6023 conditions per place. [2024-06-20 16:51:52,555 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 515 selfloop transitions, 46 changer transitions 0/564 dead transitions. [2024-06-20 16:51:52,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 564 transitions, 10198 flow [2024-06-20 16:51:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:51:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:51:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-20 16:51:52,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2024-06-20 16:51:52,557 INFO L175 Difference]: Start difference. First operand has 308 places, 538 transitions, 8916 flow. Second operand 9 states and 137 transitions. [2024-06-20 16:51:52,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 564 transitions, 10198 flow [2024-06-20 16:51:54,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 564 transitions, 10085 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-20 16:51:54,268 INFO L231 Difference]: Finished difference. Result has 315 places, 542 transitions, 8992 flow [2024-06-20 16:51:54,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8803, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8992, PETRI_PLACES=315, PETRI_TRANSITIONS=542} [2024-06-20 16:51:54,269 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-20 16:51:54,269 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 542 transitions, 8992 flow [2024-06-20 16:51:54,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:54,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:54,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:54,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:51:54,269 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:54,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:54,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1789902623, now seen corresponding path program 1 times [2024-06-20 16:51:54,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:54,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862222943] [2024-06-20 16:51:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:54,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:54,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:54,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862222943] [2024-06-20 16:51:54,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862222943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:54,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:54,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:54,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174496267] [2024-06-20 16:51:54,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:54,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:54,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:54,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:54,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:55,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:55,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 542 transitions, 8992 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:55,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:55,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:55,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:56,506 INFO L124 PetriNetUnfolderBase]: 4130/6166 cut-off events. [2024-06-20 16:51:56,506 INFO L125 PetriNetUnfolderBase]: For 703128/703136 co-relation queries the response was YES. [2024-06-20 16:51:56,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61256 conditions, 6166 events. 4130/6166 cut-off events. For 703128/703136 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 33215 event pairs, 1089 based on Foata normal form. 10/6174 useless extension candidates. Maximal degree in co-relation 61104. Up to 6033 conditions per place. [2024-06-20 16:51:56,599 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 516 selfloop transitions, 57 changer transitions 0/576 dead transitions. [2024-06-20 16:51:56,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 576 transitions, 10589 flow [2024-06-20 16:51:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:51:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:51:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-20 16:51:56,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:51:56,600 INFO L175 Difference]: Start difference. First operand has 315 places, 542 transitions, 8992 flow. Second operand 9 states and 144 transitions. [2024-06-20 16:51:56,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 576 transitions, 10589 flow [2024-06-20 16:51:58,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 576 transitions, 10505 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 16:51:58,490 INFO L231 Difference]: Finished difference. Result has 321 places, 551 transitions, 9248 flow [2024-06-20 16:51:58,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8908, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9248, PETRI_PLACES=321, PETRI_TRANSITIONS=551} [2024-06-20 16:51:58,490 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 280 predicate places. [2024-06-20 16:51:58,490 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 551 transitions, 9248 flow [2024-06-20 16:51:58,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:58,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:58,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:58,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:51:58,491 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:58,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:58,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1789902251, now seen corresponding path program 5 times [2024-06-20 16:51:58,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:58,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155088744] [2024-06-20 16:51:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:58,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:59,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:59,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155088744] [2024-06-20 16:51:59,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155088744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:59,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:59,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:51:59,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466979726] [2024-06-20 16:51:59,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:59,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:51:59,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:59,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:51:59,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:51:59,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:51:59,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 551 transitions, 9248 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:59,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:59,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:51:59,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:00,698 INFO L124 PetriNetUnfolderBase]: 4166/6209 cut-off events. [2024-06-20 16:52:00,699 INFO L125 PetriNetUnfolderBase]: For 735362/735364 co-relation queries the response was YES. [2024-06-20 16:52:00,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62170 conditions, 6209 events. 4166/6209 cut-off events. For 735362/735364 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 33295 event pairs, 743 based on Foata normal form. 6/6213 useless extension candidates. Maximal degree in co-relation 62017. Up to 5744 conditions per place. [2024-06-20 16:52:00,790 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 431 selfloop transitions, 163 changer transitions 0/597 dead transitions. [2024-06-20 16:52:00,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 597 transitions, 11161 flow [2024-06-20 16:52:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:52:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:52:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:52:00,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-20 16:52:00,791 INFO L175 Difference]: Start difference. First operand has 321 places, 551 transitions, 9248 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:52:00,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 597 transitions, 11161 flow [2024-06-20 16:52:02,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 597 transitions, 11014 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-20 16:52:02,807 INFO L231 Difference]: Finished difference. Result has 327 places, 565 transitions, 9796 flow [2024-06-20 16:52:02,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9101, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9796, PETRI_PLACES=327, PETRI_TRANSITIONS=565} [2024-06-20 16:52:02,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 286 predicate places. [2024-06-20 16:52:02,807 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 565 transitions, 9796 flow [2024-06-20 16:52:02,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:02,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:02,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:02,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:52:02,808 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:02,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:02,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1553754305, now seen corresponding path program 6 times [2024-06-20 16:52:02,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:02,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178635874] [2024-06-20 16:52:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:02,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:03,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:03,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178635874] [2024-06-20 16:52:03,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178635874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:03,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:03,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:03,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028769913] [2024-06-20 16:52:03,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:03,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:03,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:03,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:03,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:03,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:52:03,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 565 transitions, 9796 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:03,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:03,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:52:03,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:05,026 INFO L124 PetriNetUnfolderBase]: 4154/6193 cut-off events. [2024-06-20 16:52:05,026 INFO L125 PetriNetUnfolderBase]: For 741349/741351 co-relation queries the response was YES. [2024-06-20 16:52:05,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62572 conditions, 6193 events. 4154/6193 cut-off events. For 741349/741351 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 33170 event pairs, 731 based on Foata normal form. 6/6197 useless extension candidates. Maximal degree in co-relation 62417. Up to 5978 conditions per place. [2024-06-20 16:52:05,115 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 498 selfloop transitions, 89 changer transitions 0/590 dead transitions. [2024-06-20 16:52:05,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 590 transitions, 11099 flow [2024-06-20 16:52:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:52:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:52:05,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-20 16:52:05,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-20 16:52:05,116 INFO L175 Difference]: Start difference. First operand has 327 places, 565 transitions, 9796 flow. Second operand 9 states and 139 transitions. [2024-06-20 16:52:05,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 590 transitions, 11099 flow [2024-06-20 16:52:07,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 590 transitions, 10878 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-20 16:52:07,124 INFO L231 Difference]: Finished difference. Result has 335 places, 568 transitions, 9847 flow [2024-06-20 16:52:07,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9575, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9847, PETRI_PLACES=335, PETRI_TRANSITIONS=568} [2024-06-20 16:52:07,125 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 294 predicate places. [2024-06-20 16:52:07,125 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 568 transitions, 9847 flow [2024-06-20 16:52:07,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:07,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:07,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:07,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:52:07,125 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:07,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:07,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1049343659, now seen corresponding path program 2 times [2024-06-20 16:52:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:07,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127431165] [2024-06-20 16:52:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:07,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:07,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:07,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127431165] [2024-06-20 16:52:07,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127431165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:07,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:07,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:07,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46407915] [2024-06-20 16:52:07,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:07,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:07,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:07,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:07,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:07,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:52:07,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 568 transitions, 9847 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:07,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:07,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:52:07,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:09,324 INFO L124 PetriNetUnfolderBase]: 4164/6214 cut-off events. [2024-06-20 16:52:09,324 INFO L125 PetriNetUnfolderBase]: For 756294/756302 co-relation queries the response was YES. [2024-06-20 16:52:09,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62794 conditions, 6214 events. 4164/6214 cut-off events. For 756294/756302 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 33498 event pairs, 1061 based on Foata normal form. 10/6222 useless extension candidates. Maximal degree in co-relation 62636. Up to 6122 conditions per place. [2024-06-20 16:52:09,413 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 546 selfloop transitions, 42 changer transitions 0/591 dead transitions. [2024-06-20 16:52:09,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 591 transitions, 11170 flow [2024-06-20 16:52:09,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:52:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:52:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-20 16:52:09,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 16:52:09,414 INFO L175 Difference]: Start difference. First operand has 335 places, 568 transitions, 9847 flow. Second operand 9 states and 135 transitions. [2024-06-20 16:52:09,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 591 transitions, 11170 flow [2024-06-20 16:52:11,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 591 transitions, 10892 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 16:52:11,306 INFO L231 Difference]: Finished difference. Result has 338 places, 571 transitions, 9742 flow [2024-06-20 16:52:11,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9569, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9742, PETRI_PLACES=338, PETRI_TRANSITIONS=571} [2024-06-20 16:52:11,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-20 16:52:11,306 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 571 transitions, 9742 flow [2024-06-20 16:52:11,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:11,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:11,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:11,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:52:11,307 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:11,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:11,307 INFO L85 PathProgramCache]: Analyzing trace with hash 25404531, now seen corresponding path program 7 times [2024-06-20 16:52:11,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:11,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492379963] [2024-06-20 16:52:11,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:11,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:12,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:12,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492379963] [2024-06-20 16:52:12,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492379963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:12,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:12,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:12,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64463410] [2024-06-20 16:52:12,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:12,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:12,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:12,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:12,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:12,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:52:12,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 571 transitions, 9742 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:12,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:12,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:52:12,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:13,624 INFO L124 PetriNetUnfolderBase]: 4152/6191 cut-off events. [2024-06-20 16:52:13,625 INFO L125 PetriNetUnfolderBase]: For 766807/766811 co-relation queries the response was YES. [2024-06-20 16:52:13,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62389 conditions, 6191 events. 4152/6191 cut-off events. For 766807/766811 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 33188 event pairs, 748 based on Foata normal form. 8/6197 useless extension candidates. Maximal degree in co-relation 62230. Up to 5934 conditions per place. [2024-06-20 16:52:13,712 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 481 selfloop transitions, 111 changer transitions 0/595 dead transitions. [2024-06-20 16:52:13,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 595 transitions, 11166 flow [2024-06-20 16:52:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:52:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:52:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-20 16:52:13,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-20 16:52:13,714 INFO L175 Difference]: Start difference. First operand has 338 places, 571 transitions, 9742 flow. Second operand 9 states and 142 transitions. [2024-06-20 16:52:13,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 595 transitions, 11166 flow [2024-06-20 16:52:15,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 595 transitions, 10976 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-20 16:52:15,759 INFO L231 Difference]: Finished difference. Result has 340 places, 571 transitions, 9784 flow [2024-06-20 16:52:15,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9552, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9784, PETRI_PLACES=340, PETRI_TRANSITIONS=571} [2024-06-20 16:52:15,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-20 16:52:15,760 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 571 transitions, 9784 flow [2024-06-20 16:52:15,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:15,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:15,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:15,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:52:15,760 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:15,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:15,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1697696157, now seen corresponding path program 2 times [2024-06-20 16:52:15,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:15,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094232428] [2024-06-20 16:52:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:15,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:16,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:16,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094232428] [2024-06-20 16:52:16,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094232428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:16,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:16,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685020872] [2024-06-20 16:52:16,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:16,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:16,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:16,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:52:16,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 571 transitions, 9784 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:16,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:16,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:52:16,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:18,066 INFO L124 PetriNetUnfolderBase]: 4157/6205 cut-off events. [2024-06-20 16:52:18,066 INFO L125 PetriNetUnfolderBase]: For 774268/774276 co-relation queries the response was YES. [2024-06-20 16:52:18,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62760 conditions, 6205 events. 4157/6205 cut-off events. For 774268/774276 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 33451 event pairs, 1056 based on Foata normal form. 9/6212 useless extension candidates. Maximal degree in co-relation 62600. Up to 6125 conditions per place. [2024-06-20 16:52:18,148 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 554 selfloop transitions, 36 changer transitions 0/593 dead transitions. [2024-06-20 16:52:18,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 593 transitions, 11099 flow [2024-06-20 16:52:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:52:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:52:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-20 16:52:18,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 16:52:18,149 INFO L175 Difference]: Start difference. First operand has 340 places, 571 transitions, 9784 flow. Second operand 9 states and 132 transitions. [2024-06-20 16:52:18,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 593 transitions, 11099 flow [2024-06-20 16:52:20,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 593 transitions, 10871 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:52:20,322 INFO L231 Difference]: Finished difference. Result has 343 places, 574 transitions, 9714 flow [2024-06-20 16:52:20,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9556, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9714, PETRI_PLACES=343, PETRI_TRANSITIONS=574} [2024-06-20 16:52:20,323 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-20 16:52:20,323 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 574 transitions, 9714 flow [2024-06-20 16:52:20,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:20,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:20,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:20,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:52:20,324 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:20,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash 25404903, now seen corresponding path program 3 times [2024-06-20 16:52:20,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:20,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24555074] [2024-06-20 16:52:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:20,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:21,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:21,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24555074] [2024-06-20 16:52:21,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24555074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:21,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:21,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:21,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276452032] [2024-06-20 16:52:21,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:21,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:21,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:21,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:21,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:21,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:52:21,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 574 transitions, 9714 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:21,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:21,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:52:21,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:22,742 INFO L124 PetriNetUnfolderBase]: 4151/6197 cut-off events. [2024-06-20 16:52:22,742 INFO L125 PetriNetUnfolderBase]: For 785798/785806 co-relation queries the response was YES. [2024-06-20 16:52:22,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62514 conditions, 6197 events. 4151/6197 cut-off events. For 785798/785806 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 33375 event pairs, 1056 based on Foata normal form. 10/6205 useless extension candidates. Maximal degree in co-relation 62353. Up to 6091 conditions per place. [2024-06-20 16:52:22,819 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 543 selfloop transitions, 49 changer transitions 0/595 dead transitions. [2024-06-20 16:52:22,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 595 transitions, 10976 flow [2024-06-20 16:52:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:52:22,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:52:22,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-20 16:52:22,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 16:52:22,821 INFO L175 Difference]: Start difference. First operand has 343 places, 574 transitions, 9714 flow. Second operand 9 states and 138 transitions. [2024-06-20 16:52:22,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 595 transitions, 10976 flow [2024-06-20 16:52:24,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 595 transitions, 10832 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 16:52:24,759 INFO L231 Difference]: Finished difference. Result has 347 places, 574 transitions, 9675 flow [2024-06-20 16:52:24,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9570, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9675, PETRI_PLACES=347, PETRI_TRANSITIONS=574} [2024-06-20 16:52:24,759 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-20 16:52:24,760 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 574 transitions, 9675 flow [2024-06-20 16:52:24,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:24,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:24,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:24,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:52:24,760 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)] === [2024-06-20 16:52:24,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:24,761 INFO L85 PathProgramCache]: Analyzing trace with hash 25281585, now seen corresponding path program 3 times [2024-06-20 16:52:24,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:24,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981263855] [2024-06-20 16:52:24,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:24,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:25,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:25,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981263855] [2024-06-20 16:52:25,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981263855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:25,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:25,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:52:25,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984419366] [2024-06-20 16:52:25,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:25,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:52:25,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:52:25,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:52:25,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:52:25,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 574 transitions, 9675 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:25,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:25,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:52:25,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:27,606 INFO L124 PetriNetUnfolderBase]: 4159/6202 cut-off events. [2024-06-20 16:52:27,607 INFO L125 PetriNetUnfolderBase]: For 802107/802111 co-relation queries the response was YES. [2024-06-20 16:52:27,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62744 conditions, 6202 events. 4159/6202 cut-off events. For 802107/802111 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33209 event pairs, 728 based on Foata normal form. 6/6206 useless extension candidates. Maximal degree in co-relation 62582. Up to 5991 conditions per place. [2024-06-20 16:52:27,696 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 511 selfloop transitions, 84 changer transitions 0/598 dead transitions. [2024-06-20 16:52:27,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 598 transitions, 10969 flow [2024-06-20 16:52:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:52:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:52:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-20 16:52:27,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-20 16:52:27,698 INFO L175 Difference]: Start difference. First operand has 347 places, 574 transitions, 9675 flow. Second operand 9 states and 139 transitions. [2024-06-20 16:52:27,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 598 transitions, 10969 flow [2024-06-20 16:52:29,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 598 transitions, 10828 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 16:52:29,662 INFO L231 Difference]: Finished difference. Result has 348 places, 576 transitions, 9736 flow [2024-06-20 16:52:29,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9534, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9736, PETRI_PLACES=348, PETRI_TRANSITIONS=576} [2024-06-20 16:52:29,663 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-20 16:52:29,663 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 576 transitions, 9736 flow [2024-06-20 16:52:29,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:29,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:29,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:29,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:52:29,663 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)] === [2024-06-20 16:52:29,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1049334731, now seen corresponding path program 1 times [2024-06-20 16:52:29,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:29,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372446023] [2024-06-20 16:52:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:30,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372446023] [2024-06-20 16:52:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372446023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:30,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:30,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:52:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289200485] [2024-06-20 16:52:30,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:30,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:52:30,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:30,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:52:30,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:52:30,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:52:30,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 576 transitions, 9736 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:30,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:30,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:52:30,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:32,253 INFO L124 PetriNetUnfolderBase]: 4172/6228 cut-off events. [2024-06-20 16:52:32,254 INFO L125 PetriNetUnfolderBase]: For 823547/823555 co-relation queries the response was YES. [2024-06-20 16:52:32,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63203 conditions, 6228 events. 4172/6228 cut-off events. For 823547/823555 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33539 event pairs, 1079 based on Foata normal form. 10/6236 useless extension candidates. Maximal degree in co-relation 63040. Up to 6119 conditions per place. [2024-06-20 16:52:32,343 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 547 selfloop transitions, 51 changer transitions 0/601 dead transitions. [2024-06-20 16:52:32,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 601 transitions, 11075 flow [2024-06-20 16:52:32,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:52:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:52:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-20 16:52:32,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2024-06-20 16:52:32,344 INFO L175 Difference]: Start difference. First operand has 348 places, 576 transitions, 9736 flow. Second operand 9 states and 137 transitions. [2024-06-20 16:52:32,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 601 transitions, 11075 flow [2024-06-20 16:52:34,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 601 transitions, 10951 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 16:52:34,881 INFO L231 Difference]: Finished difference. Result has 353 places, 581 transitions, 9802 flow [2024-06-20 16:52:34,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9612, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9802, PETRI_PLACES=353, PETRI_TRANSITIONS=581} [2024-06-20 16:52:34,882 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 312 predicate places. [2024-06-20 16:52:34,882 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 581 transitions, 9802 flow [2024-06-20 16:52:34,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:34,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:34,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:34,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:52:34,883 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:34,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:34,883 INFO L85 PathProgramCache]: Analyzing trace with hash 692479365, now seen corresponding path program 4 times [2024-06-20 16:52:34,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:34,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039624435] [2024-06-20 16:52:34,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:34,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:35,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:35,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039624435] [2024-06-20 16:52:35,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039624435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:35,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:35,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:35,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532444343] [2024-06-20 16:52:35,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:35,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:35,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:35,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:35,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:35,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:52:35,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 581 transitions, 9802 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:35,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:35,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:52:35,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:37,127 INFO L124 PetriNetUnfolderBase]: 4214/6286 cut-off events. [2024-06-20 16:52:37,127 INFO L125 PetriNetUnfolderBase]: For 860617/860625 co-relation queries the response was YES. [2024-06-20 16:52:37,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64574 conditions, 6286 events. 4214/6286 cut-off events. For 860617/860625 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 33862 event pairs, 1063 based on Foata normal form. 10/6294 useless extension candidates. Maximal degree in co-relation 64410. Up to 6100 conditions per place. [2024-06-20 16:52:37,229 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 528 selfloop transitions, 80 changer transitions 0/611 dead transitions. [2024-06-20 16:52:37,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 611 transitions, 11542 flow [2024-06-20 16:52:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:52:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:52:37,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:52:37,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-20 16:52:37,230 INFO L175 Difference]: Start difference. First operand has 353 places, 581 transitions, 9802 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:52:37,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 611 transitions, 11542 flow [2024-06-20 16:52:39,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 611 transitions, 11426 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 16:52:39,906 INFO L231 Difference]: Finished difference. Result has 357 places, 590 transitions, 10191 flow [2024-06-20 16:52:39,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9686, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10191, PETRI_PLACES=357, PETRI_TRANSITIONS=590} [2024-06-20 16:52:39,907 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-20 16:52:39,907 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 590 transitions, 10191 flow [2024-06-20 16:52:39,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:39,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:39,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:39,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:52:39,908 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:39,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:39,908 INFO L85 PathProgramCache]: Analyzing trace with hash 692478993, now seen corresponding path program 8 times [2024-06-20 16:52:39,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:39,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403360222] [2024-06-20 16:52:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:39,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:40,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:40,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403360222] [2024-06-20 16:52:40,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403360222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:40,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:40,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:40,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084726779] [2024-06-20 16:52:40,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:40,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:40,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:40,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:40,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:40,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:52:40,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 590 transitions, 10191 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:40,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:40,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:52:40,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:42,134 INFO L124 PetriNetUnfolderBase]: 4232/6304 cut-off events. [2024-06-20 16:52:42,135 INFO L125 PetriNetUnfolderBase]: For 883625/883629 co-relation queries the response was YES. [2024-06-20 16:52:42,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65316 conditions, 6304 events. 4232/6304 cut-off events. For 883625/883629 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33828 event pairs, 738 based on Foata normal form. 6/6308 useless extension candidates. Maximal degree in co-relation 65150. Up to 5710 conditions per place. [2024-06-20 16:52:42,233 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 408 selfloop transitions, 208 changer transitions 0/619 dead transitions. [2024-06-20 16:52:42,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 619 transitions, 11949 flow [2024-06-20 16:52:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:52:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:52:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:52:42,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-20 16:52:42,234 INFO L175 Difference]: Start difference. First operand has 357 places, 590 transitions, 10191 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:52:42,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 619 transitions, 11949 flow [2024-06-20 16:52:44,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 619 transitions, 11774 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-20 16:52:44,569 INFO L231 Difference]: Finished difference. Result has 360 places, 596 transitions, 10568 flow [2024-06-20 16:52:44,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10020, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10568, PETRI_PLACES=360, PETRI_TRANSITIONS=596} [2024-06-20 16:52:44,569 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 319 predicate places. [2024-06-20 16:52:44,569 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 596 transitions, 10568 flow [2024-06-20 16:52:44,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:44,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:44,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:44,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:52:44,570 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:44,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:44,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2039513069, now seen corresponding path program 3 times [2024-06-20 16:52:44,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:44,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126307808] [2024-06-20 16:52:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:44,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:45,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:45,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126307808] [2024-06-20 16:52:45,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126307808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:45,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:45,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:45,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456835053] [2024-06-20 16:52:45,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:45,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:45,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:45,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:45,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:45,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:52:45,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 596 transitions, 10568 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:45,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:45,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:52:45,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:46,975 INFO L124 PetriNetUnfolderBase]: 4237/6318 cut-off events. [2024-06-20 16:52:46,975 INFO L125 PetriNetUnfolderBase]: For 884155/884163 co-relation queries the response was YES. [2024-06-20 16:52:47,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65885 conditions, 6318 events. 4237/6318 cut-off events. For 884155/884163 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 34100 event pairs, 1075 based on Foata normal form. 9/6325 useless extension candidates. Maximal degree in co-relation 65718. Up to 6197 conditions per place. [2024-06-20 16:52:47,067 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 555 selfloop transitions, 59 changer transitions 0/617 dead transitions. [2024-06-20 16:52:47,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 617 transitions, 11939 flow [2024-06-20 16:52:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:52:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:52:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-20 16:52:47,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-20 16:52:47,068 INFO L175 Difference]: Start difference. First operand has 360 places, 596 transitions, 10568 flow. Second operand 8 states and 121 transitions. [2024-06-20 16:52:47,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 617 transitions, 11939 flow [2024-06-20 16:52:49,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 617 transitions, 11652 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 16:52:49,587 INFO L231 Difference]: Finished difference. Result has 363 places, 599 transitions, 10495 flow [2024-06-20 16:52:49,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10281, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10495, PETRI_PLACES=363, PETRI_TRANSITIONS=599} [2024-06-20 16:52:49,588 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-20 16:52:49,588 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 599 transitions, 10495 flow [2024-06-20 16:52:49,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:49,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:49,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:49,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:52:49,588 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:49,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:49,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2078085371, now seen corresponding path program 5 times [2024-06-20 16:52:49,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:49,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874027818] [2024-06-20 16:52:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:49,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:50,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:50,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874027818] [2024-06-20 16:52:50,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874027818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:50,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:50,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:50,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415437362] [2024-06-20 16:52:50,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:50,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:50,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:50,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:50,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:50,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:52:50,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 599 transitions, 10495 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:50,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:50,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:52:50,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:52,081 INFO L124 PetriNetUnfolderBase]: 4247/6332 cut-off events. [2024-06-20 16:52:52,081 INFO L125 PetriNetUnfolderBase]: For 886502/886510 co-relation queries the response was YES. [2024-06-20 16:52:52,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65596 conditions, 6332 events. 4247/6332 cut-off events. For 886502/886510 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34134 event pairs, 1072 based on Foata normal form. 10/6340 useless extension candidates. Maximal degree in co-relation 65429. Up to 6234 conditions per place. [2024-06-20 16:52:52,164 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 570 selfloop transitions, 45 changer transitions 0/618 dead transitions. [2024-06-20 16:52:52,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 618 transitions, 11869 flow [2024-06-20 16:52:52,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:52:52,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:52:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-20 16:52:52,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 16:52:52,166 INFO L175 Difference]: Start difference. First operand has 363 places, 599 transitions, 10495 flow. Second operand 8 states and 120 transitions. [2024-06-20 16:52:52,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 618 transitions, 11869 flow [2024-06-20 16:52:54,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 618 transitions, 11731 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 16:52:54,326 INFO L231 Difference]: Finished difference. Result has 366 places, 602 transitions, 10549 flow [2024-06-20 16:52:54,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10357, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10549, PETRI_PLACES=366, PETRI_TRANSITIONS=602} [2024-06-20 16:52:54,327 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-20 16:52:54,327 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 602 transitions, 10549 flow [2024-06-20 16:52:54,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:54,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:54,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:54,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:52:54,328 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:54,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1135682067, now seen corresponding path program 6 times [2024-06-20 16:52:54,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:54,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732738517] [2024-06-20 16:52:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:54,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:55,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:55,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732738517] [2024-06-20 16:52:55,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732738517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:55,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:55,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:55,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375664850] [2024-06-20 16:52:55,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:55,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:55,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:55,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:55,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:55,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:52:55,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 602 transitions, 10549 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:55,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:55,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:52:55,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:56,656 INFO L124 PetriNetUnfolderBase]: 4266/6359 cut-off events. [2024-06-20 16:52:56,656 INFO L125 PetriNetUnfolderBase]: For 878249/878255 co-relation queries the response was YES. [2024-06-20 16:52:56,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65569 conditions, 6359 events. 4266/6359 cut-off events. For 878249/878255 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 34304 event pairs, 1085 based on Foata normal form. 6/6361 useless extension candidates. Maximal degree in co-relation 65401. Up to 6242 conditions per place. [2024-06-20 16:52:56,749 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 566 selfloop transitions, 61 changer transitions 0/630 dead transitions. [2024-06-20 16:52:56,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 630 transitions, 12119 flow [2024-06-20 16:52:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:52:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:52:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-20 16:52:56,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3638888888888889 [2024-06-20 16:52:56,750 INFO L175 Difference]: Start difference. First operand has 366 places, 602 transitions, 10549 flow. Second operand 9 states and 131 transitions. [2024-06-20 16:52:56,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 630 transitions, 12119 flow [2024-06-20 16:52:59,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 630 transitions, 11926 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 16:52:59,261 INFO L231 Difference]: Finished difference. Result has 370 places, 615 transitions, 10795 flow [2024-06-20 16:52:59,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10374, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10795, PETRI_PLACES=370, PETRI_TRANSITIONS=615} [2024-06-20 16:52:59,261 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 329 predicate places. [2024-06-20 16:52:59,262 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 615 transitions, 10795 flow [2024-06-20 16:52:59,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:59,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:59,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:59,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:52:59,262 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:59,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:59,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2078442863, now seen corresponding path program 9 times [2024-06-20 16:52:59,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:59,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120892262] [2024-06-20 16:52:59,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:59,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:59,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:59,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120892262] [2024-06-20 16:52:59,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120892262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:59,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:59,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:59,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031057246] [2024-06-20 16:52:59,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:59,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:59,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:59,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:00,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:53:00,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 615 transitions, 10795 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:00,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:00,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:53:00,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:01,811 INFO L124 PetriNetUnfolderBase]: 4260/6343 cut-off events. [2024-06-20 16:53:01,812 INFO L125 PetriNetUnfolderBase]: For 867080/867084 co-relation queries the response was YES. [2024-06-20 16:53:01,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65271 conditions, 6343 events. 4260/6343 cut-off events. For 867080/867084 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 34023 event pairs, 736 based on Foata normal form. 6/6347 useless extension candidates. Maximal degree in co-relation 65102. Up to 6123 conditions per place. [2024-06-20 16:53:01,907 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 536 selfloop transitions, 93 changer transitions 0/632 dead transitions. [2024-06-20 16:53:01,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 632 transitions, 12116 flow [2024-06-20 16:53:01,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-20 16:53:01,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-20 16:53:01,908 INFO L175 Difference]: Start difference. First operand has 370 places, 615 transitions, 10795 flow. Second operand 8 states and 122 transitions. [2024-06-20 16:53:01,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 632 transitions, 12116 flow [2024-06-20 16:53:04,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 632 transitions, 11981 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-20 16:53:04,454 INFO L231 Difference]: Finished difference. Result has 376 places, 616 transitions, 10882 flow [2024-06-20 16:53:04,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10660, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10882, PETRI_PLACES=376, PETRI_TRANSITIONS=616} [2024-06-20 16:53:04,454 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-20 16:53:04,455 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 616 transitions, 10882 flow [2024-06-20 16:53:04,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:04,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:04,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:04,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:53:04,455 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:53:04,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:04,456 INFO L85 PathProgramCache]: Analyzing trace with hash -754076315, now seen corresponding path program 4 times [2024-06-20 16:53:04,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:04,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021882030] [2024-06-20 16:53:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:04,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:05,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:05,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021882030] [2024-06-20 16:53:05,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021882030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:05,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:05,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:05,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128922906] [2024-06-20 16:53:05,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:05,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:05,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:05,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:05,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:05,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:53:05,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 616 transitions, 10882 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:05,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:05,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:53:05,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:06,780 INFO L124 PetriNetUnfolderBase]: 4265/6358 cut-off events. [2024-06-20 16:53:06,780 INFO L125 PetriNetUnfolderBase]: For 889290/889294 co-relation queries the response was YES. [2024-06-20 16:53:06,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65661 conditions, 6358 events. 4265/6358 cut-off events. For 889290/889294 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 34309 event pairs, 1069 based on Foata normal form. 5/6361 useless extension candidates. Maximal degree in co-relation 65489. Up to 6272 conditions per place. [2024-06-20 16:53:06,877 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 586 selfloop transitions, 45 changer transitions 0/634 dead transitions. [2024-06-20 16:53:06,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 634 transitions, 12273 flow [2024-06-20 16:53:06,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-20 16:53:06,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-20 16:53:06,879 INFO L175 Difference]: Start difference. First operand has 376 places, 616 transitions, 10882 flow. Second operand 8 states and 117 transitions. [2024-06-20 16:53:06,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 634 transitions, 12273 flow [2024-06-20 16:53:09,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 634 transitions, 12140 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 16:53:09,696 INFO L231 Difference]: Finished difference. Result has 380 places, 619 transitions, 10935 flow [2024-06-20 16:53:09,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10749, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10935, PETRI_PLACES=380, PETRI_TRANSITIONS=619} [2024-06-20 16:53:09,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-20 16:53:09,697 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 619 transitions, 10935 flow [2024-06-20 16:53:09,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:09,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:09,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:09,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:53:09,697 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:53:09,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:09,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1135681695, now seen corresponding path program 10 times [2024-06-20 16:53:09,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:09,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107581099] [2024-06-20 16:53:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:09,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:10,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:10,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107581099] [2024-06-20 16:53:10,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107581099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:10,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:10,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:10,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030733463] [2024-06-20 16:53:10,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:10,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:10,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:10,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:10,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:10,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:53:10,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 619 transitions, 10935 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:10,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:10,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:53:10,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:12,042 INFO L124 PetriNetUnfolderBase]: 4259/6342 cut-off events. [2024-06-20 16:53:12,042 INFO L125 PetriNetUnfolderBase]: For 882240/882244 co-relation queries the response was YES. [2024-06-20 16:53:12,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65273 conditions, 6342 events. 4259/6342 cut-off events. For 882240/882244 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 34055 event pairs, 747 based on Foata normal form. 6/6346 useless extension candidates. Maximal degree in co-relation 65101. Up to 6059 conditions per place. [2024-06-20 16:53:12,143 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 510 selfloop transitions, 124 changer transitions 0/637 dead transitions. [2024-06-20 16:53:12,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 637 transitions, 12429 flow [2024-06-20 16:53:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 16:53:12,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-20 16:53:12,144 INFO L175 Difference]: Start difference. First operand has 380 places, 619 transitions, 10935 flow. Second operand 8 states and 125 transitions. [2024-06-20 16:53:12,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 637 transitions, 12429 flow [2024-06-20 16:53:14,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 637 transitions, 12264 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 16:53:14,641 INFO L231 Difference]: Finished difference. Result has 381 places, 619 transitions, 11034 flow [2024-06-20 16:53:14,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10772, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11034, PETRI_PLACES=381, PETRI_TRANSITIONS=619} [2024-06-20 16:53:14,642 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-20 16:53:14,642 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 619 transitions, 11034 flow [2024-06-20 16:53:14,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:14,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:14,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:14,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:53:14,642 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:53:14,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:14,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2078076443, now seen corresponding path program 2 times [2024-06-20 16:53:14,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:14,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536782778] [2024-06-20 16:53:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:14,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:15,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:15,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536782778] [2024-06-20 16:53:15,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536782778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:15,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:15,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:53:15,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680092465] [2024-06-20 16:53:15,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:15,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:53:15,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:15,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:53:15,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:53:15,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:53:15,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 619 transitions, 11034 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:15,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:15,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:53:15,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:17,632 INFO L124 PetriNetUnfolderBase]: 4267/6362 cut-off events. [2024-06-20 16:53:17,632 INFO L125 PetriNetUnfolderBase]: For 884557/884561 co-relation queries the response was YES. [2024-06-20 16:53:17,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65629 conditions, 6362 events. 4267/6362 cut-off events. For 884557/884561 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34328 event pairs, 1078 based on Foata normal form. 6/6366 useless extension candidates. Maximal degree in co-relation 65456. Up to 6244 conditions per place. [2024-06-20 16:53:17,730 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 575 selfloop transitions, 59 changer transitions 0/637 dead transitions. [2024-06-20 16:53:17,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 637 transitions, 12414 flow [2024-06-20 16:53:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-20 16:53:17,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-20 16:53:17,731 INFO L175 Difference]: Start difference. First operand has 381 places, 619 transitions, 11034 flow. Second operand 8 states and 122 transitions. [2024-06-20 16:53:17,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 637 transitions, 12414 flow [2024-06-20 16:53:20,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 637 transitions, 12175 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:53:20,090 INFO L231 Difference]: Finished difference. Result has 383 places, 621 transitions, 10985 flow [2024-06-20 16:53:20,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10795, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10985, PETRI_PLACES=383, PETRI_TRANSITIONS=621} [2024-06-20 16:53:20,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-20 16:53:20,091 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 621 transitions, 10985 flow [2024-06-20 16:53:20,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:20,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:20,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:20,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:53:20,092 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)] === [2024-06-20 16:53:20,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:20,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1135558749, now seen corresponding path program 4 times [2024-06-20 16:53:20,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:20,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989913296] [2024-06-20 16:53:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:20,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:21,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:21,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989913296] [2024-06-20 16:53:21,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989913296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:21,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:21,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:53:21,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115279936] [2024-06-20 16:53:21,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:21,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:53:21,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:21,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:53:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:53:21,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:53:21,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 621 transitions, 10985 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:21,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:21,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:53:21,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:23,029 INFO L124 PetriNetUnfolderBase]: 4275/6366 cut-off events. [2024-06-20 16:53:23,029 INFO L125 PetriNetUnfolderBase]: For 883938/883942 co-relation queries the response was YES. [2024-06-20 16:53:23,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65573 conditions, 6366 events. 4275/6366 cut-off events. For 883938/883942 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 34206 event pairs, 745 based on Foata normal form. 6/6370 useless extension candidates. Maximal degree in co-relation 65400. Up to 6150 conditions per place. [2024-06-20 16:53:23,129 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 550 selfloop transitions, 86 changer transitions 0/639 dead transitions. [2024-06-20 16:53:23,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 639 transitions, 12337 flow [2024-06-20 16:53:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-20 16:53:23,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-20 16:53:23,130 INFO L175 Difference]: Start difference. First operand has 383 places, 621 transitions, 10985 flow. Second operand 8 states and 122 transitions. [2024-06-20 16:53:23,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 639 transitions, 12337 flow [2024-06-20 16:53:26,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 639 transitions, 12167 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 16:53:26,042 INFO L231 Difference]: Finished difference. Result has 385 places, 623 transitions, 11028 flow [2024-06-20 16:53:26,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10815, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11028, PETRI_PLACES=385, PETRI_TRANSITIONS=623} [2024-06-20 16:53:26,043 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-20 16:53:26,043 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 623 transitions, 11028 flow [2024-06-20 16:53:26,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:26,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:26,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:26,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:53:26,043 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)] === [2024-06-20 16:53:26,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:26,044 INFO L85 PathProgramCache]: Analyzing trace with hash 703420969, now seen corresponding path program 5 times [2024-06-20 16:53:26,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:26,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170457528] [2024-06-20 16:53:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:26,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:26,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:26,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170457528] [2024-06-20 16:53:26,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170457528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:26,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:26,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:26,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994616197] [2024-06-20 16:53:26,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:26,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:26,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:26,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:26,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:26,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:53:26,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 623 transitions, 11028 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:26,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:26,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:53:26,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:28,437 INFO L124 PetriNetUnfolderBase]: 4272/6375 cut-off events. [2024-06-20 16:53:28,437 INFO L125 PetriNetUnfolderBase]: For 882145/882157 co-relation queries the response was YES. [2024-06-20 16:53:28,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65359 conditions, 6375 events. 4272/6375 cut-off events. For 882145/882157 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 34470 event pairs, 1077 based on Foata normal form. 9/6377 useless extension candidates. Maximal degree in co-relation 65185. Up to 6132 conditions per place. [2024-06-20 16:53:28,534 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 532 selfloop transitions, 105 changer transitions 0/640 dead transitions. [2024-06-20 16:53:28,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 640 transitions, 12528 flow [2024-06-20 16:53:28,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:28,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 16:53:28,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-20 16:53:28,535 INFO L175 Difference]: Start difference. First operand has 385 places, 623 transitions, 11028 flow. Second operand 8 states and 124 transitions. [2024-06-20 16:53:28,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 640 transitions, 12528 flow [2024-06-20 16:53:31,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 640 transitions, 12315 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:53:31,047 INFO L231 Difference]: Finished difference. Result has 387 places, 623 transitions, 11033 flow [2024-06-20 16:53:31,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10817, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11033, PETRI_PLACES=387, PETRI_TRANSITIONS=623} [2024-06-20 16:53:31,048 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-20 16:53:31,048 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 623 transitions, 11033 flow [2024-06-20 16:53:31,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:31,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:31,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:31,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:53:31,049 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)] === [2024-06-20 16:53:31,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:31,049 INFO L85 PathProgramCache]: Analyzing trace with hash 463913233, now seen corresponding path program 11 times [2024-06-20 16:53:31,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:31,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505812031] [2024-06-20 16:53:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:31,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:31,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:31,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505812031] [2024-06-20 16:53:31,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505812031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:31,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:31,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:31,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873700288] [2024-06-20 16:53:31,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:31,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:31,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:31,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:31,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:31,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:53:31,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 623 transitions, 11033 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:31,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:31,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:53:31,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:33,438 INFO L124 PetriNetUnfolderBase]: 4350/6473 cut-off events. [2024-06-20 16:53:33,439 INFO L125 PetriNetUnfolderBase]: For 919474/919480 co-relation queries the response was YES. [2024-06-20 16:53:33,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66834 conditions, 6473 events. 4350/6473 cut-off events. For 919474/919480 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34763 event pairs, 736 based on Foata normal form. 10/6466 useless extension candidates. Maximal degree in co-relation 66659. Up to 5018 conditions per place. [2024-06-20 16:53:33,541 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 435 selfloop transitions, 244 changer transitions 0/682 dead transitions. [2024-06-20 16:53:33,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 682 transitions, 13639 flow [2024-06-20 16:53:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:53:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:53:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:53:33,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 16:53:33,544 INFO L175 Difference]: Start difference. First operand has 387 places, 623 transitions, 11033 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:53:33,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 682 transitions, 13639 flow [2024-06-20 16:53:35,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 682 transitions, 13455 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 16:53:35,792 INFO L231 Difference]: Finished difference. Result has 394 places, 652 transitions, 12187 flow [2024-06-20 16:53:35,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10849, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12187, PETRI_PLACES=394, PETRI_TRANSITIONS=652} [2024-06-20 16:53:35,793 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 353 predicate places. [2024-06-20 16:53:35,793 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 652 transitions, 12187 flow [2024-06-20 16:53:35,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:35,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:35,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:35,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:53:35,794 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)] === [2024-06-20 16:53:35,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash 328255835, now seen corresponding path program 12 times [2024-06-20 16:53:35,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:35,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161727061] [2024-06-20 16:53:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:35,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:36,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:36,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161727061] [2024-06-20 16:53:36,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161727061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:36,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:36,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:36,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758419247] [2024-06-20 16:53:36,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:36,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:36,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:36,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:53:36,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 652 transitions, 12187 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:36,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:36,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:53:36,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:38,327 INFO L124 PetriNetUnfolderBase]: 4392/6532 cut-off events. [2024-06-20 16:53:38,327 INFO L125 PetriNetUnfolderBase]: For 958007/958013 co-relation queries the response was YES. [2024-06-20 16:53:38,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69990 conditions, 6532 events. 4392/6532 cut-off events. For 958007/958013 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 35195 event pairs, 727 based on Foata normal form. 10/6525 useless extension candidates. Maximal degree in co-relation 69811. Up to 5057 conditions per place. [2024-06-20 16:53:38,429 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 443 selfloop transitions, 240 changer transitions 0/686 dead transitions. [2024-06-20 16:53:38,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 686 transitions, 14425 flow [2024-06-20 16:53:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:53:38,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 16:53:38,431 INFO L175 Difference]: Start difference. First operand has 394 places, 652 transitions, 12187 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:53:38,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 686 transitions, 14425 flow [2024-06-20 16:53:40,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 686 transitions, 14027 flow, removed 161 selfloop flow, removed 3 redundant places. [2024-06-20 16:53:40,671 INFO L231 Difference]: Finished difference. Result has 400 places, 660 transitions, 12508 flow [2024-06-20 16:53:40,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11857, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12508, PETRI_PLACES=400, PETRI_TRANSITIONS=660} [2024-06-20 16:53:40,672 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 359 predicate places. [2024-06-20 16:53:40,672 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 660 transitions, 12508 flow [2024-06-20 16:53:40,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:40,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:40,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:40,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:53:40,672 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)] === [2024-06-20 16:53:40,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:40,673 INFO L85 PathProgramCache]: Analyzing trace with hash 464211949, now seen corresponding path program 6 times [2024-06-20 16:53:40,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:40,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416809505] [2024-06-20 16:53:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:40,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:41,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:41,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416809505] [2024-06-20 16:53:41,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416809505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:41,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:41,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:41,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784749711] [2024-06-20 16:53:41,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:41,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:41,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:41,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:41,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:41,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:53:41,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 660 transitions, 12508 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:41,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:41,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:53:41,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:43,283 INFO L124 PetriNetUnfolderBase]: 4389/6537 cut-off events. [2024-06-20 16:53:43,283 INFO L125 PetriNetUnfolderBase]: For 947888/947900 co-relation queries the response was YES. [2024-06-20 16:53:43,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69529 conditions, 6537 events. 4389/6537 cut-off events. For 947888/947900 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 35458 event pairs, 1093 based on Foata normal form. 9/6540 useless extension candidates. Maximal degree in co-relation 69347. Up to 6296 conditions per place. [2024-06-20 16:53:43,392 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 578 selfloop transitions, 95 changer transitions 0/676 dead transitions. [2024-06-20 16:53:43,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 676 transitions, 13912 flow [2024-06-20 16:53:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-20 16:53:43,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-20 16:53:43,393 INFO L175 Difference]: Start difference. First operand has 400 places, 660 transitions, 12508 flow. Second operand 8 states and 123 transitions. [2024-06-20 16:53:43,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 676 transitions, 13912 flow [2024-06-20 16:53:46,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 676 transitions, 13402 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-20 16:53:46,474 INFO L231 Difference]: Finished difference. Result has 404 places, 660 transitions, 12194 flow [2024-06-20 16:53:46,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11998, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12194, PETRI_PLACES=404, PETRI_TRANSITIONS=660} [2024-06-20 16:53:46,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 363 predicate places. [2024-06-20 16:53:46,475 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 660 transitions, 12194 flow [2024-06-20 16:53:46,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:46,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:46,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:46,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:53:46,475 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)] === [2024-06-20 16:53:46,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:46,476 INFO L85 PathProgramCache]: Analyzing trace with hash 328256207, now seen corresponding path program 7 times [2024-06-20 16:53:46,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:46,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61160953] [2024-06-20 16:53:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:46,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:47,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:47,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61160953] [2024-06-20 16:53:47,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61160953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:47,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:47,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:47,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992277611] [2024-06-20 16:53:47,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:47,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:47,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:47,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:47,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:47,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:53:47,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 660 transitions, 12194 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:47,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:47,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:53:47,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:48,985 INFO L124 PetriNetUnfolderBase]: 4393/6543 cut-off events. [2024-06-20 16:53:48,986 INFO L125 PetriNetUnfolderBase]: For 967809/967821 co-relation queries the response was YES. [2024-06-20 16:53:49,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68877 conditions, 6543 events. 4393/6543 cut-off events. For 967809/967821 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35407 event pairs, 1033 based on Foata normal form. 12/6549 useless extension candidates. Maximal degree in co-relation 68694. Up to 5900 conditions per place. [2024-06-20 16:53:49,082 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 508 selfloop transitions, 173 changer transitions 0/684 dead transitions. [2024-06-20 16:53:49,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 684 transitions, 14079 flow [2024-06-20 16:53:49,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:49,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:53:49,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 16:53:49,083 INFO L175 Difference]: Start difference. First operand has 404 places, 660 transitions, 12194 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:53:49,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 684 transitions, 14079 flow [2024-06-20 16:53:52,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 684 transitions, 13881 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:53:52,100 INFO L231 Difference]: Finished difference. Result has 407 places, 663 transitions, 12442 flow [2024-06-20 16:53:52,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11996, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12442, PETRI_PLACES=407, PETRI_TRANSITIONS=663} [2024-06-20 16:53:52,101 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-20 16:53:52,101 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 663 transitions, 12442 flow [2024-06-20 16:53:52,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:52,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:52,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:52,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:53:52,101 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)] === [2024-06-20 16:53:52,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:52,101 INFO L85 PathProgramCache]: Analyzing trace with hash 338433197, now seen corresponding path program 8 times [2024-06-20 16:53:52,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:52,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171002802] [2024-06-20 16:53:52,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:52,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:52,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:52,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171002802] [2024-06-20 16:53:52,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171002802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:52,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:52,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:52,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584700297] [2024-06-20 16:53:52,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:52,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:52,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:52,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:52,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:52,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:53:52,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 663 transitions, 12442 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:52,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:52,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:53:52,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:54,684 INFO L124 PetriNetUnfolderBase]: 4397/6551 cut-off events. [2024-06-20 16:53:54,684 INFO L125 PetriNetUnfolderBase]: For 985706/985706 co-relation queries the response was YES. [2024-06-20 16:53:54,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69419 conditions, 6551 events. 4397/6551 cut-off events. For 985706/985706 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35516 event pairs, 1262 based on Foata normal form. 4/6553 useless extension candidates. Maximal degree in co-relation 69235. Up to 6384 conditions per place. [2024-06-20 16:53:54,798 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 629 selfloop transitions, 55 changer transitions 0/687 dead transitions. [2024-06-20 16:53:54,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 687 transitions, 14322 flow [2024-06-20 16:53:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:53:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:53:54,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 16:53:54,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 16:53:54,799 INFO L175 Difference]: Start difference. First operand has 407 places, 663 transitions, 12442 flow. Second operand 9 states and 140 transitions. [2024-06-20 16:53:54,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 687 transitions, 14322 flow [2024-06-20 16:53:58,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 687 transitions, 13658 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-20 16:53:58,022 INFO L231 Difference]: Finished difference. Result has 408 places, 666 transitions, 11969 flow [2024-06-20 16:53:58,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11784, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11969, PETRI_PLACES=408, PETRI_TRANSITIONS=666} [2024-06-20 16:53:58,023 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 367 predicate places. [2024-06-20 16:53:58,023 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 666 transitions, 11969 flow [2024-06-20 16:53:58,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:58,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:58,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:58,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:53:58,023 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)] === [2024-06-20 16:53:58,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:58,024 INFO L85 PathProgramCache]: Analyzing trace with hash 682518875, now seen corresponding path program 13 times [2024-06-20 16:53:58,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:58,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002949336] [2024-06-20 16:53:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:58,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:58,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:58,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002949336] [2024-06-20 16:53:58,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002949336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:58,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:58,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:58,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135160569] [2024-06-20 16:53:58,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:58,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:58,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:58,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:58,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:53:58,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 666 transitions, 11969 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:53:58,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:58,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:53:58,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:00,641 INFO L124 PetriNetUnfolderBase]: 4523/6728 cut-off events. [2024-06-20 16:54:00,641 INFO L125 PetriNetUnfolderBase]: For 1061493/1061493 co-relation queries the response was YES. [2024-06-20 16:54:00,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70186 conditions, 6728 events. 4523/6728 cut-off events. For 1061493/1061493 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 36426 event pairs, 1260 based on Foata normal form. 18/6744 useless extension candidates. Maximal degree in co-relation 70003. Up to 6328 conditions per place. [2024-06-20 16:54:00,753 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 624 selfloop transitions, 83 changer transitions 0/710 dead transitions. [2024-06-20 16:54:00,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 710 transitions, 14232 flow [2024-06-20 16:54:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:00,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 16:54:00,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:54:00,754 INFO L175 Difference]: Start difference. First operand has 408 places, 666 transitions, 11969 flow. Second operand 9 states and 150 transitions. [2024-06-20 16:54:00,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 710 transitions, 14232 flow [2024-06-20 16:54:03,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 710 transitions, 13978 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-20 16:54:03,926 INFO L231 Difference]: Finished difference. Result has 411 places, 686 transitions, 12376 flow [2024-06-20 16:54:03,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11715, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12376, PETRI_PLACES=411, PETRI_TRANSITIONS=686} [2024-06-20 16:54:03,927 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-20 16:54:03,927 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 686 transitions, 12376 flow [2024-06-20 16:54:03,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:03,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:03,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:03,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:54:03,927 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)] === [2024-06-20 16:54:03,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:03,928 INFO L85 PathProgramCache]: Analyzing trace with hash 179813219, now seen corresponding path program 9 times [2024-06-20 16:54:03,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:03,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085353110] [2024-06-20 16:54:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:03,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:04,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:04,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085353110] [2024-06-20 16:54:04,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085353110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:04,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:04,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:04,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513120943] [2024-06-20 16:54:04,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:04,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:04,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:04,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:04,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:04,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:54:04,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 686 transitions, 12376 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:04,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:04,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:54:04,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:06,456 INFO L124 PetriNetUnfolderBase]: 4507/6706 cut-off events. [2024-06-20 16:54:06,456 INFO L125 PetriNetUnfolderBase]: For 1025054/1025054 co-relation queries the response was YES. [2024-06-20 16:54:06,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70526 conditions, 6706 events. 4507/6706 cut-off events. For 1025054/1025054 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 36387 event pairs, 1292 based on Foata normal form. 4/6708 useless extension candidates. Maximal degree in co-relation 70341. Up to 6565 conditions per place. [2024-06-20 16:54:06,574 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 657 selfloop transitions, 43 changer transitions 0/703 dead transitions. [2024-06-20 16:54:06,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 703 transitions, 13852 flow [2024-06-20 16:54:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:54:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:54:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-20 16:54:06,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-20 16:54:06,575 INFO L175 Difference]: Start difference. First operand has 411 places, 686 transitions, 12376 flow. Second operand 8 states and 122 transitions. [2024-06-20 16:54:06,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 703 transitions, 13852 flow [2024-06-20 16:54:09,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 703 transitions, 13613 flow, removed 101 selfloop flow, removed 4 redundant places. [2024-06-20 16:54:09,383 INFO L231 Difference]: Finished difference. Result has 415 places, 686 transitions, 12237 flow [2024-06-20 16:54:09,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12137, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12237, PETRI_PLACES=415, PETRI_TRANSITIONS=686} [2024-06-20 16:54:09,384 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 374 predicate places. [2024-06-20 16:54:09,384 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 686 transitions, 12237 flow [2024-06-20 16:54:09,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:09,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:09,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:09,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:54:09,384 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:54:09,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:09,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2503139, now seen corresponding path program 10 times [2024-06-20 16:54:09,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:09,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020328831] [2024-06-20 16:54:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:09,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:10,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:10,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020328831] [2024-06-20 16:54:10,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020328831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:10,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:10,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:10,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475610166] [2024-06-20 16:54:10,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:10,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:10,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:10,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:10,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:10,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:54:10,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 686 transitions, 12237 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:10,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:10,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:54:10,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:11,953 INFO L124 PetriNetUnfolderBase]: 4517/6714 cut-off events. [2024-06-20 16:54:11,954 INFO L125 PetriNetUnfolderBase]: For 1030902/1030906 co-relation queries the response was YES. [2024-06-20 16:54:12,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70494 conditions, 6714 events. 4517/6714 cut-off events. For 1030902/1030906 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 36339 event pairs, 1085 based on Foata normal form. 6/6718 useless extension candidates. Maximal degree in co-relation 70307. Up to 6639 conditions per place. [2024-06-20 16:54:12,061 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 669 selfloop transitions, 32 changer transitions 0/704 dead transitions. [2024-06-20 16:54:12,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 704 transitions, 13769 flow [2024-06-20 16:54:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:54:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:54:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-20 16:54:12,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-20 16:54:12,062 INFO L175 Difference]: Start difference. First operand has 415 places, 686 transitions, 12237 flow. Second operand 7 states and 109 transitions. [2024-06-20 16:54:12,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 704 transitions, 13769 flow [2024-06-20 16:54:15,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 704 transitions, 13695 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 16:54:15,242 INFO L231 Difference]: Finished difference. Result has 416 places, 689 transitions, 12313 flow [2024-06-20 16:54:15,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12163, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12313, PETRI_PLACES=416, PETRI_TRANSITIONS=689} [2024-06-20 16:54:15,243 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 375 predicate places. [2024-06-20 16:54:15,243 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 689 transitions, 12313 flow [2024-06-20 16:54:15,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:15,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:15,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:15,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:54:15,244 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:54:15,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:15,244 INFO L85 PathProgramCache]: Analyzing trace with hash 179397137, now seen corresponding path program 14 times [2024-06-20 16:54:15,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:15,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154108048] [2024-06-20 16:54:15,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:15,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:15,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:15,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154108048] [2024-06-20 16:54:15,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154108048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:15,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:15,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:15,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158537576] [2024-06-20 16:54:15,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:15,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:15,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:16,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:54:16,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 689 transitions, 12313 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:16,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:16,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:54:16,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:18,154 INFO L124 PetriNetUnfolderBase]: 4691/6951 cut-off events. [2024-06-20 16:54:18,154 INFO L125 PetriNetUnfolderBase]: For 1152495/1152499 co-relation queries the response was YES. [2024-06-20 16:54:18,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73560 conditions, 6951 events. 4691/6951 cut-off events. For 1152495/1152499 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37466 event pairs, 708 based on Foata normal form. 22/6971 useless extension candidates. Maximal degree in co-relation 73372. Up to 5729 conditions per place. [2024-06-20 16:54:18,252 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 559 selfloop transitions, 188 changer transitions 0/750 dead transitions. [2024-06-20 16:54:18,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 750 transitions, 14940 flow [2024-06-20 16:54:18,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:54:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:54:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 16:54:18,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-20 16:54:18,253 INFO L175 Difference]: Start difference. First operand has 416 places, 689 transitions, 12313 flow. Second operand 8 states and 155 transitions. [2024-06-20 16:54:18,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 750 transitions, 14940 flow [2024-06-20 16:54:21,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 750 transitions, 14832 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:54:21,364 INFO L231 Difference]: Finished difference. Result has 422 places, 715 transitions, 13388 flow [2024-06-20 16:54:21,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12205, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13388, PETRI_PLACES=422, PETRI_TRANSITIONS=715} [2024-06-20 16:54:21,365 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-20 16:54:21,365 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 715 transitions, 13388 flow [2024-06-20 16:54:21,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:21,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:21,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:21,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:54:21,365 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:54:21,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:21,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1892984047, now seen corresponding path program 11 times [2024-06-20 16:54:21,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:21,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812744564] [2024-06-20 16:54:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:21,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:22,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:22,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812744564] [2024-06-20 16:54:22,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812744564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:22,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:22,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:22,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101627012] [2024-06-20 16:54:22,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:22,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:22,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:22,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:22,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:22,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:54:22,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 715 transitions, 13388 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:22,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:22,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:54:22,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:24,046 INFO L124 PetriNetUnfolderBase]: 4695/6967 cut-off events. [2024-06-20 16:54:24,046 INFO L125 PetriNetUnfolderBase]: For 1120918/1120922 co-relation queries the response was YES. [2024-06-20 16:54:24,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75757 conditions, 6967 events. 4695/6967 cut-off events. For 1120918/1120922 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 37833 event pairs, 1098 based on Foata normal form. 8/6973 useless extension candidates. Maximal degree in co-relation 75566. Up to 6637 conditions per place. [2024-06-20 16:54:24,167 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 649 selfloop transitions, 92 changer transitions 0/744 dead transitions. [2024-06-20 16:54:24,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 744 transitions, 15430 flow [2024-06-20 16:54:24,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:54:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:54:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:54:24,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-20 16:54:24,168 INFO L175 Difference]: Start difference. First operand has 422 places, 715 transitions, 13388 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:54:24,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 744 transitions, 15430 flow [2024-06-20 16:54:28,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 744 transitions, 15139 flow, removed 116 selfloop flow, removed 3 redundant places. [2024-06-20 16:54:28,017 INFO L231 Difference]: Finished difference. Result has 427 places, 718 transitions, 13374 flow [2024-06-20 16:54:28,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13097, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13374, PETRI_PLACES=427, PETRI_TRANSITIONS=718} [2024-06-20 16:54:28,017 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-20 16:54:28,018 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 718 transitions, 13374 flow [2024-06-20 16:54:28,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:28,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:28,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:28,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:54:28,018 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:54:28,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:28,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2265617, now seen corresponding path program 15 times [2024-06-20 16:54:28,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:28,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752518461] [2024-06-20 16:54:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:28,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:28,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:28,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752518461] [2024-06-20 16:54:28,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752518461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:28,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:28,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:28,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398019707] [2024-06-20 16:54:28,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:28,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:28,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:28,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:28,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:28,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:54:28,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 718 transitions, 13374 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:28,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:28,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:54:28,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:30,745 INFO L124 PetriNetUnfolderBase]: 4713/6982 cut-off events. [2024-06-20 16:54:30,746 INFO L125 PetriNetUnfolderBase]: For 1138499/1138503 co-relation queries the response was YES. [2024-06-20 16:54:30,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75588 conditions, 6982 events. 4713/6982 cut-off events. For 1138499/1138503 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 37670 event pairs, 755 based on Foata normal form. 10/6990 useless extension candidates. Maximal degree in co-relation 75395. Up to 6549 conditions per place. [2024-06-20 16:54:30,856 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 628 selfloop transitions, 118 changer transitions 0/749 dead transitions. [2024-06-20 16:54:30,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 749 transitions, 15283 flow [2024-06-20 16:54:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:54:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:54:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:54:30,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-20 16:54:30,857 INFO L175 Difference]: Start difference. First operand has 427 places, 718 transitions, 13374 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:54:30,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 749 transitions, 15283 flow [2024-06-20 16:54:34,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 749 transitions, 15073 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-20 16:54:34,360 INFO L231 Difference]: Finished difference. Result has 431 places, 722 transitions, 13611 flow [2024-06-20 16:54:34,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13164, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13611, PETRI_PLACES=431, PETRI_TRANSITIONS=722} [2024-06-20 16:54:34,361 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-20 16:54:34,361 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 722 transitions, 13611 flow [2024-06-20 16:54:34,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:34,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:34,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:34,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:54:34,361 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:54:34,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:34,361 INFO L85 PathProgramCache]: Analyzing trace with hash 172963397, now seen corresponding path program 16 times [2024-06-20 16:54:34,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:34,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652371693] [2024-06-20 16:54:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:34,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:35,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:35,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652371693] [2024-06-20 16:54:35,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652371693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:35,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:35,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:35,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665514053] [2024-06-20 16:54:35,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:35,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:35,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:35,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:35,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:35,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:54:35,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 722 transitions, 13611 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:35,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:35,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:54:35,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:36,919 INFO L124 PetriNetUnfolderBase]: 4724/7000 cut-off events. [2024-06-20 16:54:36,919 INFO L125 PetriNetUnfolderBase]: For 1153448/1153456 co-relation queries the response was YES. [2024-06-20 16:54:37,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76059 conditions, 7000 events. 4724/7000 cut-off events. For 1153448/1153456 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 37893 event pairs, 781 based on Foata normal form. 14/7012 useless extension candidates. Maximal degree in co-relation 75864. Up to 6726 conditions per place. [2024-06-20 16:54:37,038 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 666 selfloop transitions, 86 changer transitions 0/755 dead transitions. [2024-06-20 16:54:37,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 755 transitions, 15344 flow [2024-06-20 16:54:37,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:54:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:54:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:54:37,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-20 16:54:37,039 INFO L175 Difference]: Start difference. First operand has 431 places, 722 transitions, 13611 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:54:37,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 755 transitions, 15344 flow [2024-06-20 16:54:41,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 755 transitions, 15084 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-20 16:54:41,243 INFO L231 Difference]: Finished difference. Result has 434 places, 729 transitions, 13708 flow [2024-06-20 16:54:41,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13367, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13708, PETRI_PLACES=434, PETRI_TRANSITIONS=729} [2024-06-20 16:54:41,243 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-20 16:54:41,243 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 729 transitions, 13708 flow [2024-06-20 16:54:41,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:41,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:41,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:41,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:54:41,244 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)] === [2024-06-20 16:54:41,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:41,244 INFO L85 PathProgramCache]: Analyzing trace with hash 172968419, now seen corresponding path program 12 times [2024-06-20 16:54:41,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:41,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606364237] [2024-06-20 16:54:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:41,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:41,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:41,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606364237] [2024-06-20 16:54:41,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606364237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:41,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:41,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537776703] [2024-06-20 16:54:41,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:41,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:41,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:41,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:54:41,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 729 transitions, 13708 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:41,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:41,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:54:42,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:43,871 INFO L124 PetriNetUnfolderBase]: 4718/6999 cut-off events. [2024-06-20 16:54:43,871 INFO L125 PetriNetUnfolderBase]: For 1128940/1128944 co-relation queries the response was YES. [2024-06-20 16:54:43,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76327 conditions, 6999 events. 4718/6999 cut-off events. For 1128940/1128944 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 38012 event pairs, 1117 based on Foata normal form. 6/7003 useless extension candidates. Maximal degree in co-relation 76131. Up to 6885 conditions per place. [2024-06-20 16:54:43,991 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 697 selfloop transitions, 48 changer transitions 0/748 dead transitions. [2024-06-20 16:54:43,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 748 transitions, 15280 flow [2024-06-20 16:54:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:54:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:54:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 16:54:43,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 16:54:43,992 INFO L175 Difference]: Start difference. First operand has 434 places, 729 transitions, 13708 flow. Second operand 7 states and 115 transitions. [2024-06-20 16:54:43,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 748 transitions, 15280 flow [2024-06-20 16:54:48,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 748 transitions, 15125 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 16:54:48,045 INFO L231 Difference]: Finished difference. Result has 437 places, 729 transitions, 13655 flow [2024-06-20 16:54:48,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13553, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13655, PETRI_PLACES=437, PETRI_TRANSITIONS=729} [2024-06-20 16:54:48,046 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-20 16:54:48,046 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 729 transitions, 13655 flow [2024-06-20 16:54:48,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:48,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:48,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:48,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:54:48,046 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:54:48,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:48,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1071685633, now seen corresponding path program 3 times [2024-06-20 16:54:48,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:48,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346676576] [2024-06-20 16:54:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:48,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:49,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:49,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346676576] [2024-06-20 16:54:49,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346676576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:49,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:49,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:54:49,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106230161] [2024-06-20 16:54:49,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:49,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:54:49,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:49,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:54:49,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:54:49,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:54:49,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 729 transitions, 13655 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:49,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:49,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:54:49,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:51,428 INFO L124 PetriNetUnfolderBase]: 4726/7016 cut-off events. [2024-06-20 16:54:51,429 INFO L125 PetriNetUnfolderBase]: For 1157065/1157065 co-relation queries the response was YES. [2024-06-20 16:54:51,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76457 conditions, 7016 events. 4726/7016 cut-off events. For 1157065/1157065 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 38121 event pairs, 1368 based on Foata normal form. 2/7016 useless extension candidates. Maximal degree in co-relation 76261. Up to 6955 conditions per place. [2024-06-20 16:54:51,548 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 717 selfloop transitions, 22 changer transitions 0/742 dead transitions. [2024-06-20 16:54:51,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 742 transitions, 15233 flow [2024-06-20 16:54:51,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:51,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-20 16:54:51,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33055555555555555 [2024-06-20 16:54:51,549 INFO L175 Difference]: Start difference. First operand has 437 places, 729 transitions, 13655 flow. Second operand 9 states and 119 transitions. [2024-06-20 16:54:51,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 742 transitions, 15233 flow [2024-06-20 16:54:54,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 742 transitions, 14947 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 16:54:54,849 INFO L231 Difference]: Finished difference. Result has 438 places, 731 transitions, 13490 flow [2024-06-20 16:54:54,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13369, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13490, PETRI_PLACES=438, PETRI_TRANSITIONS=731} [2024-06-20 16:54:54,850 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-20 16:54:54,850 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 731 transitions, 13490 flow [2024-06-20 16:54:54,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:54,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:54,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:54:54,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:54:54,850 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:54:54,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:54,851 INFO L85 PathProgramCache]: Analyzing trace with hash -519929277, now seen corresponding path program 4 times [2024-06-20 16:54:54,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:54,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110842380] [2024-06-20 16:54:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:54,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:56,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:56,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110842380] [2024-06-20 16:54:56,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110842380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:56,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:56,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:54:56,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124008253] [2024-06-20 16:54:56,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:56,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:54:56,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:54:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:54:56,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:54:56,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 731 transitions, 13490 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:54:56,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:56,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:54:56,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:58,288 INFO L124 PetriNetUnfolderBase]: 4734/7028 cut-off events. [2024-06-20 16:54:58,288 INFO L125 PetriNetUnfolderBase]: For 1178893/1178893 co-relation queries the response was YES. [2024-06-20 16:54:58,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76713 conditions, 7028 events. 4734/7028 cut-off events. For 1178893/1178893 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 38189 event pairs, 1343 based on Foata normal form. 2/7028 useless extension candidates. Maximal degree in co-relation 76516. Up to 6953 conditions per place. [2024-06-20 16:54:58,395 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 717 selfloop transitions, 26 changer transitions 0/746 dead transitions. [2024-06-20 16:54:58,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 746 transitions, 15084 flow [2024-06-20 16:54:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:54:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:54:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-20 16:54:58,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3275 [2024-06-20 16:54:58,396 INFO L175 Difference]: Start difference. First operand has 438 places, 731 transitions, 13490 flow. Second operand 10 states and 131 transitions. [2024-06-20 16:54:58,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 746 transitions, 15084 flow [2024-06-20 16:55:01,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 746 transitions, 14883 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-20 16:55:01,448 INFO L231 Difference]: Finished difference. Result has 439 places, 733 transitions, 13422 flow [2024-06-20 16:55:01,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13289, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13422, PETRI_PLACES=439, PETRI_TRANSITIONS=733} [2024-06-20 16:55:01,449 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-20 16:55:01,449 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 733 transitions, 13422 flow [2024-06-20 16:55:01,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:01,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:01,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:01,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:55:01,450 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:01,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:01,450 INFO L85 PathProgramCache]: Analyzing trace with hash -888293041, now seen corresponding path program 5 times [2024-06-20 16:55:01,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:01,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677287209] [2024-06-20 16:55:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:01,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:02,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:02,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677287209] [2024-06-20 16:55:02,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677287209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:02,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:02,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:02,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536280817] [2024-06-20 16:55:02,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:02,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:02,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:02,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:02,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:02,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:55:02,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 733 transitions, 13422 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:02,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:02,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:55:02,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:04,828 INFO L124 PetriNetUnfolderBase]: 4773/7087 cut-off events. [2024-06-20 16:55:04,828 INFO L125 PetriNetUnfolderBase]: For 1247959/1247963 co-relation queries the response was YES. [2024-06-20 16:55:04,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77159 conditions, 7087 events. 4773/7087 cut-off events. For 1247959/1247963 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 38444 event pairs, 990 based on Foata normal form. 18/7103 useless extension candidates. Maximal degree in co-relation 76966. Up to 6791 conditions per place. [2024-06-20 16:55:04,931 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 694 selfloop transitions, 67 changer transitions 0/764 dead transitions. [2024-06-20 16:55:04,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 764 transitions, 15144 flow [2024-06-20 16:55:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:55:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:55:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 16:55:04,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-20 16:55:04,932 INFO L175 Difference]: Start difference. First operand has 439 places, 733 transitions, 13422 flow. Second operand 7 states and 129 transitions. [2024-06-20 16:55:04,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 764 transitions, 15144 flow [2024-06-20 16:55:08,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 764 transitions, 14975 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-20 16:55:08,805 INFO L231 Difference]: Finished difference. Result has 438 places, 734 transitions, 13436 flow [2024-06-20 16:55:08,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13253, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13436, PETRI_PLACES=438, PETRI_TRANSITIONS=734} [2024-06-20 16:55:08,806 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-20 16:55:08,806 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 734 transitions, 13436 flow [2024-06-20 16:55:08,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:08,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:08,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:08,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:55:08,807 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:08,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:08,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2512067, now seen corresponding path program 5 times [2024-06-20 16:55:08,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:08,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658701084] [2024-06-20 16:55:08,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:08,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:09,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:09,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658701084] [2024-06-20 16:55:09,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658701084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:09,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:09,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:09,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600660314] [2024-06-20 16:55:09,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:09,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:09,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:09,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:09,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:55:09,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 734 transitions, 13436 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:09,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:09,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:55:09,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:12,190 INFO L124 PetriNetUnfolderBase]: 4768/7077 cut-off events. [2024-06-20 16:55:12,191 INFO L125 PetriNetUnfolderBase]: For 1201676/1201680 co-relation queries the response was YES. [2024-06-20 16:55:12,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76950 conditions, 7077 events. 4768/7077 cut-off events. For 1201676/1201680 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 38529 event pairs, 1114 based on Foata normal form. 6/7081 useless extension candidates. Maximal degree in co-relation 76756. Up to 6990 conditions per place. [2024-06-20 16:55:12,290 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 711 selfloop transitions, 37 changer transitions 0/751 dead transitions. [2024-06-20 16:55:12,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 751 transitions, 15058 flow [2024-06-20 16:55:12,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:55:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:55:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-20 16:55:12,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-20 16:55:12,291 INFO L175 Difference]: Start difference. First operand has 438 places, 734 transitions, 13436 flow. Second operand 7 states and 111 transitions. [2024-06-20 16:55:12,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 751 transitions, 15058 flow [2024-06-20 16:55:16,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 751 transitions, 14915 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 16:55:16,596 INFO L231 Difference]: Finished difference. Result has 440 places, 736 transitions, 13452 flow [2024-06-20 16:55:16,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13295, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13452, PETRI_PLACES=440, PETRI_TRANSITIONS=736} [2024-06-20 16:55:16,597 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 399 predicate places. [2024-06-20 16:55:16,597 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 736 transitions, 13452 flow [2024-06-20 16:55:16,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:16,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:16,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:16,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:55:16,598 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)] === [2024-06-20 16:55:16,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:16,599 INFO L85 PathProgramCache]: Analyzing trace with hash 564617009, now seen corresponding path program 1 times [2024-06-20 16:55:16,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:16,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850256240] [2024-06-20 16:55:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:16,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:17,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:17,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850256240] [2024-06-20 16:55:17,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850256240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:17,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:17,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:17,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263762420] [2024-06-20 16:55:17,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:17,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:17,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:17,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:17,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:17,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:55:17,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 736 transitions, 13452 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:17,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:17,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:55:17,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:19,614 INFO L124 PetriNetUnfolderBase]: 4908/7281 cut-off events. [2024-06-20 16:55:19,614 INFO L125 PetriNetUnfolderBase]: For 1328930/1328936 co-relation queries the response was YES. [2024-06-20 16:55:19,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79802 conditions, 7281 events. 4908/7281 cut-off events. For 1328930/1328936 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 39684 event pairs, 688 based on Foata normal form. 18/7282 useless extension candidates. Maximal degree in co-relation 79607. Up to 5679 conditions per place. [2024-06-20 16:55:19,754 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 486 selfloop transitions, 307 changer transitions 0/796 dead transitions. [2024-06-20 16:55:19,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 796 transitions, 16495 flow [2024-06-20 16:55:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:55:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:55:19,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:55:19,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-20 16:55:19,755 INFO L175 Difference]: Start difference. First operand has 440 places, 736 transitions, 13452 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:55:19,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 796 transitions, 16495 flow [2024-06-20 16:55:24,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 796 transitions, 16352 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 16:55:24,699 INFO L231 Difference]: Finished difference. Result has 447 places, 756 transitions, 14752 flow [2024-06-20 16:55:24,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13309, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14752, PETRI_PLACES=447, PETRI_TRANSITIONS=756} [2024-06-20 16:55:24,700 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-20 16:55:24,700 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 756 transitions, 14752 flow [2024-06-20 16:55:24,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:24,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:24,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:24,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:55:24,700 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:24,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash 703314577, now seen corresponding path program 2 times [2024-06-20 16:55:24,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:24,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416355442] [2024-06-20 16:55:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:24,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:25,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:25,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416355442] [2024-06-20 16:55:25,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416355442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:25,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:25,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:25,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936384752] [2024-06-20 16:55:25,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:25,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:25,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:25,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:25,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:25,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:55:25,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 756 transitions, 14752 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:25,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:25,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:55:25,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:27,820 INFO L124 PetriNetUnfolderBase]: 4980/7390 cut-off events. [2024-06-20 16:55:27,820 INFO L125 PetriNetUnfolderBase]: For 1381324/1381330 co-relation queries the response was YES. [2024-06-20 16:55:27,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83199 conditions, 7390 events. 4980/7390 cut-off events. For 1381324/1381330 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 40513 event pairs, 820 based on Foata normal form. 20/7392 useless extension candidates. Maximal degree in co-relation 83000. Up to 6070 conditions per place. [2024-06-20 16:55:27,948 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 485 selfloop transitions, 310 changer transitions 0/798 dead transitions. [2024-06-20 16:55:27,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 798 transitions, 17317 flow [2024-06-20 16:55:27,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:55:27,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:55:27,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:55:27,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-20 16:55:27,950 INFO L175 Difference]: Start difference. First operand has 447 places, 756 transitions, 14752 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:55:27,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 798 transitions, 17317 flow [2024-06-20 16:55:32,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 798 transitions, 17087 flow, removed 81 selfloop flow, removed 2 redundant places. [2024-06-20 16:55:32,509 INFO L231 Difference]: Finished difference. Result has 455 places, 766 transitions, 15388 flow [2024-06-20 16:55:32,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14566, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15388, PETRI_PLACES=455, PETRI_TRANSITIONS=766} [2024-06-20 16:55:32,510 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-20 16:55:32,510 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 766 transitions, 15388 flow [2024-06-20 16:55:32,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:32,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:32,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:32,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:55:32,510 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:32,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:32,511 INFO L85 PathProgramCache]: Analyzing trace with hash 700633511, now seen corresponding path program 1 times [2024-06-20 16:55:32,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:32,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092657577] [2024-06-20 16:55:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:32,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:33,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:33,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092657577] [2024-06-20 16:55:33,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092657577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:33,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:33,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:33,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585784645] [2024-06-20 16:55:33,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:33,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:33,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:33,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:33,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:33,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:55:33,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 766 transitions, 15388 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:33,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:33,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:55:33,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:35,897 INFO L124 PetriNetUnfolderBase]: 5026/7464 cut-off events. [2024-06-20 16:55:35,897 INFO L125 PetriNetUnfolderBase]: For 1387371/1387383 co-relation queries the response was YES. [2024-06-20 16:55:35,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85257 conditions, 7464 events. 5026/7464 cut-off events. For 1387371/1387383 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 41204 event pairs, 1101 based on Foata normal form. 12/7469 useless extension candidates. Maximal degree in co-relation 85055. Up to 6650 conditions per place. [2024-06-20 16:55:36,029 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 569 selfloop transitions, 235 changer transitions 0/807 dead transitions. [2024-06-20 16:55:36,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 807 transitions, 18024 flow [2024-06-20 16:55:36,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:55:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:55:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:55:36,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-20 16:55:36,030 INFO L175 Difference]: Start difference. First operand has 455 places, 766 transitions, 15388 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:55:36,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 807 transitions, 18024 flow [2024-06-20 16:55:40,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 807 transitions, 17448 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 16:55:40,686 INFO L231 Difference]: Finished difference. Result has 460 places, 780 transitions, 15656 flow [2024-06-20 16:55:40,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14812, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15656, PETRI_PLACES=460, PETRI_TRANSITIONS=780} [2024-06-20 16:55:40,687 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 419 predicate places. [2024-06-20 16:55:40,687 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 780 transitions, 15656 flow [2024-06-20 16:55:40,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:40,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:40,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:40,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 16:55:40,687 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:40,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:40,688 INFO L85 PathProgramCache]: Analyzing trace with hash 703430021, now seen corresponding path program 2 times [2024-06-20 16:55:40,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:40,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203256299] [2024-06-20 16:55:40,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:40,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:41,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:41,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203256299] [2024-06-20 16:55:41,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203256299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:41,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:41,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:41,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557168901] [2024-06-20 16:55:41,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:41,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:41,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:41,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:41,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:55:41,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 780 transitions, 15656 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:41,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:41,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:55:41,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:44,095 INFO L124 PetriNetUnfolderBase]: 5046/7492 cut-off events. [2024-06-20 16:55:44,096 INFO L125 PetriNetUnfolderBase]: For 1411562/1411574 co-relation queries the response was YES. [2024-06-20 16:55:44,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86312 conditions, 7492 events. 5046/7492 cut-off events. For 1411562/1411574 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 41381 event pairs, 1102 based on Foata normal form. 12/7497 useless extension candidates. Maximal degree in co-relation 86108. Up to 6829 conditions per place. [2024-06-20 16:55:44,230 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 595 selfloop transitions, 210 changer transitions 0/808 dead transitions. [2024-06-20 16:55:44,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 808 transitions, 17910 flow [2024-06-20 16:55:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:55:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:55:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-20 16:55:44,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925 [2024-06-20 16:55:44,231 INFO L175 Difference]: Start difference. First operand has 460 places, 780 transitions, 15656 flow. Second operand 10 states and 157 transitions. [2024-06-20 16:55:44,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 808 transitions, 17910 flow [2024-06-20 16:55:48,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 808 transitions, 17481 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-20 16:55:48,684 INFO L231 Difference]: Finished difference. Result has 466 places, 784 transitions, 15793 flow [2024-06-20 16:55:48,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15255, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15793, PETRI_PLACES=466, PETRI_TRANSITIONS=784} [2024-06-20 16:55:48,684 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 425 predicate places. [2024-06-20 16:55:48,685 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 784 transitions, 15793 flow [2024-06-20 16:55:48,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:48,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:48,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:48,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 16:55:48,685 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:48,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:48,685 INFO L85 PathProgramCache]: Analyzing trace with hash 703429897, now seen corresponding path program 3 times [2024-06-20 16:55:48,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:48,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040358988] [2024-06-20 16:55:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:49,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:49,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040358988] [2024-06-20 16:55:49,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040358988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:49,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:49,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:49,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941496766] [2024-06-20 16:55:49,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:49,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:49,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:49,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:49,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:49,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:55:49,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 784 transitions, 15793 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:49,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:49,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:55:49,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:51,947 INFO L124 PetriNetUnfolderBase]: 5141/7627 cut-off events. [2024-06-20 16:55:51,948 INFO L125 PetriNetUnfolderBase]: For 1506655/1506661 co-relation queries the response was YES. [2024-06-20 16:55:52,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88170 conditions, 7627 events. 5141/7627 cut-off events. For 1506655/1506661 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 42008 event pairs, 830 based on Foata normal form. 20/7629 useless extension candidates. Maximal degree in co-relation 87964. Up to 6412 conditions per place. [2024-06-20 16:55:52,085 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 532 selfloop transitions, 287 changer transitions 0/822 dead transitions. [2024-06-20 16:55:52,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 822 transitions, 18416 flow [2024-06-20 16:55:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:55:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:55:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:55:52,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 16:55:52,086 INFO L175 Difference]: Start difference. First operand has 466 places, 784 transitions, 15793 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:55:52,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 822 transitions, 18416 flow [2024-06-20 16:55:57,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 822 transitions, 18001 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-20 16:55:57,308 INFO L231 Difference]: Finished difference. Result has 469 places, 793 transitions, 16202 flow [2024-06-20 16:55:57,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15378, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16202, PETRI_PLACES=469, PETRI_TRANSITIONS=793} [2024-06-20 16:55:57,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 428 predicate places. [2024-06-20 16:55:57,309 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 793 transitions, 16202 flow [2024-06-20 16:55:57,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:57,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:57,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:57,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 16:55:57,309 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:57,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:57,309 INFO L85 PathProgramCache]: Analyzing trace with hash 818725841, now seen corresponding path program 3 times [2024-06-20 16:55:57,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:57,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590028809] [2024-06-20 16:55:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:57,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:58,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:58,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590028809] [2024-06-20 16:55:58,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590028809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:58,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:58,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:58,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55780400] [2024-06-20 16:55:58,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:58,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:58,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:58,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:58,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:58,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:55:58,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 793 transitions, 16202 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:58,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:58,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:55:58,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:00,790 INFO L124 PetriNetUnfolderBase]: 5161/7665 cut-off events. [2024-06-20 16:56:00,790 INFO L125 PetriNetUnfolderBase]: For 1506968/1506968 co-relation queries the response was YES. [2024-06-20 16:56:00,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89394 conditions, 7665 events. 5161/7665 cut-off events. For 1506968/1506968 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 42579 event pairs, 1391 based on Foata normal form. 4/7667 useless extension candidates. Maximal degree in co-relation 89186. Up to 7482 conditions per place. [2024-06-20 16:56:00,927 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 758 selfloop transitions, 59 changer transitions 0/820 dead transitions. [2024-06-20 16:56:00,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 820 transitions, 18478 flow [2024-06-20 16:56:00,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:56:00,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:56:00,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-20 16:56:00,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825 [2024-06-20 16:56:00,929 INFO L175 Difference]: Start difference. First operand has 469 places, 793 transitions, 16202 flow. Second operand 10 states and 153 transitions. [2024-06-20 16:56:00,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 820 transitions, 18478 flow [2024-06-20 16:56:05,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 820 transitions, 17642 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-20 16:56:05,378 INFO L231 Difference]: Finished difference. Result has 472 places, 797 transitions, 15609 flow [2024-06-20 16:56:05,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15366, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15609, PETRI_PLACES=472, PETRI_TRANSITIONS=797} [2024-06-20 16:56:05,378 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 431 predicate places. [2024-06-20 16:56:05,378 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 797 transitions, 15609 flow [2024-06-20 16:56:05,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:05,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:05,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:05,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 16:56:05,379 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:05,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:05,379 INFO L85 PathProgramCache]: Analyzing trace with hash 818905765, now seen corresponding path program 1 times [2024-06-20 16:56:05,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:05,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292570886] [2024-06-20 16:56:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:05,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:06,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292570886] [2024-06-20 16:56:06,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292570886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:06,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:06,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:06,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765423023] [2024-06-20 16:56:06,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:06,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:06,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:06,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:06,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:06,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:56:06,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 797 transitions, 15609 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:06,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:06,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:56:06,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:08,666 INFO L124 PetriNetUnfolderBase]: 5169/7677 cut-off events. [2024-06-20 16:56:08,666 INFO L125 PetriNetUnfolderBase]: For 1512453/1512453 co-relation queries the response was YES. [2024-06-20 16:56:08,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88373 conditions, 7677 events. 5169/7677 cut-off events. For 1512453/1512453 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 42640 event pairs, 1396 based on Foata normal form. 2/7677 useless extension candidates. Maximal degree in co-relation 88164. Up to 7594 conditions per place. [2024-06-20 16:56:08,808 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 783 selfloop transitions, 29 changer transitions 0/815 dead transitions. [2024-06-20 16:56:08,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 815 transitions, 17357 flow [2024-06-20 16:56:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-20 16:56:08,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36875 [2024-06-20 16:56:08,809 INFO L175 Difference]: Start difference. First operand has 472 places, 797 transitions, 15609 flow. Second operand 8 states and 118 transitions. [2024-06-20 16:56:08,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 815 transitions, 17357 flow [2024-06-20 16:56:13,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 815 transitions, 17170 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-20 16:56:13,377 INFO L231 Difference]: Finished difference. Result has 473 places, 799 transitions, 15547 flow [2024-06-20 16:56:13,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15422, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15547, PETRI_PLACES=473, PETRI_TRANSITIONS=799} [2024-06-20 16:56:13,377 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 432 predicate places. [2024-06-20 16:56:13,377 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 799 transitions, 15547 flow [2024-06-20 16:56:13,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:13,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:13,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:13,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 16:56:13,378 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:13,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:13,378 INFO L85 PathProgramCache]: Analyzing trace with hash 682765263, now seen corresponding path program 4 times [2024-06-20 16:56:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:13,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339309381] [2024-06-20 16:56:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:13,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:14,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:14,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339309381] [2024-06-20 16:56:14,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339309381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:14,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:14,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:14,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184878693] [2024-06-20 16:56:14,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:14,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:14,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:14,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:14,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:14,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:56:14,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 799 transitions, 15547 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:14,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:14,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:56:14,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:16,952 INFO L124 PetriNetUnfolderBase]: 5205/7727 cut-off events. [2024-06-20 16:56:16,952 INFO L125 PetriNetUnfolderBase]: For 1564837/1564837 co-relation queries the response was YES. [2024-06-20 16:56:17,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89241 conditions, 7727 events. 5205/7727 cut-off events. For 1564837/1564837 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 42937 event pairs, 1378 based on Foata normal form. 4/7729 useless extension candidates. Maximal degree in co-relation 89031. Up to 7497 conditions per place. [2024-06-20 16:56:17,095 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 755 selfloop transitions, 74 changer transitions 0/832 dead transitions. [2024-06-20 16:56:17,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 832 transitions, 18178 flow [2024-06-20 16:56:17,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:56:17,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:56:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-20 16:56:17,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-20 16:56:17,096 INFO L175 Difference]: Start difference. First operand has 473 places, 799 transitions, 15547 flow. Second operand 11 states and 168 transitions. [2024-06-20 16:56:17,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 832 transitions, 18178 flow [2024-06-20 16:56:21,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 832 transitions, 18026 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:56:21,714 INFO L231 Difference]: Finished difference. Result has 478 places, 806 transitions, 15768 flow [2024-06-20 16:56:21,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15395, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15768, PETRI_PLACES=478, PETRI_TRANSITIONS=806} [2024-06-20 16:56:21,714 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 437 predicate places. [2024-06-20 16:56:21,715 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 806 transitions, 15768 flow [2024-06-20 16:56:21,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:21,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:21,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:21,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 16:56:21,715 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)] === [2024-06-20 16:56:21,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:21,715 INFO L85 PathProgramCache]: Analyzing trace with hash 682765139, now seen corresponding path program 4 times [2024-06-20 16:56:21,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:21,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992407010] [2024-06-20 16:56:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:21,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:22,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:22,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992407010] [2024-06-20 16:56:22,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992407010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:22,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:22,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:22,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565472914] [2024-06-20 16:56:22,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:22,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:22,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:22,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:22,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:22,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:56:22,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 806 transitions, 15768 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:22,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:22,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:56:22,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:25,256 INFO L124 PetriNetUnfolderBase]: 5309/7887 cut-off events. [2024-06-20 16:56:25,256 INFO L125 PetriNetUnfolderBase]: For 1738331/1738331 co-relation queries the response was YES. [2024-06-20 16:56:25,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91303 conditions, 7887 events. 5309/7887 cut-off events. For 1738331/1738331 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 43973 event pairs, 1405 based on Foata normal form. 28/7913 useless extension candidates. Maximal degree in co-relation 91093. Up to 7628 conditions per place. [2024-06-20 16:56:25,401 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 779 selfloop transitions, 55 changer transitions 0/837 dead transitions. [2024-06-20 16:56:25,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 837 transitions, 17790 flow [2024-06-20 16:56:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:56:25,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:56:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-20 16:56:25,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-20 16:56:25,402 INFO L175 Difference]: Start difference. First operand has 478 places, 806 transitions, 15768 flow. Second operand 10 states and 156 transitions. [2024-06-20 16:56:25,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 837 transitions, 17790 flow [2024-06-20 16:56:30,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 837 transitions, 17612 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-20 16:56:30,268 INFO L231 Difference]: Finished difference. Result has 480 places, 811 transitions, 15885 flow [2024-06-20 16:56:30,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15590, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15885, PETRI_PLACES=480, PETRI_TRANSITIONS=811} [2024-06-20 16:56:30,269 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-20 16:56:30,269 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 811 transitions, 15885 flow [2024-06-20 16:56:30,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:30,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:30,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:30,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 16:56:30,270 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)] === [2024-06-20 16:56:30,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:30,270 INFO L85 PathProgramCache]: Analyzing trace with hash 179643401, now seen corresponding path program 5 times [2024-06-20 16:56:30,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:30,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183332505] [2024-06-20 16:56:30,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:30,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:31,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:31,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183332505] [2024-06-20 16:56:31,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183332505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:31,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:31,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:31,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596061712] [2024-06-20 16:56:31,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:31,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:31,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:31,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:31,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:31,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:56:31,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 811 transitions, 15885 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:31,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:31,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:56:31,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:34,247 INFO L124 PetriNetUnfolderBase]: 5384/8002 cut-off events. [2024-06-20 16:56:34,248 INFO L125 PetriNetUnfolderBase]: For 1738178/1738182 co-relation queries the response was YES. [2024-06-20 16:56:34,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92821 conditions, 8002 events. 5384/8002 cut-off events. For 1738178/1738182 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 44886 event pairs, 1153 based on Foata normal form. 28/8028 useless extension candidates. Maximal degree in co-relation 92610. Up to 7611 conditions per place. [2024-06-20 16:56:34,402 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 759 selfloop transitions, 90 changer transitions 0/852 dead transitions. [2024-06-20 16:56:34,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 852 transitions, 17943 flow [2024-06-20 16:56:34,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:56:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:56:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:56:34,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-20 16:56:34,403 INFO L175 Difference]: Start difference. First operand has 480 places, 811 transitions, 15885 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:56:34,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 852 transitions, 17943 flow [2024-06-20 16:56:39,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 852 transitions, 17788 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 16:56:39,224 INFO L231 Difference]: Finished difference. Result has 483 places, 816 transitions, 16096 flow [2024-06-20 16:56:39,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15730, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16096, PETRI_PLACES=483, PETRI_TRANSITIONS=816} [2024-06-20 16:56:39,225 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 442 predicate places. [2024-06-20 16:56:39,225 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 816 transitions, 16096 flow [2024-06-20 16:56:39,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:39,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:39,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:39,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 16:56:39,226 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)] === [2024-06-20 16:56:39,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:39,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1892341489, now seen corresponding path program 5 times [2024-06-20 16:56:39,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:39,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613289722] [2024-06-20 16:56:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:39,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:40,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:40,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613289722] [2024-06-20 16:56:40,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613289722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:40,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:40,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:40,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649954020] [2024-06-20 16:56:40,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:40,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:40,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:40,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:40,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:40,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:56:40,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 816 transitions, 16096 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:40,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:40,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:56:40,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:42,903 INFO L124 PetriNetUnfolderBase]: 5420/8052 cut-off events. [2024-06-20 16:56:42,904 INFO L125 PetriNetUnfolderBase]: For 1659523/1659527 co-relation queries the response was YES. [2024-06-20 16:56:43,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93838 conditions, 8052 events. 5420/8052 cut-off events. For 1659523/1659527 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 45255 event pairs, 1217 based on Foata normal form. 8/8058 useless extension candidates. Maximal degree in co-relation 93626. Up to 7638 conditions per place. [2024-06-20 16:56:43,053 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 735 selfloop transitions, 119 changer transitions 0/857 dead transitions. [2024-06-20 16:56:43,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 857 transitions, 18835 flow [2024-06-20 16:56:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:56:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:56:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 16:56:43,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:56:43,054 INFO L175 Difference]: Start difference. First operand has 483 places, 816 transitions, 16096 flow. Second operand 10 states and 170 transitions. [2024-06-20 16:56:43,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 857 transitions, 18835 flow [2024-06-20 16:56:47,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 857 transitions, 18615 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-20 16:56:47,859 INFO L231 Difference]: Finished difference. Result has 488 places, 823 transitions, 16347 flow [2024-06-20 16:56:47,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15876, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16347, PETRI_PLACES=488, PETRI_TRANSITIONS=823} [2024-06-20 16:56:47,859 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 447 predicate places. [2024-06-20 16:56:47,860 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 823 transitions, 16347 flow [2024-06-20 16:56:47,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:47,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:47,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:47,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 16:56:47,860 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)] === [2024-06-20 16:56:47,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:47,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1892163859, now seen corresponding path program 6 times [2024-06-20 16:56:47,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:47,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91319458] [2024-06-20 16:56:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:47,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:48,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:48,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91319458] [2024-06-20 16:56:48,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91319458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:48,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:48,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:48,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24860533] [2024-06-20 16:56:48,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:48,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:48,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:48,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:48,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:48,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:56:48,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 823 transitions, 16347 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:48,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:48,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:56:48,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:51,488 INFO L124 PetriNetUnfolderBase]: 5548/8233 cut-off events. [2024-06-20 16:56:51,489 INFO L125 PetriNetUnfolderBase]: For 1774209/1774209 co-relation queries the response was YES. [2024-06-20 16:56:51,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96702 conditions, 8233 events. 5548/8233 cut-off events. For 1774209/1774209 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 46231 event pairs, 1507 based on Foata normal form. 8/8239 useless extension candidates. Maximal degree in co-relation 96489. Up to 8007 conditions per place. [2024-06-20 16:56:51,657 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 809 selfloop transitions, 46 changer transitions 0/858 dead transitions. [2024-06-20 16:56:51,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 858 transitions, 18982 flow [2024-06-20 16:56:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:56:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:56:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 158 transitions. [2024-06-20 16:56:51,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35909090909090907 [2024-06-20 16:56:51,659 INFO L175 Difference]: Start difference. First operand has 488 places, 823 transitions, 16347 flow. Second operand 11 states and 158 transitions. [2024-06-20 16:56:51,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 858 transitions, 18982 flow [2024-06-20 16:56:56,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 858 transitions, 18715 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-20 16:56:56,629 INFO L231 Difference]: Finished difference. Result has 494 places, 836 transitions, 16583 flow [2024-06-20 16:56:56,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16092, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16583, PETRI_PLACES=494, PETRI_TRANSITIONS=836} [2024-06-20 16:56:56,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 453 predicate places. [2024-06-20 16:56:56,629 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 836 transitions, 16583 flow [2024-06-20 16:56:56,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:56,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:56,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:56,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 16:56:56,630 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:56,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:56,631 INFO L85 PathProgramCache]: Analyzing trace with hash -756395355, now seen corresponding path program 2 times [2024-06-20 16:56:56,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:56,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804549883] [2024-06-20 16:56:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:56,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:57,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:57,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804549883] [2024-06-20 16:56:57,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804549883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:57,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:57,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:57,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377229842] [2024-06-20 16:56:57,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:57,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:57,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:57,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:57,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:56:57,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 836 transitions, 16583 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:57,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:57,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:56:57,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:00,119 INFO L124 PetriNetUnfolderBase]: 5556/8244 cut-off events. [2024-06-20 16:57:00,119 INFO L125 PetriNetUnfolderBase]: For 1773053/1773053 co-relation queries the response was YES. [2024-06-20 16:57:00,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97603 conditions, 8244 events. 5556/8244 cut-off events. For 1773053/1773053 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 46271 event pairs, 1454 based on Foata normal form. 2/8244 useless extension candidates. Maximal degree in co-relation 97387. Up to 8155 conditions per place. [2024-06-20 16:57:00,286 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 819 selfloop transitions, 31 changer transitions 0/853 dead transitions. [2024-06-20 16:57:00,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 853 transitions, 18415 flow [2024-06-20 16:57:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:57:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:57:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-20 16:57:00,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821428571428571 [2024-06-20 16:57:00,287 INFO L175 Difference]: Start difference. First operand has 494 places, 836 transitions, 16583 flow. Second operand 7 states and 107 transitions. [2024-06-20 16:57:00,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 853 transitions, 18415 flow [2024-06-20 16:57:05,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 853 transitions, 18094 flow, removed 131 selfloop flow, removed 7 redundant places. [2024-06-20 16:57:05,550 INFO L231 Difference]: Finished difference. Result has 494 places, 838 transitions, 16404 flow [2024-06-20 16:57:05,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16262, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=805, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16404, PETRI_PLACES=494, PETRI_TRANSITIONS=838} [2024-06-20 16:57:05,551 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 453 predicate places. [2024-06-20 16:57:05,551 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 838 transitions, 16404 flow [2024-06-20 16:57:05,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:05,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:05,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:05,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 16:57:05,552 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:05,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:05,552 INFO L85 PathProgramCache]: Analyzing trace with hash 407729249, now seen corresponding path program 3 times [2024-06-20 16:57:05,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:05,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746307938] [2024-06-20 16:57:05,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:05,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:06,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:06,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746307938] [2024-06-20 16:57:06,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746307938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:06,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:06,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:06,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883783023] [2024-06-20 16:57:06,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:06,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:06,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:06,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:06,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:57:06,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 838 transitions, 16404 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:06,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:06,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:57:06,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:09,109 INFO L124 PetriNetUnfolderBase]: 5564/8256 cut-off events. [2024-06-20 16:57:09,109 INFO L125 PetriNetUnfolderBase]: For 1797109/1797109 co-relation queries the response was YES. [2024-06-20 16:57:09,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97192 conditions, 8256 events. 5564/8256 cut-off events. For 1797109/1797109 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 46341 event pairs, 1585 based on Foata normal form. 2/8256 useless extension candidates. Maximal degree in co-relation 96975. Up to 8200 conditions per place. [2024-06-20 16:57:09,277 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 831 selfloop transitions, 18 changer transitions 0/852 dead transitions. [2024-06-20 16:57:09,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 852 transitions, 18216 flow [2024-06-20 16:57:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:57:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:57:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-20 16:57:09,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277777777777778 [2024-06-20 16:57:09,278 INFO L175 Difference]: Start difference. First operand has 494 places, 838 transitions, 16404 flow. Second operand 9 states and 118 transitions. [2024-06-20 16:57:09,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 852 transitions, 18216 flow [2024-06-20 16:57:14,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 852 transitions, 18100 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 16:57:14,480 INFO L231 Difference]: Finished difference. Result has 498 places, 840 transitions, 16405 flow [2024-06-20 16:57:14,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16288, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16405, PETRI_PLACES=498, PETRI_TRANSITIONS=840} [2024-06-20 16:57:14,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2024-06-20 16:57:14,481 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 840 transitions, 16405 flow [2024-06-20 16:57:14,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:14,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:14,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:14,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 16:57:14,481 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:14,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash -520220243, now seen corresponding path program 1 times [2024-06-20 16:57:14,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:14,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729738948] [2024-06-20 16:57:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:14,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:15,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:15,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729738948] [2024-06-20 16:57:15,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729738948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:15,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:15,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:15,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708843824] [2024-06-20 16:57:15,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:15,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:15,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:15,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:57:15,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 840 transitions, 16405 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:15,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:15,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:57:15,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:17,962 INFO L124 PetriNetUnfolderBase]: 5558/8246 cut-off events. [2024-06-20 16:57:17,962 INFO L125 PetriNetUnfolderBase]: For 1810350/1810354 co-relation queries the response was YES. [2024-06-20 16:57:18,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97108 conditions, 8246 events. 5558/8246 cut-off events. For 1810350/1810354 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 46345 event pairs, 1298 based on Foata normal form. 6/8250 useless extension candidates. Maximal degree in co-relation 96890. Up to 7994 conditions per place. [2024-06-20 16:57:18,137 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 779 selfloop transitions, 87 changer transitions 0/869 dead transitions. [2024-06-20 16:57:18,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 869 transitions, 18650 flow [2024-06-20 16:57:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:57:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:57:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 16:57:18,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:57:18,138 INFO L175 Difference]: Start difference. First operand has 498 places, 840 transitions, 16405 flow. Second operand 7 states and 126 transitions. [2024-06-20 16:57:18,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 869 transitions, 18650 flow [2024-06-20 16:57:24,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 869 transitions, 18479 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-20 16:57:24,353 INFO L231 Difference]: Finished difference. Result has 499 places, 846 transitions, 16694 flow [2024-06-20 16:57:24,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16234, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16694, PETRI_PLACES=499, PETRI_TRANSITIONS=846} [2024-06-20 16:57:24,354 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-20 16:57:24,354 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 846 transitions, 16694 flow [2024-06-20 16:57:24,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:24,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:24,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:24,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 16:57:24,355 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:24,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:24,356 INFO L85 PathProgramCache]: Analyzing trace with hash 416003459, now seen corresponding path program 4 times [2024-06-20 16:57:24,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:24,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615142892] [2024-06-20 16:57:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:24,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:25,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:25,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615142892] [2024-06-20 16:57:25,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615142892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:25,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:25,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:25,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939605099] [2024-06-20 16:57:25,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:25,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:25,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:25,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:25,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:25,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:57:25,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 846 transitions, 16694 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:25,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:25,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:57:25,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:28,063 INFO L124 PetriNetUnfolderBase]: 5566/8261 cut-off events. [2024-06-20 16:57:28,063 INFO L125 PetriNetUnfolderBase]: For 1846991/1846991 co-relation queries the response was YES. [2024-06-20 16:57:28,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97835 conditions, 8261 events. 5566/8261 cut-off events. For 1846991/1846991 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 46339 event pairs, 1433 based on Foata normal form. 2/8261 useless extension candidates. Maximal degree in co-relation 97617. Up to 8153 conditions per place. [2024-06-20 16:57:28,222 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 820 selfloop transitions, 38 changer transitions 0/861 dead transitions. [2024-06-20 16:57:28,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 861 transitions, 18538 flow [2024-06-20 16:57:28,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:57:28,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:57:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-20 16:57:28,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:57:28,223 INFO L175 Difference]: Start difference. First operand has 499 places, 846 transitions, 16694 flow. Second operand 6 states and 96 transitions. [2024-06-20 16:57:28,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 861 transitions, 18538 flow [2024-06-20 16:57:34,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 861 transitions, 18363 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-20 16:57:34,443 INFO L231 Difference]: Finished difference. Result has 501 places, 848 transitions, 16689 flow [2024-06-20 16:57:34,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16519, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=16689, PETRI_PLACES=501, PETRI_TRANSITIONS=848} [2024-06-20 16:57:34,444 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 460 predicate places. [2024-06-20 16:57:34,444 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 848 transitions, 16689 flow [2024-06-20 16:57:34,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:34,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:34,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:34,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 16:57:34,444 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:34,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:34,445 INFO L85 PathProgramCache]: Analyzing trace with hash 416300129, now seen corresponding path program 5 times [2024-06-20 16:57:34,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:34,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240726726] [2024-06-20 16:57:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:34,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:35,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:35,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240726726] [2024-06-20 16:57:35,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240726726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:35,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:35,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:35,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773358870] [2024-06-20 16:57:35,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:35,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:35,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:35,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:35,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:35,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:57:35,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 848 transitions, 16689 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:35,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:35,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:57:35,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:38,027 INFO L124 PetriNetUnfolderBase]: 5561/8253 cut-off events. [2024-06-20 16:57:38,027 INFO L125 PetriNetUnfolderBase]: For 1861207/1861207 co-relation queries the response was YES. [2024-06-20 16:57:38,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97668 conditions, 8253 events. 5561/8253 cut-off events. For 1861207/1861207 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 46217 event pairs, 1548 based on Foata normal form. 2/8253 useless extension candidates. Maximal degree in co-relation 97449. Up to 8192 conditions per place. [2024-06-20 16:57:38,181 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 841 selfloop transitions, 16 changer transitions 0/860 dead transitions. [2024-06-20 16:57:38,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 860 transitions, 18513 flow [2024-06-20 16:57:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:57:38,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:57:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-20 16:57:38,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 16:57:38,182 INFO L175 Difference]: Start difference. First operand has 501 places, 848 transitions, 16689 flow. Second operand 6 states and 90 transitions. [2024-06-20 16:57:38,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 860 transitions, 18513 flow [2024-06-20 16:57:44,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 860 transitions, 18365 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-20 16:57:44,564 INFO L231 Difference]: Finished difference. Result has 503 places, 850 transitions, 16662 flow [2024-06-20 16:57:44,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16549, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=16662, PETRI_PLACES=503, PETRI_TRANSITIONS=850} [2024-06-20 16:57:44,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 462 predicate places. [2024-06-20 16:57:44,565 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 850 transitions, 16662 flow [2024-06-20 16:57:44,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:44,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:44,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:44,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 16:57:44,565 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:44,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:44,566 INFO L85 PathProgramCache]: Analyzing trace with hash -789372032, now seen corresponding path program 1 times [2024-06-20 16:57:44,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:44,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385985091] [2024-06-20 16:57:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:44,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:45,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:45,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385985091] [2024-06-20 16:57:45,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385985091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:45,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:45,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:57:45,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574481387] [2024-06-20 16:57:45,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:45,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:57:45,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:45,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:57:45,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:57:45,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:57:45,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 850 transitions, 16662 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:45,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:45,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:57:45,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:48,764 INFO L124 PetriNetUnfolderBase]: 5684/8424 cut-off events. [2024-06-20 16:57:48,764 INFO L125 PetriNetUnfolderBase]: For 1841323/1841327 co-relation queries the response was YES. [2024-06-20 16:57:48,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99453 conditions, 8424 events. 5684/8424 cut-off events. For 1841323/1841327 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 47264 event pairs, 1207 based on Foata normal form. 6/8428 useless extension candidates. Maximal degree in co-relation 99233. Up to 8090 conditions per place. [2024-06-20 16:57:48,921 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 786 selfloop transitions, 137 changer transitions 0/926 dead transitions. [2024-06-20 16:57:48,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 926 transitions, 19992 flow [2024-06-20 16:57:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:57:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:57:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:57:48,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-20 16:57:48,922 INFO L175 Difference]: Start difference. First operand has 503 places, 850 transitions, 16662 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:57:48,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 926 transitions, 19992 flow [2024-06-20 16:57:54,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 926 transitions, 19895 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-20 16:57:54,564 INFO L231 Difference]: Finished difference. Result has 510 places, 894 transitions, 18125 flow [2024-06-20 16:57:54,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16565, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18125, PETRI_PLACES=510, PETRI_TRANSITIONS=894} [2024-06-20 16:57:54,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 469 predicate places. [2024-06-20 16:57:54,565 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 894 transitions, 18125 flow [2024-06-20 16:57:54,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:54,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:54,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:54,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 16:57:54,566 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:54,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:54,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1503053184, now seen corresponding path program 2 times [2024-06-20 16:57:54,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:54,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197947276] [2024-06-20 16:57:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:54,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:55,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:55,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197947276] [2024-06-20 16:57:55,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197947276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:55,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:55,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:55,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531116080] [2024-06-20 16:57:55,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:55,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:55,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:55,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:55,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:57:55,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 894 transitions, 18125 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:55,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:55,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:57:55,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:58,990 INFO L124 PetriNetUnfolderBase]: 5678/8417 cut-off events. [2024-06-20 16:57:58,990 INFO L125 PetriNetUnfolderBase]: For 1863415/1863419 co-relation queries the response was YES. [2024-06-20 16:57:59,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100123 conditions, 8417 events. 5678/8417 cut-off events. For 1863415/1863419 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 47306 event pairs, 1246 based on Foata normal form. 6/8421 useless extension candidates. Maximal degree in co-relation 99900. Up to 8166 conditions per place. [2024-06-20 16:57:59,137 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 805 selfloop transitions, 113 changer transitions 0/921 dead transitions. [2024-06-20 16:57:59,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 921 transitions, 20086 flow [2024-06-20 16:57:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:57:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:57:59,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 16:57:59,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-20 16:57:59,138 INFO L175 Difference]: Start difference. First operand has 510 places, 894 transitions, 18125 flow. Second operand 9 states and 143 transitions. [2024-06-20 16:57:59,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 921 transitions, 20086 flow [2024-06-20 16:58:05,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 921 transitions, 19847 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-20 16:58:05,105 INFO L231 Difference]: Finished difference. Result has 516 places, 895 transitions, 18177 flow [2024-06-20 16:58:05,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17886, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18177, PETRI_PLACES=516, PETRI_TRANSITIONS=895} [2024-06-20 16:58:05,106 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 475 predicate places. [2024-06-20 16:58:05,106 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 895 transitions, 18177 flow [2024-06-20 16:58:05,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:05,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:05,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:05,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 16:58:05,107 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:05,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:05,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1240520853, now seen corresponding path program 1 times [2024-06-20 16:58:05,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:05,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484037321] [2024-06-20 16:58:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:05,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:06,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:06,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484037321] [2024-06-20 16:58:06,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484037321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:06,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:06,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:58:06,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913814850] [2024-06-20 16:58:06,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:06,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:58:06,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:06,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:58:06,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:58:06,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 16:58:06,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 895 transitions, 18177 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-20 16:58:06,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:06,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 16:58:06,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:09,906 INFO L124 PetriNetUnfolderBase]: 5852/8683 cut-off events. [2024-06-20 16:58:09,906 INFO L125 PetriNetUnfolderBase]: For 2011846/2011856 co-relation queries the response was YES. [2024-06-20 16:58:10,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103461 conditions, 8683 events. 5852/8683 cut-off events. For 2011846/2011856 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 48970 event pairs, 1132 based on Foata normal form. 18/8699 useless extension candidates. Maximal degree in co-relation 103236. Up to 7974 conditions per place. [2024-06-20 16:58:10,048 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 809 selfloop transitions, 150 changer transitions 0/962 dead transitions. [2024-06-20 16:58:10,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 962 transitions, 20810 flow [2024-06-20 16:58:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:58:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:58:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-20 16:58:10,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275 [2024-06-20 16:58:10,049 INFO L175 Difference]: Start difference. First operand has 516 places, 895 transitions, 18177 flow. Second operand 10 states and 171 transitions. [2024-06-20 16:58:10,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 962 transitions, 20810 flow [2024-06-20 16:58:16,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 962 transitions, 20555 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 16:58:16,110 INFO L231 Difference]: Finished difference. Result has 523 places, 921 transitions, 18624 flow [2024-06-20 16:58:16,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17922, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18624, PETRI_PLACES=523, PETRI_TRANSITIONS=921} [2024-06-20 16:58:16,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 482 predicate places. [2024-06-20 16:58:16,110 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 921 transitions, 18624 flow [2024-06-20 16:58:16,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-20 16:58:16,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:16,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:16,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 16:58:16,111 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:16,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:16,111 INFO L85 PathProgramCache]: Analyzing trace with hash 264975959, now seen corresponding path program 2 times [2024-06-20 16:58:16,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:16,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164412634] [2024-06-20 16:58:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:16,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:16,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:16,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164412634] [2024-06-20 16:58:16,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164412634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:16,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:16,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:58:16,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644588394] [2024-06-20 16:58:16,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:16,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:58:16,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:16,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:58:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:58:16,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:58:16,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 921 transitions, 18624 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) [2024-06-20 16:58:16,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:16,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:58:16,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:20,534 INFO L124 PetriNetUnfolderBase]: 5887/8845 cut-off events. [2024-06-20 16:58:20,534 INFO L125 PetriNetUnfolderBase]: For 2211315/2211371 co-relation queries the response was YES. [2024-06-20 16:58:20,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109383 conditions, 8845 events. 5887/8845 cut-off events. For 2211315/2211371 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 51574 event pairs, 970 based on Foata normal form. 44/8849 useless extension candidates. Maximal degree in co-relation 109153. Up to 7708 conditions per place. [2024-06-20 16:58:20,718 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 722 selfloop transitions, 152 changer transitions 0/994 dead transitions. [2024-06-20 16:58:20,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 994 transitions, 21298 flow [2024-06-20 16:58:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:58:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:58:20,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:58:20,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:58:20,719 INFO L175 Difference]: Start difference. First operand has 523 places, 921 transitions, 18624 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:58:20,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 994 transitions, 21298 flow [2024-06-20 16:58:27,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 994 transitions, 21163 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-20 16:58:27,851 INFO L231 Difference]: Finished difference. Result has 531 places, 951 transitions, 19283 flow [2024-06-20 16:58:27,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18547, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19283, PETRI_PLACES=531, PETRI_TRANSITIONS=951} [2024-06-20 16:58:27,851 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 490 predicate places. [2024-06-20 16:58:27,851 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 951 transitions, 19283 flow [2024-06-20 16:58:27,852 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) [2024-06-20 16:58:27,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:27,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:27,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 16:58:27,852 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:27,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1503060779, now seen corresponding path program 3 times [2024-06-20 16:58:27,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:27,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683619435] [2024-06-20 16:58:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:27,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:28,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:28,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683619435] [2024-06-20 16:58:28,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683619435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:28,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:28,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:58:28,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918219811] [2024-06-20 16:58:28,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:28,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:58:28,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:28,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:58:28,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:58:28,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:58:28,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 951 transitions, 19283 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) [2024-06-20 16:58:28,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:28,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:58:28,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:32,394 INFO L124 PetriNetUnfolderBase]: 5881/8843 cut-off events. [2024-06-20 16:58:32,395 INFO L125 PetriNetUnfolderBase]: For 2246937/2246995 co-relation queries the response was YES. [2024-06-20 16:58:32,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108227 conditions, 8843 events. 5881/8843 cut-off events. For 2246937/2246995 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 51589 event pairs, 975 based on Foata normal form. 60/8869 useless extension candidates. Maximal degree in co-relation 107994. Up to 7913 conditions per place. [2024-06-20 16:58:32,570 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 704 selfloop transitions, 160 changer transitions 0/984 dead transitions. [2024-06-20 16:58:32,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 984 transitions, 21276 flow [2024-06-20 16:58:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:58:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:58:32,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:58:32,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 16:58:32,571 INFO L175 Difference]: Start difference. First operand has 531 places, 951 transitions, 19283 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:58:32,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 984 transitions, 21276 flow [2024-06-20 16:58:40,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 984 transitions, 21207 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 16:58:40,137 INFO L231 Difference]: Finished difference. Result has 537 places, 953 transitions, 19631 flow [2024-06-20 16:58:40,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19220, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=951, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19631, PETRI_PLACES=537, PETRI_TRANSITIONS=953} [2024-06-20 16:58:40,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 496 predicate places. [2024-06-20 16:58:40,138 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 953 transitions, 19631 flow [2024-06-20 16:58:40,138 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) [2024-06-20 16:58:40,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:40,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:40,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 16:58:40,139 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:40,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:40,139 INFO L85 PathProgramCache]: Analyzing trace with hash 272385269, now seen corresponding path program 4 times [2024-06-20 16:58:40,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:40,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631869303] [2024-06-20 16:58:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:40,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:40,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:40,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631869303] [2024-06-20 16:58:40,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631869303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:40,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:40,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:58:40,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822422669] [2024-06-20 16:58:40,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:40,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:58:40,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:40,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:58:40,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:58:41,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:58:41,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 953 transitions, 19631 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) [2024-06-20 16:58:41,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:41,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:58:41,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:44,523 INFO L124 PetriNetUnfolderBase]: 5865/8819 cut-off events. [2024-06-20 16:58:44,524 INFO L125 PetriNetUnfolderBase]: For 2125295/2125353 co-relation queries the response was YES. [2024-06-20 16:58:44,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107522 conditions, 8819 events. 5865/8819 cut-off events. For 2125295/2125353 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 51375 event pairs, 975 based on Foata normal form. 46/8831 useless extension candidates. Maximal degree in co-relation 107288. Up to 7833 conditions per place. [2024-06-20 16:58:44,698 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 717 selfloop transitions, 152 changer transitions 0/989 dead transitions. [2024-06-20 16:58:44,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 989 transitions, 21600 flow [2024-06-20 16:58:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:58:44,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:58:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:58:44,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 16:58:44,699 INFO L175 Difference]: Start difference. First operand has 537 places, 953 transitions, 19631 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:58:44,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 989 transitions, 21600 flow [2024-06-20 16:58:52,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 989 transitions, 21255 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 16:58:52,075 INFO L231 Difference]: Finished difference. Result has 541 places, 954 transitions, 19628 flow [2024-06-20 16:58:52,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19286, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19628, PETRI_PLACES=541, PETRI_TRANSITIONS=954} [2024-06-20 16:58:52,075 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 500 predicate places. [2024-06-20 16:58:52,076 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 954 transitions, 19628 flow [2024-06-20 16:58:52,076 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) [2024-06-20 16:58:52,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:52,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:52,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 16:58:52,076 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:52,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:52,076 INFO L85 PathProgramCache]: Analyzing trace with hash -518336149, now seen corresponding path program 1 times [2024-06-20 16:58:52,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:52,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636748064] [2024-06-20 16:58:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:52,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat