./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_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/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_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-bcb38a6-m [2024-06-03 20:11:02,025 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:11:02,082 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:11:02,085 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:11:02,086 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:11:02,098 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:11:02,099 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:11:02,099 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:11:02,099 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:11:02,100 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:11:02,100 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:11:02,100 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:11:02,101 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:11:02,101 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:11:02,101 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:11:02,102 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:11:02,102 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:11:02,102 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:11:02,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:11:02,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:11:02,103 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:11:02,106 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:11:02,106 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:11:02,107 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:11:02,107 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:11:02,107 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:11:02,108 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:11:02,108 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:11:02,109 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:11:02,109 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:11:02,109 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:11:02,109 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:11:02,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:11:02,110 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:11:02,110 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:11:02,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:11:02,111 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:11:02,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:11:02,111 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:11:02,112 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:11:02,112 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:11:02,112 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:11:02,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:11:02,113 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:11:02,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:11:02,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:11:02,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:11:02,318 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:11:02,318 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:11:02,319 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-03 20:11:02,442 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:11:02,442 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:11:02,443 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:11:03,578 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:11:03,771 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:11:03,772 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:11:03,790 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9d97acf1/59d38f3b3df940e5bbb929c74d2d3976/FLAG3fa5a9a65 [2024-06-03 20:11:03,800 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9d97acf1/59d38f3b3df940e5bbb929c74d2d3976 [2024-06-03 20:11:03,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:11:03,802 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:11:03,803 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:11:03,803 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:11:03,807 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:11:03,807 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:11:02" (1/2) ... [2024-06-03 20:11:03,808 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b7802a2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:11:03, skipping insertion in model container [2024-06-03 20:11:03,808 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:11:02" (1/2) ... [2024-06-03 20:11:03,809 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7e961d5f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:11:03, skipping insertion in model container [2024-06-03 20:11:03,809 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:11:03" (2/2) ... [2024-06-03 20:11:03,810 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b7802a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:03, skipping insertion in model container [2024-06-03 20:11:03,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:11:03" (2/2) ... [2024-06-03 20:11:03,810 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:11:03,868 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:11:03,870 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] (((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$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 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 20:11:03,870 INFO L97 edCorrectnessWitness]: Location invariant before [L816-L816] (((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 20:11:03,870 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] (((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$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 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 20:11:03,871 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:11:03,871 INFO L106 edCorrectnessWitness]: ghost_update [L814-L814] multithreaded = 1; [2024-06-03 20:11:03,908 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:11:04,297 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:11:04,309 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:11:04,400 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:11:04,430 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:11:04,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04 WrapperNode [2024-06-03 20:11:04,431 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:11:04,432 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:11:04,432 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:11:04,433 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:11:04,438 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04" (1/1) ... [2024-06-03 20:11:04,468 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04" (1/1) ... [2024-06-03 20:11:04,546 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 142 [2024-06-03 20:11:04,546 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:11:04,547 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:11:04,547 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:11:04,547 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:11:04,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04" (1/1) ... [2024-06-03 20:11:04,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04" (1/1) ... [2024-06-03 20:11:04,585 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04" (1/1) ... [2024-06-03 20:11:04,609 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]. [2024-06-03 20:11:04,610 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04" (1/1) ... [2024-06-03 20:11:04,610 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04" (1/1) ... [2024-06-03 20:11:04,623 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04" (1/1) ... [2024-06-03 20:11:04,625 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04" (1/1) ... [2024-06-03 20:11:04,626 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04" (1/1) ... [2024-06-03 20:11:04,628 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04" (1/1) ... [2024-06-03 20:11:04,630 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:11:04,631 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:11:04,631 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:11:04,631 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:11:04,632 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04" (1/1) ... [2024-06-03 20:11:04,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:11:04,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:11:04,670 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) [2024-06-03 20:11:04,676 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 [2024-06-03 20:11:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:11:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:11:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:11:04,705 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:11:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:11:04,705 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:11:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:11:04,705 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:11:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:11:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:11:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:11:04,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:11:04,707 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:11:04,800 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:11:04,802 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:11:05,125 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:11:05,125 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:11:05,280 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:11:05,280 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:11:05,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:11:05 BoogieIcfgContainer [2024-06-03 20:11:05,281 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:11:05,285 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:11:05,285 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:11:05,288 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:11:05,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:11:02" (1/4) ... [2024-06-03 20:11:05,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3852c13 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:11:05, skipping insertion in model container [2024-06-03 20:11:05,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:11:03" (2/4) ... [2024-06-03 20:11:05,290 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3852c13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:11:05, skipping insertion in model container [2024-06-03 20:11:05,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:11:04" (3/4) ... [2024-06-03 20:11:05,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3852c13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:11:05, skipping insertion in model container [2024-06-03 20:11:05,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:11:05" (4/4) ... [2024-06-03 20:11:05,292 INFO L112 eAbstractionObserver]: Analyzing ICFG safe017_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:11:05,306 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:11:05,306 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:11:05,306 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:11:05,347 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:11:05,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-03 20:11:05,403 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-03 20:11:05,404 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:11:05,405 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 59 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. [2024-06-03 20:11:05,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-03 20:11:05,408 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-03 20:11:05,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:11:05,427 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;@532abd34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:11:05,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:11:05,433 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:11:05,433 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-03 20:11:05,433 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:11:05,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:05,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:11:05,435 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)] === [2024-06-03 20:11:05,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:05,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1507050491, now seen corresponding path program 1 times [2024-06-03 20:11:05,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:05,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671964640] [2024-06-03 20:11:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:05,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:06,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:06,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671964640] [2024-06-03 20:11:06,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671964640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:06,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:06,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:11:06,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132856203] [2024-06-03 20:11:06,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:06,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:11:06,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:06,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:11:06,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:11:06,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-03 20:11:06,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:06,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:06,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-03 20:11:06,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:06,721 INFO L124 PetriNetUnfolderBase]: 1156/1754 cut-off events. [2024-06-03 20:11:06,721 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-03 20:11:06,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3583 conditions, 1754 events. 1156/1754 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7866 event pairs, 805 based on Foata normal form. 1/1718 useless extension candidates. Maximal degree in co-relation 3568. Up to 1740 conditions per place. [2024-06-03 20:11:06,733 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 33 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-03 20:11:06,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 171 flow [2024-06-03 20:11:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:11:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:11:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-06-03 20:11:06,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-03 20:11:06,744 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 67 transitions. [2024-06-03 20:11:06,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 171 flow [2024-06-03 20:11:06,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:11:06,748 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-03 20:11:06,750 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} [2024-06-03 20:11:06,752 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-03 20:11:06,752 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-03 20:11:06,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:06,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:06,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:06,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:11:06,753 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)] === [2024-06-03 20:11:06,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:06,754 INFO L85 PathProgramCache]: Analyzing trace with hash -871499996, now seen corresponding path program 1 times [2024-06-03 20:11:06,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:06,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630105144] [2024-06-03 20:11:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:06,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:07,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:07,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630105144] [2024-06-03 20:11:07,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630105144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:07,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:07,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:11:07,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940055099] [2024-06-03 20:11:07,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:07,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:11:07,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:11:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:11:07,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-03 20:11:07,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:07,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:07,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-03 20:11:07,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:07,736 INFO L124 PetriNetUnfolderBase]: 1150/1745 cut-off events. [2024-06-03 20:11:07,736 INFO L125 PetriNetUnfolderBase]: For 338/346 co-relation queries the response was YES. [2024-06-03 20:11:07,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1745 events. 1150/1745 cut-off events. For 338/346 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7766 event pairs, 699 based on Foata normal form. 6/1749 useless extension candidates. Maximal degree in co-relation 4039. Up to 1716 conditions per place. [2024-06-03 20:11:07,746 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-03 20:11:07,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 238 flow [2024-06-03 20:11:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:11:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:11:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-06-03 20:11:07,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-03 20:11:07,750 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 86 transitions. [2024-06-03 20:11:07,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 238 flow [2024-06-03 20:11:07,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:11:07,753 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-03 20:11:07,753 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-03 20:11:07,753 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-03 20:11:07,754 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-03 20:11:07,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:07,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:07,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:07,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:11:07,757 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)] === [2024-06-03 20:11:07,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:07,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1246694692, now seen corresponding path program 1 times [2024-06-03 20:11:07,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:07,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244897512] [2024-06-03 20:11:07,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:07,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:08,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:08,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244897512] [2024-06-03 20:11:08,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244897512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:08,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:08,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:11:08,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569659950] [2024-06-03 20:11:08,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:08,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:11:08,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:08,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:11:08,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:11:08,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-03 20:11:08,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:08,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:08,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-03 20:11:08,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:08,696 INFO L124 PetriNetUnfolderBase]: 1405/2113 cut-off events. [2024-06-03 20:11:08,696 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2024-06-03 20:11:08,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5409 conditions, 2113 events. 1405/2113 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9500 event pairs, 627 based on Foata normal form. 7/2119 useless extension candidates. Maximal degree in co-relation 5392. Up to 1974 conditions per place. [2024-06-03 20:11:08,706 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-03 20:11:08,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 79 transitions, 423 flow [2024-06-03 20:11:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:11:08,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:11:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-03 20:11:08,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-03 20:11:08,708 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 111 transitions. [2024-06-03 20:11:08,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 79 transitions, 423 flow [2024-06-03 20:11:08,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 79 transitions, 402 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 20:11:08,710 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 231 flow [2024-06-03 20:11:08,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2024-06-03 20:11:08,711 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-03 20:11:08,711 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 231 flow [2024-06-03 20:11:08,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:08,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:08,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:08,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:11:08,712 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)] === [2024-06-03 20:11:08,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:08,712 INFO L85 PathProgramCache]: Analyzing trace with hash 7171651, now seen corresponding path program 1 times [2024-06-03 20:11:08,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:08,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564330653] [2024-06-03 20:11:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:08,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:09,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:09,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564330653] [2024-06-03 20:11:09,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564330653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:09,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:09,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:11:09,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457932211] [2024-06-03 20:11:09,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:09,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:11:09,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:09,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:11:09,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:11:09,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-03 20:11:09,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:09,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:09,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-03 20:11:09,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:09,837 INFO L124 PetriNetUnfolderBase]: 1427/2146 cut-off events. [2024-06-03 20:11:09,837 INFO L125 PetriNetUnfolderBase]: For 2513/2515 co-relation queries the response was YES. [2024-06-03 20:11:09,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6651 conditions, 2146 events. 1427/2146 cut-off events. For 2513/2515 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9637 event pairs, 492 based on Foata normal form. 7/2152 useless extension candidates. Maximal degree in co-relation 6631. Up to 1917 conditions per place. [2024-06-03 20:11:09,849 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 73 selfloop transitions, 26 changer transitions 0/102 dead transitions. [2024-06-03 20:11:09,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 102 transitions, 627 flow [2024-06-03 20:11:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:11:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:11:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-03 20:11:09,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-03 20:11:09,851 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 231 flow. Second operand 6 states and 134 transitions. [2024-06-03 20:11:09,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 102 transitions, 627 flow [2024-06-03 20:11:09,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 102 transitions, 623 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-03 20:11:09,856 INFO L231 Difference]: Finished difference. Result has 58 places, 63 transitions, 392 flow [2024-06-03 20:11:09,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=58, PETRI_TRANSITIONS=63} [2024-06-03 20:11:09,856 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-03 20:11:09,857 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 63 transitions, 392 flow [2024-06-03 20:11:09,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:09,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:09,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:09,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:11:09,857 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:09,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:09,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1080602535, now seen corresponding path program 1 times [2024-06-03 20:11:09,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:09,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916939395] [2024-06-03 20:11:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:09,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:10,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:10,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916939395] [2024-06-03 20:11:10,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916939395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:10,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:10,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:11:10,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060484772] [2024-06-03 20:11:10,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:10,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:11:10,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:10,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:11:10,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:11:10,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-03 20:11:10,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 63 transitions, 392 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:10,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:10,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-03 20:11:10,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:11,107 INFO L124 PetriNetUnfolderBase]: 1544/2348 cut-off events. [2024-06-03 20:11:11,107 INFO L125 PetriNetUnfolderBase]: For 5169/5171 co-relation queries the response was YES. [2024-06-03 20:11:11,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8510 conditions, 2348 events. 1544/2348 cut-off events. For 5169/5171 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10918 event pairs, 360 based on Foata normal form. 32/2379 useless extension candidates. Maximal degree in co-relation 8484. Up to 1947 conditions per place. [2024-06-03 20:11:11,123 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 91 selfloop transitions, 20 changer transitions 0/114 dead transitions. [2024-06-03 20:11:11,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 114 transitions, 805 flow [2024-06-03 20:11:11,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 20:11:11,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:11:11,126 INFO L175 Difference]: Start difference. First operand has 58 places, 63 transitions, 392 flow. Second operand 7 states and 150 transitions. [2024-06-03 20:11:11,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 114 transitions, 805 flow [2024-06-03 20:11:11,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 114 transitions, 791 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-03 20:11:11,137 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 467 flow [2024-06-03 20:11:11,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=467, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-06-03 20:11:11,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-03 20:11:11,139 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 467 flow [2024-06-03 20:11:11,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:11,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:11,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:11,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:11:11,140 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)] === [2024-06-03 20:11:11,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:11,141 INFO L85 PathProgramCache]: Analyzing trace with hash -674294270, now seen corresponding path program 1 times [2024-06-03 20:11:11,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:11,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740206553] [2024-06-03 20:11:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:11,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:11,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740206553] [2024-06-03 20:11:11,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740206553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:11,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:11,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:11:11,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818149856] [2024-06-03 20:11:11,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:11,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:11:11,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:11,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:11:11,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:11:11,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:11,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 467 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:11,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:11,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:11,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:12,183 INFO L124 PetriNetUnfolderBase]: 1534/2333 cut-off events. [2024-06-03 20:11:12,183 INFO L125 PetriNetUnfolderBase]: For 6510/6510 co-relation queries the response was YES. [2024-06-03 20:11:12,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9057 conditions, 2333 events. 1534/2333 cut-off events. For 6510/6510 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10788 event pairs, 549 based on Foata normal form. 4/2336 useless extension candidates. Maximal degree in co-relation 9027. Up to 2302 conditions per place. [2024-06-03 20:11:12,196 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 67 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-03 20:11:12,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 663 flow [2024-06-03 20:11:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:11:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:11:12,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-03 20:11:12,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-03 20:11:12,197 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 467 flow. Second operand 5 states and 82 transitions. [2024-06-03 20:11:12,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 663 flow [2024-06-03 20:11:12,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 625 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:12,204 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 479 flow [2024-06-03 20:11:12,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=479, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-03 20:11:12,205 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-03 20:11:12,205 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 479 flow [2024-06-03 20:11:12,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:12,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:12,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:12,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:11:12,205 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)] === [2024-06-03 20:11:12,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:12,206 INFO L85 PathProgramCache]: Analyzing trace with hash -492888641, now seen corresponding path program 1 times [2024-06-03 20:11:12,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:12,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003796699] [2024-06-03 20:11:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:12,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:12,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:12,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003796699] [2024-06-03 20:11:12,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003796699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:12,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:12,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:11:12,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300091040] [2024-06-03 20:11:12,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:12,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:11:12,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:12,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:11:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:11:12,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:12,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 479 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:12,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:12,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:12,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:13,201 INFO L124 PetriNetUnfolderBase]: 1546/2352 cut-off events. [2024-06-03 20:11:13,201 INFO L125 PetriNetUnfolderBase]: For 7297/7299 co-relation queries the response was YES. [2024-06-03 20:11:13,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9208 conditions, 2352 events. 1546/2352 cut-off events. For 7297/7299 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10918 event pairs, 467 based on Foata normal form. 10/2361 useless extension candidates. Maximal degree in co-relation 9175. Up to 2200 conditions per place. [2024-06-03 20:11:13,215 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 74 selfloop transitions, 18 changer transitions 0/95 dead transitions. [2024-06-03 20:11:13,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 777 flow [2024-06-03 20:11:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:11:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:11:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-03 20:11:13,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-03 20:11:13,217 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 479 flow. Second operand 6 states and 106 transitions. [2024-06-03 20:11:13,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 777 flow [2024-06-03 20:11:13,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 755 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 20:11:13,226 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 549 flow [2024-06-03 20:11:13,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=549, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-03 20:11:13,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-03 20:11:13,226 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 549 flow [2024-06-03 20:11:13,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:13,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:13,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:13,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:11:13,227 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)] === [2024-06-03 20:11:13,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash 544160869, now seen corresponding path program 2 times [2024-06-03 20:11:13,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:13,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989991375] [2024-06-03 20:11:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:13,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:13,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:13,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989991375] [2024-06-03 20:11:13,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989991375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:13,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:13,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:11:13,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846729720] [2024-06-03 20:11:13,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:13,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:11:13,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:13,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:11:13,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:11:13,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:13,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 549 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:13,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:13,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:13,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:14,253 INFO L124 PetriNetUnfolderBase]: 1504/2273 cut-off events. [2024-06-03 20:11:14,254 INFO L125 PetriNetUnfolderBase]: For 8612/8612 co-relation queries the response was YES. [2024-06-03 20:11:14,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9218 conditions, 2273 events. 1504/2273 cut-off events. For 8612/8612 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10251 event pairs, 505 based on Foata normal form. 4/2276 useless extension candidates. Maximal degree in co-relation 9183. Up to 2233 conditions per place. [2024-06-03 20:11:14,269 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 76 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2024-06-03 20:11:14,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 776 flow [2024-06-03 20:11:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:11:14,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:11:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-03 20:11:14,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 20:11:14,271 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 549 flow. Second operand 6 states and 96 transitions. [2024-06-03 20:11:14,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 776 flow [2024-06-03 20:11:14,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 753 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-03 20:11:14,281 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 569 flow [2024-06-03 20:11:14,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=569, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-03 20:11:14,282 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-03 20:11:14,282 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 569 flow [2024-06-03 20:11:14,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:14,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:14,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:14,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:11:14,282 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)] === [2024-06-03 20:11:14,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:14,283 INFO L85 PathProgramCache]: Analyzing trace with hash -487166785, now seen corresponding path program 1 times [2024-06-03 20:11:14,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:14,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808250647] [2024-06-03 20:11:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:14,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:15,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:15,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808250647] [2024-06-03 20:11:15,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808250647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:15,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:15,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:11:15,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359458867] [2024-06-03 20:11:15,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:15,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:11:15,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:15,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:11:15,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:11:15,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:15,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 569 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) [2024-06-03 20:11:15,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:15,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:15,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:15,822 INFO L124 PetriNetUnfolderBase]: 1496/2261 cut-off events. [2024-06-03 20:11:15,823 INFO L125 PetriNetUnfolderBase]: For 9804/9804 co-relation queries the response was YES. [2024-06-03 20:11:15,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9313 conditions, 2261 events. 1496/2261 cut-off events. For 9804/9804 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10228 event pairs, 486 based on Foata normal form. 4/2264 useless extension candidates. Maximal degree in co-relation 9277. Up to 2212 conditions per place. [2024-06-03 20:11:15,834 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 77 selfloop transitions, 12 changer transitions 0/92 dead transitions. [2024-06-03 20:11:15,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 92 transitions, 803 flow [2024-06-03 20:11:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:11:15,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:11:15,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-03 20:11:15,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 20:11:15,836 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 569 flow. Second operand 6 states and 96 transitions. [2024-06-03 20:11:15,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 92 transitions, 803 flow [2024-06-03 20:11:15,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 92 transitions, 779 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:15,846 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 596 flow [2024-06-03 20:11:15,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=596, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-06-03 20:11:15,847 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-03 20:11:15,847 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 596 flow [2024-06-03 20:11:15,847 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) [2024-06-03 20:11:15,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:15,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:15,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:11:15,848 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)] === [2024-06-03 20:11:15,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:15,848 INFO L85 PathProgramCache]: Analyzing trace with hash -599087197, now seen corresponding path program 1 times [2024-06-03 20:11:15,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:15,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078732556] [2024-06-03 20:11:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:15,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:16,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:16,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078732556] [2024-06-03 20:11:16,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078732556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:16,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:16,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:11:16,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327265567] [2024-06-03 20:11:16,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:16,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:11:16,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:16,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:11:16,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:11:16,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:16,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 596 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) [2024-06-03 20:11:16,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:16,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:16,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:17,154 INFO L124 PetriNetUnfolderBase]: 1491/2254 cut-off events. [2024-06-03 20:11:17,154 INFO L125 PetriNetUnfolderBase]: For 11240/11240 co-relation queries the response was YES. [2024-06-03 20:11:17,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9574 conditions, 2254 events. 1491/2254 cut-off events. For 11240/11240 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10219 event pairs, 499 based on Foata normal form. 2/2255 useless extension candidates. Maximal degree in co-relation 9538. Up to 2196 conditions per place. [2024-06-03 20:11:17,168 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 73 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2024-06-03 20:11:17,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 92 transitions, 816 flow [2024-06-03 20:11:17,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:11:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:11:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-03 20:11:17,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-03 20:11:17,171 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 596 flow. Second operand 6 states and 97 transitions. [2024-06-03 20:11:17,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 92 transitions, 816 flow [2024-06-03 20:11:17,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 783 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:17,182 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 607 flow [2024-06-03 20:11:17,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=607, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-06-03 20:11:17,183 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-03 20:11:17,183 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 607 flow [2024-06-03 20:11:17,183 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) [2024-06-03 20:11:17,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:17,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:17,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:11:17,184 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)] === [2024-06-03 20:11:17,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:17,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1539740350, now seen corresponding path program 1 times [2024-06-03 20:11:17,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:17,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387525132] [2024-06-03 20:11:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:17,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:18,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:18,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387525132] [2024-06-03 20:11:18,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387525132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:18,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:18,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:11:18,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072526877] [2024-06-03 20:11:18,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:18,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:11:18,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:11:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:11:18,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:18,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 607 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:18,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:18,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:18,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:18,627 INFO L124 PetriNetUnfolderBase]: 1481/2241 cut-off events. [2024-06-03 20:11:18,628 INFO L125 PetriNetUnfolderBase]: For 12992/12994 co-relation queries the response was YES. [2024-06-03 20:11:18,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9683 conditions, 2241 events. 1481/2241 cut-off events. For 12992/12994 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10170 event pairs, 417 based on Foata normal form. 6/2246 useless extension candidates. Maximal degree in co-relation 9646. Up to 2035 conditions per place. [2024-06-03 20:11:18,641 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 83 selfloop transitions, 26 changer transitions 0/112 dead transitions. [2024-06-03 20:11:18,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 112 transitions, 935 flow [2024-06-03 20:11:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:18,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:11:18,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-03 20:11:18,643 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 607 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:11:18,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 112 transitions, 935 flow [2024-06-03 20:11:18,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 893 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:18,656 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 652 flow [2024-06-03 20:11:18,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=652, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-06-03 20:11:18,657 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-03 20:11:18,657 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 652 flow [2024-06-03 20:11:18,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:18,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:18,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:18,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:11:18,658 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)] === [2024-06-03 20:11:18,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1535925118, now seen corresponding path program 1 times [2024-06-03 20:11:18,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:18,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600667261] [2024-06-03 20:11:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:18,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:19,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:19,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600667261] [2024-06-03 20:11:19,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600667261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:19,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:19,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:19,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148671041] [2024-06-03 20:11:19,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:19,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:19,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:19,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:19,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:19,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:19,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 652 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) [2024-06-03 20:11:19,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:19,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:19,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:20,005 INFO L124 PetriNetUnfolderBase]: 1515/2295 cut-off events. [2024-06-03 20:11:20,005 INFO L125 PetriNetUnfolderBase]: For 15604/15606 co-relation queries the response was YES. [2024-06-03 20:11:20,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10422 conditions, 2295 events. 1515/2295 cut-off events. For 15604/15606 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10499 event pairs, 424 based on Foata normal form. 10/2304 useless extension candidates. Maximal degree in co-relation 10384. Up to 2119 conditions per place. [2024-06-03 20:11:20,021 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 82 selfloop transitions, 22 changer transitions 0/107 dead transitions. [2024-06-03 20:11:20,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 107 transitions, 952 flow [2024-06-03 20:11:20,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-03 20:11:20,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-03 20:11:20,024 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 652 flow. Second operand 7 states and 119 transitions. [2024-06-03 20:11:20,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 107 transitions, 952 flow [2024-06-03 20:11:20,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 107 transitions, 891 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 20:11:20,041 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 675 flow [2024-06-03 20:11:20,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2024-06-03 20:11:20,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-03 20:11:20,042 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 675 flow [2024-06-03 20:11:20,042 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) [2024-06-03 20:11:20,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:20,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:20,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:11:20,043 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)] === [2024-06-03 20:11:20,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:20,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1878548224, now seen corresponding path program 2 times [2024-06-03 20:11:20,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:20,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151110580] [2024-06-03 20:11:20,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:20,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:20,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:20,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151110580] [2024-06-03 20:11:20,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151110580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:20,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:20,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:20,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14694746] [2024-06-03 20:11:20,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:20,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:20,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:20,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:20,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:21,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:21,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 675 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) [2024-06-03 20:11:21,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:21,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:21,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:21,506 INFO L124 PetriNetUnfolderBase]: 1532/2321 cut-off events. [2024-06-03 20:11:21,506 INFO L125 PetriNetUnfolderBase]: For 18036/18036 co-relation queries the response was YES. [2024-06-03 20:11:21,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10931 conditions, 2321 events. 1532/2321 cut-off events. For 18036/18036 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10550 event pairs, 484 based on Foata normal form. 4/2324 useless extension candidates. Maximal degree in co-relation 10892. Up to 2263 conditions per place. [2024-06-03 20:11:21,519 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 89 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2024-06-03 20:11:21,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 105 transitions, 957 flow [2024-06-03 20:11:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-03 20:11:21,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 20:11:21,521 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 675 flow. Second operand 7 states and 110 transitions. [2024-06-03 20:11:21,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 105 transitions, 957 flow [2024-06-03 20:11:21,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 105 transitions, 897 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:21,538 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 676 flow [2024-06-03 20:11:21,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=676, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2024-06-03 20:11:21,539 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-03 20:11:21,539 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 676 flow [2024-06-03 20:11:21,539 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) [2024-06-03 20:11:21,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:21,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:21,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:11:21,539 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)] === [2024-06-03 20:11:21,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash -15817378, now seen corresponding path program 3 times [2024-06-03 20:11:21,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:21,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730267461] [2024-06-03 20:11:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:21,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:22,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:22,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730267461] [2024-06-03 20:11:22,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730267461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:22,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:22,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:22,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411428575] [2024-06-03 20:11:22,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:22,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:22,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:22,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:22,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:22,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:22,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 676 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) [2024-06-03 20:11:22,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:22,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:22,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:22,836 INFO L124 PetriNetUnfolderBase]: 1549/2348 cut-off events. [2024-06-03 20:11:22,836 INFO L125 PetriNetUnfolderBase]: For 20789/20789 co-relation queries the response was YES. [2024-06-03 20:11:22,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11230 conditions, 2348 events. 1549/2348 cut-off events. For 20789/20789 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10708 event pairs, 464 based on Foata normal form. 4/2351 useless extension candidates. Maximal degree in co-relation 11190. Up to 2276 conditions per place. [2024-06-03 20:11:22,848 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 90 selfloop transitions, 14 changer transitions 0/107 dead transitions. [2024-06-03 20:11:22,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 964 flow [2024-06-03 20:11:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:22,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-03 20:11:22,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 20:11:22,850 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 676 flow. Second operand 7 states and 110 transitions. [2024-06-03 20:11:22,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 964 flow [2024-06-03 20:11:22,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 921 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:22,864 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 700 flow [2024-06-03 20:11:22,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=700, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2024-06-03 20:11:22,865 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-03 20:11:22,865 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 700 flow [2024-06-03 20:11:22,865 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) [2024-06-03 20:11:22,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:22,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:22,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:11:22,866 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)] === [2024-06-03 20:11:22,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:22,866 INFO L85 PathProgramCache]: Analyzing trace with hash -23234345, now seen corresponding path program 1 times [2024-06-03 20:11:22,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:22,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175405841] [2024-06-03 20:11:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:22,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:23,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:23,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175405841] [2024-06-03 20:11:23,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175405841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:23,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:23,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:11:23,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694426093] [2024-06-03 20:11:23,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:23,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:11:23,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:23,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:11:23,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:11:23,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:23,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 700 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:23,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:23,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:23,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:24,063 INFO L124 PetriNetUnfolderBase]: 1541/2337 cut-off events. [2024-06-03 20:11:24,063 INFO L125 PetriNetUnfolderBase]: For 23152/23154 co-relation queries the response was YES. [2024-06-03 20:11:24,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11413 conditions, 2337 events. 1541/2337 cut-off events. For 23152/23154 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10697 event pairs, 442 based on Foata normal form. 2/2338 useless extension candidates. Maximal degree in co-relation 11372. Up to 2170 conditions per place. [2024-06-03 20:11:24,079 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 28 changer transitions 0/109 dead transitions. [2024-06-03 20:11:24,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 109 transitions, 974 flow [2024-06-03 20:11:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:11:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:11:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 20:11:24,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 20:11:24,081 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 700 flow. Second operand 6 states and 108 transitions. [2024-06-03 20:11:24,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 109 transitions, 974 flow [2024-06-03 20:11:24,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 109 transitions, 925 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:24,099 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 722 flow [2024-06-03 20:11:24,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=722, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2024-06-03 20:11:24,099 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-03 20:11:24,099 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 722 flow [2024-06-03 20:11:24,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:24,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:24,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:24,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:11:24,100 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)] === [2024-06-03 20:11:24,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:24,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1871196574, now seen corresponding path program 4 times [2024-06-03 20:11:24,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:24,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110903096] [2024-06-03 20:11:24,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:24,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:24,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:24,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110903096] [2024-06-03 20:11:24,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110903096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:24,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:24,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:24,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934997179] [2024-06-03 20:11:24,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:24,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:24,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:24,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:24,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:25,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:25,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 722 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) [2024-06-03 20:11:25,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:25,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:25,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:25,543 INFO L124 PetriNetUnfolderBase]: 1533/2324 cut-off events. [2024-06-03 20:11:25,543 INFO L125 PetriNetUnfolderBase]: For 25347/25347 co-relation queries the response was YES. [2024-06-03 20:11:25,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11535 conditions, 2324 events. 1533/2324 cut-off events. For 25347/25347 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10619 event pairs, 482 based on Foata normal form. 4/2327 useless extension candidates. Maximal degree in co-relation 11493. Up to 2230 conditions per place. [2024-06-03 20:11:25,557 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 86 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-03 20:11:25,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 109 transitions, 1020 flow [2024-06-03 20:11:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:25,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-03 20:11:25,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-03 20:11:25,558 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 722 flow. Second operand 7 states and 111 transitions. [2024-06-03 20:11:25,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 109 transitions, 1020 flow [2024-06-03 20:11:25,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 109 transitions, 964 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:25,585 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 752 flow [2024-06-03 20:11:25,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=752, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2024-06-03 20:11:25,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-03 20:11:25,586 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 752 flow [2024-06-03 20:11:25,586 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) [2024-06-03 20:11:25,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:25,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:25,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:11:25,587 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:25,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:25,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2024796048, now seen corresponding path program 1 times [2024-06-03 20:11:25,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:25,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270087145] [2024-06-03 20:11:25,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:25,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:26,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270087145] [2024-06-03 20:11:26,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270087145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:26,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:26,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:11:26,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829710237] [2024-06-03 20:11:26,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:26,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:11:26,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:26,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:11:26,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:11:26,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:26,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 752 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) [2024-06-03 20:11:26,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:26,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:26,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:26,678 INFO L124 PetriNetUnfolderBase]: 1527/2316 cut-off events. [2024-06-03 20:11:26,678 INFO L125 PetriNetUnfolderBase]: For 27829/27829 co-relation queries the response was YES. [2024-06-03 20:11:26,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11717 conditions, 2316 events. 1527/2316 cut-off events. For 27829/27829 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10529 event pairs, 481 based on Foata normal form. 2/2317 useless extension candidates. Maximal degree in co-relation 11674. Up to 2294 conditions per place. [2024-06-03 20:11:26,691 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 87 selfloop transitions, 10 changer transitions 0/100 dead transitions. [2024-06-03 20:11:26,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 100 transitions, 992 flow [2024-06-03 20:11:26,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:11:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:11:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-06-03 20:11:26,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-06-03 20:11:26,693 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 752 flow. Second operand 5 states and 79 transitions. [2024-06-03 20:11:26,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 100 transitions, 992 flow [2024-06-03 20:11:26,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 100 transitions, 926 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:26,716 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 742 flow [2024-06-03 20:11:26,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=742, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2024-06-03 20:11:26,716 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-03 20:11:26,717 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 742 flow [2024-06-03 20:11:26,717 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) [2024-06-03 20:11:26,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:26,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:26,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:11:26,717 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)] === [2024-06-03 20:11:26,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:26,718 INFO L85 PathProgramCache]: Analyzing trace with hash 730455390, now seen corresponding path program 1 times [2024-06-03 20:11:26,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:26,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176317153] [2024-06-03 20:11:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:26,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:27,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:27,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176317153] [2024-06-03 20:11:27,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176317153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:27,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:27,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:27,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513586038] [2024-06-03 20:11:27,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:27,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:27,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:27,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:27,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:27,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:27,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 742 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) [2024-06-03 20:11:27,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:27,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:27,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:28,207 INFO L124 PetriNetUnfolderBase]: 1696/2596 cut-off events. [2024-06-03 20:11:28,207 INFO L125 PetriNetUnfolderBase]: For 32330/32332 co-relation queries the response was YES. [2024-06-03 20:11:28,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13132 conditions, 2596 events. 1696/2596 cut-off events. For 32330/32332 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12353 event pairs, 297 based on Foata normal form. 18/2613 useless extension candidates. Maximal degree in co-relation 13088. Up to 1837 conditions per place. [2024-06-03 20:11:28,219 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 105 selfloop transitions, 28 changer transitions 0/136 dead transitions. [2024-06-03 20:11:28,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 136 transitions, 1238 flow [2024-06-03 20:11:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:11:28,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-03 20:11:28,221 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 742 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:11:28,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 136 transitions, 1238 flow [2024-06-03 20:11:28,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 136 transitions, 1204 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 20:11:28,241 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 808 flow [2024-06-03 20:11:28,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=808, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2024-06-03 20:11:28,242 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-03 20:11:28,242 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 808 flow [2024-06-03 20:11:28,242 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) [2024-06-03 20:11:28,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:28,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:28,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:11:28,243 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)] === [2024-06-03 20:11:28,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:28,243 INFO L85 PathProgramCache]: Analyzing trace with hash 730515840, now seen corresponding path program 2 times [2024-06-03 20:11:28,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:28,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838719075] [2024-06-03 20:11:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:28,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:29,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:29,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838719075] [2024-06-03 20:11:29,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838719075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:29,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:29,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:29,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936984741] [2024-06-03 20:11:29,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:29,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:29,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:29,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:29,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:29,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:29,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 808 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) [2024-06-03 20:11:29,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:29,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:29,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:29,648 INFO L124 PetriNetUnfolderBase]: 1721/2643 cut-off events. [2024-06-03 20:11:29,648 INFO L125 PetriNetUnfolderBase]: For 35887/35889 co-relation queries the response was YES. [2024-06-03 20:11:29,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13596 conditions, 2643 events. 1721/2643 cut-off events. For 35887/35889 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12702 event pairs, 461 based on Foata normal form. 22/2664 useless extension candidates. Maximal degree in co-relation 13551. Up to 2271 conditions per place. [2024-06-03 20:11:29,665 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 104 selfloop transitions, 29 changer transitions 0/136 dead transitions. [2024-06-03 20:11:29,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 136 transitions, 1216 flow [2024-06-03 20:11:29,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 20:11:29,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-03 20:11:29,668 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 808 flow. Second operand 9 states and 157 transitions. [2024-06-03 20:11:29,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 136 transitions, 1216 flow [2024-06-03 20:11:29,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 136 transitions, 1179 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:29,720 INFO L231 Difference]: Finished difference. Result has 99 places, 94 transitions, 861 flow [2024-06-03 20:11:29,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=861, PETRI_PLACES=99, PETRI_TRANSITIONS=94} [2024-06-03 20:11:29,720 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-03 20:11:29,721 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 94 transitions, 861 flow [2024-06-03 20:11:29,721 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) [2024-06-03 20:11:29,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:29,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:29,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:11:29,721 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)] === [2024-06-03 20:11:29,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:29,722 INFO L85 PathProgramCache]: Analyzing trace with hash 848787970, now seen corresponding path program 1 times [2024-06-03 20:11:29,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:29,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007713010] [2024-06-03 20:11:29,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:29,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:30,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007713010] [2024-06-03 20:11:30,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007713010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:30,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:30,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:30,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503797208] [2024-06-03 20:11:30,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:30,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:30,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:30,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:30,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:30,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 94 transitions, 861 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) [2024-06-03 20:11:30,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:30,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:30,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:31,282 INFO L124 PetriNetUnfolderBase]: 1713/2631 cut-off events. [2024-06-03 20:11:31,283 INFO L125 PetriNetUnfolderBase]: For 36575/36577 co-relation queries the response was YES. [2024-06-03 20:11:31,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13796 conditions, 2631 events. 1713/2631 cut-off events. For 36575/36577 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12648 event pairs, 482 based on Foata normal form. 6/2636 useless extension candidates. Maximal degree in co-relation 13749. Up to 2386 conditions per place. [2024-06-03 20:11:31,295 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 95 selfloop transitions, 25 changer transitions 0/123 dead transitions. [2024-06-03 20:11:31,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 123 transitions, 1213 flow [2024-06-03 20:11:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 20:11:31,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-03 20:11:31,297 INFO L175 Difference]: Start difference. First operand has 99 places, 94 transitions, 861 flow. Second operand 7 states and 117 transitions. [2024-06-03 20:11:31,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 123 transitions, 1213 flow [2024-06-03 20:11:31,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 123 transitions, 1153 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:11:31,346 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 923 flow [2024-06-03 20:11:31,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=923, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2024-06-03 20:11:31,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-03 20:11:31,350 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 923 flow [2024-06-03 20:11:31,350 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) [2024-06-03 20:11:31,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:31,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:31,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:11:31,351 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)] === [2024-06-03 20:11:31,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:31,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2130723488, now seen corresponding path program 2 times [2024-06-03 20:11:31,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:31,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948549305] [2024-06-03 20:11:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:31,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:32,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:32,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948549305] [2024-06-03 20:11:32,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948549305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:32,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:32,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:32,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504754590] [2024-06-03 20:11:32,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:32,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:32,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:32,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:32,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:32,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:32,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 923 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) [2024-06-03 20:11:32,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:32,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:32,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:32,560 INFO L124 PetriNetUnfolderBase]: 1730/2658 cut-off events. [2024-06-03 20:11:32,564 INFO L125 PetriNetUnfolderBase]: For 40037/40039 co-relation queries the response was YES. [2024-06-03 20:11:32,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14215 conditions, 2658 events. 1730/2658 cut-off events. For 40037/40039 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12769 event pairs, 500 based on Foata normal form. 4/2661 useless extension candidates. Maximal degree in co-relation 14166. Up to 2562 conditions per place. [2024-06-03 20:11:32,583 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 104 selfloop transitions, 15 changer transitions 0/122 dead transitions. [2024-06-03 20:11:32,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 122 transitions, 1245 flow [2024-06-03 20:11:32,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:32,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-03 20:11:32,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-03 20:11:32,586 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 923 flow. Second operand 7 states and 111 transitions. [2024-06-03 20:11:32,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 122 transitions, 1245 flow [2024-06-03 20:11:32,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 122 transitions, 1194 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 20:11:32,620 INFO L231 Difference]: Finished difference. Result has 104 places, 100 transitions, 943 flow [2024-06-03 20:11:32,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=943, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2024-06-03 20:11:32,621 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-03 20:11:32,621 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 943 flow [2024-06-03 20:11:32,621 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) [2024-06-03 20:11:32,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:32,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:32,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:11:32,622 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)] === [2024-06-03 20:11:32,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:32,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2052254516, now seen corresponding path program 3 times [2024-06-03 20:11:32,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:32,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9062784] [2024-06-03 20:11:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:32,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:33,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9062784] [2024-06-03 20:11:33,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9062784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:33,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:33,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:33,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448953991] [2024-06-03 20:11:33,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:33,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:33,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:33,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:33,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:33,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:33,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 943 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) [2024-06-03 20:11:33,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:33,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:33,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:34,127 INFO L124 PetriNetUnfolderBase]: 1747/2685 cut-off events. [2024-06-03 20:11:34,128 INFO L125 PetriNetUnfolderBase]: For 44131/44133 co-relation queries the response was YES. [2024-06-03 20:11:34,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14640 conditions, 2685 events. 1747/2685 cut-off events. For 44131/44133 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12943 event pairs, 482 based on Foata normal form. 4/2688 useless extension candidates. Maximal degree in co-relation 14589. Up to 2348 conditions per place. [2024-06-03 20:11:34,147 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 90 selfloop transitions, 38 changer transitions 0/131 dead transitions. [2024-06-03 20:11:34,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 131 transitions, 1413 flow [2024-06-03 20:11:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:11:34,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:11:34,148 INFO L175 Difference]: Start difference. First operand has 104 places, 100 transitions, 943 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:11:34,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 131 transitions, 1413 flow [2024-06-03 20:11:34,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 131 transitions, 1360 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:34,210 INFO L231 Difference]: Finished difference. Result has 106 places, 104 transitions, 1049 flow [2024-06-03 20:11:34,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1049, PETRI_PLACES=106, PETRI_TRANSITIONS=104} [2024-06-03 20:11:34,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-03 20:11:34,211 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 104 transitions, 1049 flow [2024-06-03 20:11:34,211 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) [2024-06-03 20:11:34,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:34,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:34,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:11:34,211 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)] === [2024-06-03 20:11:34,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:34,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2122442768, now seen corresponding path program 4 times [2024-06-03 20:11:34,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:34,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426349998] [2024-06-03 20:11:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:34,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:35,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:35,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426349998] [2024-06-03 20:11:35,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426349998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:35,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:35,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:35,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016453386] [2024-06-03 20:11:35,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:35,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:35,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:35,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:35,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:35,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:35,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 104 transitions, 1049 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) [2024-06-03 20:11:35,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:35,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:35,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:35,575 INFO L124 PetriNetUnfolderBase]: 1739/2673 cut-off events. [2024-06-03 20:11:35,575 INFO L125 PetriNetUnfolderBase]: For 47401/47403 co-relation queries the response was YES. [2024-06-03 20:11:35,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14891 conditions, 2673 events. 1739/2673 cut-off events. For 47401/47403 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12844 event pairs, 494 based on Foata normal form. 4/2676 useless extension candidates. Maximal degree in co-relation 14839. Up to 2470 conditions per place. [2024-06-03 20:11:35,594 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 97 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-03 20:11:35,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 132 transitions, 1381 flow [2024-06-03 20:11:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 20:11:35,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-03 20:11:35,596 INFO L175 Difference]: Start difference. First operand has 106 places, 104 transitions, 1049 flow. Second operand 7 states and 122 transitions. [2024-06-03 20:11:35,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 132 transitions, 1381 flow [2024-06-03 20:11:35,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 132 transitions, 1295 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:35,646 INFO L231 Difference]: Finished difference. Result has 109 places, 104 transitions, 1037 flow [2024-06-03 20:11:35,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1037, PETRI_PLACES=109, PETRI_TRANSITIONS=104} [2024-06-03 20:11:35,646 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-03 20:11:35,646 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 104 transitions, 1037 flow [2024-06-03 20:11:35,646 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) [2024-06-03 20:11:35,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:35,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:35,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:11:35,647 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:35,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:35,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1454079852, now seen corresponding path program 1 times [2024-06-03 20:11:35,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:35,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281908433] [2024-06-03 20:11:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:35,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:36,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:36,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281908433] [2024-06-03 20:11:36,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281908433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:36,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:36,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:11:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288610211] [2024-06-03 20:11:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:36,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:11:36,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:36,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:11:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:11:36,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:36,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 104 transitions, 1037 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) [2024-06-03 20:11:36,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:36,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:36,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:36,860 INFO L124 PetriNetUnfolderBase]: 1749/2708 cut-off events. [2024-06-03 20:11:36,860 INFO L125 PetriNetUnfolderBase]: For 50857/50857 co-relation queries the response was YES. [2024-06-03 20:11:36,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15017 conditions, 2708 events. 1749/2708 cut-off events. For 50857/50857 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13249 event pairs, 893 based on Foata normal form. 2/2709 useless extension candidates. Maximal degree in co-relation 14964. Up to 2635 conditions per place. [2024-06-03 20:11:36,879 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 103 selfloop transitions, 20 changer transitions 0/126 dead transitions. [2024-06-03 20:11:36,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 1436 flow [2024-06-03 20:11:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-03 20:11:36,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-03 20:11:36,880 INFO L175 Difference]: Start difference. First operand has 109 places, 104 transitions, 1037 flow. Second operand 7 states and 104 transitions. [2024-06-03 20:11:36,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 1436 flow [2024-06-03 20:11:36,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 126 transitions, 1352 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:11:36,927 INFO L231 Difference]: Finished difference. Result has 111 places, 112 transitions, 1082 flow [2024-06-03 20:11:36,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1082, PETRI_PLACES=111, PETRI_TRANSITIONS=112} [2024-06-03 20:11:36,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-03 20:11:36,928 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 112 transitions, 1082 flow [2024-06-03 20:11:36,928 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) [2024-06-03 20:11:36,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:36,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:36,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:11:36,929 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:36,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1437074078, now seen corresponding path program 2 times [2024-06-03 20:11:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:36,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106974221] [2024-06-03 20:11:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:36,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:37,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:37,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106974221] [2024-06-03 20:11:37,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106974221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:37,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:37,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:11:37,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221288500] [2024-06-03 20:11:37,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:37,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:11:37,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:37,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:11:37,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:11:37,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:37,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 112 transitions, 1082 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) [2024-06-03 20:11:37,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:37,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:37,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:38,133 INFO L124 PetriNetUnfolderBase]: 1743/2700 cut-off events. [2024-06-03 20:11:38,133 INFO L125 PetriNetUnfolderBase]: For 53976/53976 co-relation queries the response was YES. [2024-06-03 20:11:38,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15215 conditions, 2700 events. 1743/2700 cut-off events. For 53976/53976 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13230 event pairs, 892 based on Foata normal form. 2/2701 useless extension candidates. Maximal degree in co-relation 15160. Up to 2638 conditions per place. [2024-06-03 20:11:38,150 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 104 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2024-06-03 20:11:38,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 123 transitions, 1352 flow [2024-06-03 20:11:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:11:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:11:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-03 20:11:38,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-03 20:11:38,152 INFO L175 Difference]: Start difference. First operand has 111 places, 112 transitions, 1082 flow. Second operand 5 states and 83 transitions. [2024-06-03 20:11:38,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 123 transitions, 1352 flow [2024-06-03 20:11:38,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 123 transitions, 1311 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-03 20:11:38,204 INFO L231 Difference]: Finished difference. Result has 114 places, 112 transitions, 1085 flow [2024-06-03 20:11:38,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1085, PETRI_PLACES=114, PETRI_TRANSITIONS=112} [2024-06-03 20:11:38,205 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-03 20:11:38,205 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 112 transitions, 1085 flow [2024-06-03 20:11:38,205 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) [2024-06-03 20:11:38,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:38,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:38,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:11:38,206 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)] === [2024-06-03 20:11:38,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:38,206 INFO L85 PathProgramCache]: Analyzing trace with hash 936730022, now seen corresponding path program 1 times [2024-06-03 20:11:38,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:38,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875329617] [2024-06-03 20:11:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:38,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:38,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:38,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875329617] [2024-06-03 20:11:38,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875329617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:38,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:38,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:38,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523738889] [2024-06-03 20:11:38,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:38,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:38,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:38,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:38,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:38,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:38,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 112 transitions, 1085 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) [2024-06-03 20:11:38,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:38,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:38,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:39,356 INFO L124 PetriNetUnfolderBase]: 1792/2756 cut-off events. [2024-06-03 20:11:39,356 INFO L125 PetriNetUnfolderBase]: For 58141/58149 co-relation queries the response was YES. [2024-06-03 20:11:39,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15785 conditions, 2756 events. 1792/2756 cut-off events. For 58141/58149 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13445 event pairs, 508 based on Foata normal form. 11/2766 useless extension candidates. Maximal degree in co-relation 15728. Up to 2579 conditions per place. [2024-06-03 20:11:39,372 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 128 selfloop transitions, 39 changer transitions 0/170 dead transitions. [2024-06-03 20:11:39,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 170 transitions, 1900 flow [2024-06-03 20:11:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:11:39,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-03 20:11:39,374 INFO L175 Difference]: Start difference. First operand has 114 places, 112 transitions, 1085 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:11:39,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 170 transitions, 1900 flow [2024-06-03 20:11:39,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 170 transitions, 1864 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:39,429 INFO L231 Difference]: Finished difference. Result has 122 places, 139 transitions, 1491 flow [2024-06-03 20:11:39,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1491, PETRI_PLACES=122, PETRI_TRANSITIONS=139} [2024-06-03 20:11:39,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-03 20:11:39,430 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 139 transitions, 1491 flow [2024-06-03 20:11:39,430 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) [2024-06-03 20:11:39,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:39,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:39,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:11:39,430 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:39,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:39,431 INFO L85 PathProgramCache]: Analyzing trace with hash 301568966, now seen corresponding path program 2 times [2024-06-03 20:11:39,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:39,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610129252] [2024-06-03 20:11:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:39,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:40,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:40,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610129252] [2024-06-03 20:11:40,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610129252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:40,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:40,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:40,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129802227] [2024-06-03 20:11:40,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:40,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:40,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:40,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:40,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:40,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:40,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 139 transitions, 1491 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) [2024-06-03 20:11:40,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:40,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:40,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:40,851 INFO L124 PetriNetUnfolderBase]: 2008/3079 cut-off events. [2024-06-03 20:11:40,851 INFO L125 PetriNetUnfolderBase]: For 70022/70026 co-relation queries the response was YES. [2024-06-03 20:11:40,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19643 conditions, 3079 events. 2008/3079 cut-off events. For 70022/70026 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15260 event pairs, 701 based on Foata normal form. 7/3085 useless extension candidates. Maximal degree in co-relation 19581. Up to 2710 conditions per place. [2024-06-03 20:11:40,888 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 147 selfloop transitions, 74 changer transitions 0/224 dead transitions. [2024-06-03 20:11:40,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 224 transitions, 2941 flow [2024-06-03 20:11:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:40,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:40,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:11:40,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-03 20:11:40,907 INFO L175 Difference]: Start difference. First operand has 122 places, 139 transitions, 1491 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:11:40,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 224 transitions, 2941 flow [2024-06-03 20:11:41,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 224 transitions, 2849 flow, removed 45 selfloop flow, removed 1 redundant places. [2024-06-03 20:11:41,021 INFO L231 Difference]: Finished difference. Result has 132 places, 187 transitions, 2341 flow [2024-06-03 20:11:41,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2341, PETRI_PLACES=132, PETRI_TRANSITIONS=187} [2024-06-03 20:11:41,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-03 20:11:41,021 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 187 transitions, 2341 flow [2024-06-03 20:11:41,022 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) [2024-06-03 20:11:41,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:41,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:41,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:11:41,022 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)] === [2024-06-03 20:11:41,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:41,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1304346495, now seen corresponding path program 1 times [2024-06-03 20:11:41,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:41,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789412842] [2024-06-03 20:11:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:41,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:42,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:42,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789412842] [2024-06-03 20:11:42,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789412842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:42,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:42,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:42,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196897836] [2024-06-03 20:11:42,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:42,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:42,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:42,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:42,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:42,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:42,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 187 transitions, 2341 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) [2024-06-03 20:11:42,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:42,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:42,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:43,084 INFO L124 PetriNetUnfolderBase]: 2156/3321 cut-off events. [2024-06-03 20:11:43,084 INFO L125 PetriNetUnfolderBase]: For 82169/82179 co-relation queries the response was YES. [2024-06-03 20:11:43,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22101 conditions, 3321 events. 2156/3321 cut-off events. For 82169/82179 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16841 event pairs, 695 based on Foata normal form. 22/3342 useless extension candidates. Maximal degree in co-relation 22033. Up to 2842 conditions per place. [2024-06-03 20:11:43,114 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 188 selfloop transitions, 57 changer transitions 0/248 dead transitions. [2024-06-03 20:11:43,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 248 transitions, 3301 flow [2024-06-03 20:11:43,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:43,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:11:43,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:11:43,116 INFO L175 Difference]: Start difference. First operand has 132 places, 187 transitions, 2341 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:11:43,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 248 transitions, 3301 flow [2024-06-03 20:11:43,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 248 transitions, 3231 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-03 20:11:43,262 INFO L231 Difference]: Finished difference. Result has 142 places, 207 transitions, 2731 flow [2024-06-03 20:11:43,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2731, PETRI_PLACES=142, PETRI_TRANSITIONS=207} [2024-06-03 20:11:43,266 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-03 20:11:43,267 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 207 transitions, 2731 flow [2024-06-03 20:11:43,267 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) [2024-06-03 20:11:43,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:43,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:43,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:11:43,267 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:43,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:43,268 INFO L85 PathProgramCache]: Analyzing trace with hash 301838077, now seen corresponding path program 1 times [2024-06-03 20:11:43,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:43,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78308732] [2024-06-03 20:11:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:43,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:43,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:43,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78308732] [2024-06-03 20:11:43,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78308732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:43,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:43,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:43,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391128481] [2024-06-03 20:11:43,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:43,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:43,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:43,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:43,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:43,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:43,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 207 transitions, 2731 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) [2024-06-03 20:11:43,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:43,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:43,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:44,627 INFO L124 PetriNetUnfolderBase]: 2166/3329 cut-off events. [2024-06-03 20:11:44,627 INFO L125 PetriNetUnfolderBase]: For 86013/86017 co-relation queries the response was YES. [2024-06-03 20:11:44,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22946 conditions, 3329 events. 2166/3329 cut-off events. For 86013/86017 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16840 event pairs, 758 based on Foata normal form. 6/3334 useless extension candidates. Maximal degree in co-relation 22873. Up to 3237 conditions per place. [2024-06-03 20:11:44,652 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 207 selfloop transitions, 28 changer transitions 0/238 dead transitions. [2024-06-03 20:11:44,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 238 transitions, 3424 flow [2024-06-03 20:11:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:44,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:11:44,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 20:11:44,654 INFO L175 Difference]: Start difference. First operand has 142 places, 207 transitions, 2731 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:11:44,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 238 transitions, 3424 flow [2024-06-03 20:11:44,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 238 transitions, 3356 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 20:11:44,758 INFO L231 Difference]: Finished difference. Result has 148 places, 216 transitions, 2847 flow [2024-06-03 20:11:44,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2663, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2847, PETRI_PLACES=148, PETRI_TRANSITIONS=216} [2024-06-03 20:11:44,759 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-03 20:11:44,759 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 216 transitions, 2847 flow [2024-06-03 20:11:44,759 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) [2024-06-03 20:11:44,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:44,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:44,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:11:44,760 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:44,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash 301837736, now seen corresponding path program 3 times [2024-06-03 20:11:44,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:44,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851456818] [2024-06-03 20:11:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:44,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:45,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:45,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851456818] [2024-06-03 20:11:45,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851456818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:45,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:45,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:45,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030343741] [2024-06-03 20:11:45,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:45,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:45,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:45,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:45,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:45,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:45,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 216 transitions, 2847 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) [2024-06-03 20:11:45,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:45,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:45,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:46,204 INFO L124 PetriNetUnfolderBase]: 2209/3389 cut-off events. [2024-06-03 20:11:46,205 INFO L125 PetriNetUnfolderBase]: For 92509/92513 co-relation queries the response was YES. [2024-06-03 20:11:46,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23633 conditions, 3389 events. 2209/3389 cut-off events. For 92509/92513 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17167 event pairs, 758 based on Foata normal form. 7/3395 useless extension candidates. Maximal degree in co-relation 23558. Up to 3290 conditions per place. [2024-06-03 20:11:46,230 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 213 selfloop transitions, 34 changer transitions 0/250 dead transitions. [2024-06-03 20:11:46,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 250 transitions, 3651 flow [2024-06-03 20:11:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:46,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-03 20:11:46,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-03 20:11:46,233 INFO L175 Difference]: Start difference. First operand has 148 places, 216 transitions, 2847 flow. Second operand 9 states and 138 transitions. [2024-06-03 20:11:46,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 250 transitions, 3651 flow [2024-06-03 20:11:46,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 250 transitions, 3592 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-03 20:11:46,370 INFO L231 Difference]: Finished difference. Result has 156 places, 228 transitions, 3076 flow [2024-06-03 20:11:46,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3076, PETRI_PLACES=156, PETRI_TRANSITIONS=228} [2024-06-03 20:11:46,371 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-03 20:11:46,371 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 228 transitions, 3076 flow [2024-06-03 20:11:46,371 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) [2024-06-03 20:11:46,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:46,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:46,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:11:46,371 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)] === [2024-06-03 20:11:46,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:46,372 INFO L85 PathProgramCache]: Analyzing trace with hash 327314180, now seen corresponding path program 4 times [2024-06-03 20:11:46,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:46,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478892095] [2024-06-03 20:11:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:46,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:46,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:46,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478892095] [2024-06-03 20:11:46,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478892095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:46,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:46,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:11:46,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260108341] [2024-06-03 20:11:46,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:46,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:11:46,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:46,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:11:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:11:46,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:46,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 228 transitions, 3076 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:11:46,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:46,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:46,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:47,549 INFO L124 PetriNetUnfolderBase]: 2248/3446 cut-off events. [2024-06-03 20:11:47,550 INFO L125 PetriNetUnfolderBase]: For 99226/99232 co-relation queries the response was YES. [2024-06-03 20:11:47,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24401 conditions, 3446 events. 2248/3446 cut-off events. For 99226/99232 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17524 event pairs, 723 based on Foata normal form. 9/3454 useless extension candidates. Maximal degree in co-relation 24323. Up to 2950 conditions per place. [2024-06-03 20:11:47,576 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 147 selfloop transitions, 117 changer transitions 0/267 dead transitions. [2024-06-03 20:11:47,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 267 transitions, 4024 flow [2024-06-03 20:11:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:11:47,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-03 20:11:47,589 INFO L175 Difference]: Start difference. First operand has 156 places, 228 transitions, 3076 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:11:47,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 267 transitions, 4024 flow [2024-06-03 20:11:47,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 267 transitions, 3907 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 20:11:47,748 INFO L231 Difference]: Finished difference. Result has 158 places, 241 transitions, 3478 flow [2024-06-03 20:11:47,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3478, PETRI_PLACES=158, PETRI_TRANSITIONS=241} [2024-06-03 20:11:47,749 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-03 20:11:47,749 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 241 transitions, 3478 flow [2024-06-03 20:11:47,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:11:47,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:47,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:47,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:11:47,750 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)] === [2024-06-03 20:11:47,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:47,750 INFO L85 PathProgramCache]: Analyzing trace with hash 542624253, now seen corresponding path program 2 times [2024-06-03 20:11:47,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:47,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459859396] [2024-06-03 20:11:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:47,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:48,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:48,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459859396] [2024-06-03 20:11:48,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459859396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:48,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:48,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:48,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967185611] [2024-06-03 20:11:48,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:48,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:48,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:48,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:48,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:48,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:48,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 241 transitions, 3478 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) [2024-06-03 20:11:48,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:48,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:48,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:49,558 INFO L124 PetriNetUnfolderBase]: 2269/3495 cut-off events. [2024-06-03 20:11:49,558 INFO L125 PetriNetUnfolderBase]: For 112610/112620 co-relation queries the response was YES. [2024-06-03 20:11:49,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25350 conditions, 3495 events. 2269/3495 cut-off events. For 112610/112620 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17926 event pairs, 666 based on Foata normal form. 32/3526 useless extension candidates. Maximal degree in co-relation 25270. Up to 2680 conditions per place. [2024-06-03 20:11:49,588 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 197 selfloop transitions, 76 changer transitions 0/276 dead transitions. [2024-06-03 20:11:49,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 276 transitions, 4194 flow [2024-06-03 20:11:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:11:49,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-03 20:11:49,590 INFO L175 Difference]: Start difference. First operand has 158 places, 241 transitions, 3478 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:11:49,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 276 transitions, 4194 flow [2024-06-03 20:11:49,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 276 transitions, 4114 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-03 20:11:49,787 INFO L231 Difference]: Finished difference. Result has 164 places, 242 transitions, 3586 flow [2024-06-03 20:11:49,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3586, PETRI_PLACES=164, PETRI_TRANSITIONS=242} [2024-06-03 20:11:49,788 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-03 20:11:49,788 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 242 transitions, 3586 flow [2024-06-03 20:11:49,788 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) [2024-06-03 20:11:49,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:49,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:49,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:11:49,789 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:49,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:49,789 INFO L85 PathProgramCache]: Analyzing trace with hash -533914788, now seen corresponding path program 5 times [2024-06-03 20:11:49,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:49,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152619110] [2024-06-03 20:11:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:49,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:50,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:50,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152619110] [2024-06-03 20:11:50,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152619110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:50,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:50,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:11:50,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142275268] [2024-06-03 20:11:50,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:50,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:11:50,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:11:50,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:11:50,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:50,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 242 transitions, 3586 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:11:50,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:50,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:50,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:51,205 INFO L124 PetriNetUnfolderBase]: 2325/3560 cut-off events. [2024-06-03 20:11:51,205 INFO L125 PetriNetUnfolderBase]: For 107778/107782 co-relation queries the response was YES. [2024-06-03 20:11:51,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26247 conditions, 3560 events. 2325/3560 cut-off events. For 107778/107782 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18204 event pairs, 766 based on Foata normal form. 7/3566 useless extension candidates. Maximal degree in co-relation 26165. Up to 3428 conditions per place. [2024-06-03 20:11:51,242 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 226 selfloop transitions, 49 changer transitions 0/278 dead transitions. [2024-06-03 20:11:51,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 278 transitions, 4538 flow [2024-06-03 20:11:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:51,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 20:11:51,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-03 20:11:51,243 INFO L175 Difference]: Start difference. First operand has 164 places, 242 transitions, 3586 flow. Second operand 8 states and 123 transitions. [2024-06-03 20:11:51,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 278 transitions, 4538 flow [2024-06-03 20:11:51,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 278 transitions, 4354 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:11:51,456 INFO L231 Difference]: Finished difference. Result has 167 places, 258 transitions, 3826 flow [2024-06-03 20:11:51,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3826, PETRI_PLACES=167, PETRI_TRANSITIONS=258} [2024-06-03 20:11:51,456 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-03 20:11:51,456 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 258 transitions, 3826 flow [2024-06-03 20:11:51,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:11:51,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:51,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:51,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:11:51,457 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:51,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:51,457 INFO L85 PathProgramCache]: Analyzing trace with hash -533914447, now seen corresponding path program 2 times [2024-06-03 20:11:51,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:51,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221710747] [2024-06-03 20:11:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:51,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:52,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:52,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221710747] [2024-06-03 20:11:52,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221710747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:52,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:52,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:11:52,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106737057] [2024-06-03 20:11:52,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:52,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:11:52,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:52,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:11:52,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:11:52,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:52,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 258 transitions, 3826 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:11:52,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:52,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:52,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:52,761 INFO L124 PetriNetUnfolderBase]: 2335/3574 cut-off events. [2024-06-03 20:11:52,762 INFO L125 PetriNetUnfolderBase]: For 105019/105023 co-relation queries the response was YES. [2024-06-03 20:11:52,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26049 conditions, 3574 events. 2335/3574 cut-off events. For 105019/105023 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18294 event pairs, 768 based on Foata normal form. 6/3579 useless extension candidates. Maximal degree in co-relation 25965. Up to 3475 conditions per place. [2024-06-03 20:11:52,788 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 243 selfloop transitions, 33 changer transitions 0/279 dead transitions. [2024-06-03 20:11:52,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 279 transitions, 4539 flow [2024-06-03 20:11:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 20:11:52,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-03 20:11:52,790 INFO L175 Difference]: Start difference. First operand has 167 places, 258 transitions, 3826 flow. Second operand 7 states and 113 transitions. [2024-06-03 20:11:52,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 279 transitions, 4539 flow [2024-06-03 20:11:52,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 279 transitions, 4411 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:52,979 INFO L231 Difference]: Finished difference. Result has 170 places, 261 transitions, 3821 flow [2024-06-03 20:11:52,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3700, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3821, PETRI_PLACES=170, PETRI_TRANSITIONS=261} [2024-06-03 20:11:52,980 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-03 20:11:52,980 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 261 transitions, 3821 flow [2024-06-03 20:11:52,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:11:52,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:52,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:52,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:11:52,981 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:52,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:52,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1809291035, now seen corresponding path program 3 times [2024-06-03 20:11:52,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:52,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352785510] [2024-06-03 20:11:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:52,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:53,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:53,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352785510] [2024-06-03 20:11:53,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352785510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:53,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:53,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:53,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883940209] [2024-06-03 20:11:53,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:53,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:53,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:53,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:53,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:53,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:53,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 261 transitions, 3821 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) [2024-06-03 20:11:53,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:53,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:53,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:54,625 INFO L124 PetriNetUnfolderBase]: 2376/3654 cut-off events. [2024-06-03 20:11:54,625 INFO L125 PetriNetUnfolderBase]: For 109806/109808 co-relation queries the response was YES. [2024-06-03 20:11:54,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26238 conditions, 3654 events. 2376/3654 cut-off events. For 109806/109808 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18858 event pairs, 897 based on Foata normal form. 12/3665 useless extension candidates. Maximal degree in co-relation 26154. Up to 3458 conditions per place. [2024-06-03 20:11:54,656 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 270 selfloop transitions, 17 changer transitions 0/290 dead transitions. [2024-06-03 20:11:54,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 290 transitions, 4523 flow [2024-06-03 20:11:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 20:11:54,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-03 20:11:54,657 INFO L175 Difference]: Start difference. First operand has 170 places, 261 transitions, 3821 flow. Second operand 8 states and 126 transitions. [2024-06-03 20:11:54,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 290 transitions, 4523 flow [2024-06-03 20:11:54,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 290 transitions, 4430 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 20:11:54,850 INFO L231 Difference]: Finished difference. Result has 172 places, 262 transitions, 3796 flow [2024-06-03 20:11:54,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3728, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3796, PETRI_PLACES=172, PETRI_TRANSITIONS=262} [2024-06-03 20:11:54,851 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-03 20:11:54,851 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 262 transitions, 3796 flow [2024-06-03 20:11:54,851 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) [2024-06-03 20:11:54,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:54,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:54,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:11:54,851 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)] === [2024-06-03 20:11:54,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:54,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1371211592, now seen corresponding path program 1 times [2024-06-03 20:11:54,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:54,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467499560] [2024-06-03 20:11:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:54,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:55,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:55,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467499560] [2024-06-03 20:11:55,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467499560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:55,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:55,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:55,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284809593] [2024-06-03 20:11:55,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:55,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:55,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:55,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:55,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:56,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:56,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 262 transitions, 3796 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) [2024-06-03 20:11:56,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:56,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:56,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:56,789 INFO L124 PetriNetUnfolderBase]: 2348/3597 cut-off events. [2024-06-03 20:11:56,789 INFO L125 PetriNetUnfolderBase]: For 99144/99154 co-relation queries the response was YES. [2024-06-03 20:11:56,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25353 conditions, 3597 events. 2348/3597 cut-off events. For 99144/99154 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18393 event pairs, 533 based on Foata normal form. 24/3620 useless extension candidates. Maximal degree in co-relation 25270. Up to 2859 conditions per place. [2024-06-03 20:11:56,821 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 222 selfloop transitions, 77 changer transitions 0/302 dead transitions. [2024-06-03 20:11:56,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 302 transitions, 4555 flow [2024-06-03 20:11:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:11:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:11:56,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:11:56,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-03 20:11:56,823 INFO L175 Difference]: Start difference. First operand has 172 places, 262 transitions, 3796 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:11:56,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 302 transitions, 4555 flow [2024-06-03 20:11:56,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 302 transitions, 4493 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:11:56,977 INFO L231 Difference]: Finished difference. Result has 172 places, 261 transitions, 3862 flow [2024-06-03 20:11:56,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3690, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3862, PETRI_PLACES=172, PETRI_TRANSITIONS=261} [2024-06-03 20:11:56,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-03 20:11:56,978 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 261 transitions, 3862 flow [2024-06-03 20:11:56,978 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) [2024-06-03 20:11:56,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:56,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:56,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:11:56,979 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:56,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:56,979 INFO L85 PathProgramCache]: Analyzing trace with hash -208787377, now seen corresponding path program 3 times [2024-06-03 20:11:56,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:56,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97273386] [2024-06-03 20:11:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:56,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:57,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:57,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97273386] [2024-06-03 20:11:57,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97273386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:57,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:57,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:11:57,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937719271] [2024-06-03 20:11:57,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:57,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:11:57,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:11:57,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:11:57,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:57,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 261 transitions, 3862 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:11:57,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:57,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:57,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:58,273 INFO L124 PetriNetUnfolderBase]: 2358/3623 cut-off events. [2024-06-03 20:11:58,273 INFO L125 PetriNetUnfolderBase]: For 97962/97962 co-relation queries the response was YES. [2024-06-03 20:11:58,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25741 conditions, 3623 events. 2358/3623 cut-off events. For 97962/97962 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18692 event pairs, 915 based on Foata normal form. 2/3624 useless extension candidates. Maximal degree in co-relation 25658. Up to 3564 conditions per place. [2024-06-03 20:11:58,303 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 256 selfloop transitions, 17 changer transitions 0/276 dead transitions. [2024-06-03 20:11:58,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 276 transitions, 4498 flow [2024-06-03 20:11:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:11:58,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:11:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-03 20:11:58,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 20:11:58,305 INFO L175 Difference]: Start difference. First operand has 172 places, 261 transitions, 3862 flow. Second operand 6 states and 90 transitions. [2024-06-03 20:11:58,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 276 transitions, 4498 flow [2024-06-03 20:11:58,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 276 transitions, 4332 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:11:58,480 INFO L231 Difference]: Finished difference. Result has 172 places, 267 transitions, 3810 flow [2024-06-03 20:11:58,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3810, PETRI_PLACES=172, PETRI_TRANSITIONS=267} [2024-06-03 20:11:58,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-03 20:11:58,481 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 267 transitions, 3810 flow [2024-06-03 20:11:58,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:11:58,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:58,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:58,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:11:58,482 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:58,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:58,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1599806641, now seen corresponding path program 4 times [2024-06-03 20:11:58,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:58,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459341684] [2024-06-03 20:11:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:58,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:59,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:59,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459341684] [2024-06-03 20:11:59,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459341684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:59,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:59,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:11:59,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139725258] [2024-06-03 20:11:59,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:59,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:11:59,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:59,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:11:59,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:11:59,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:11:59,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 267 transitions, 3810 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:11:59,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:59,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:11:59,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:59,876 INFO L124 PetriNetUnfolderBase]: 2360/3618 cut-off events. [2024-06-03 20:11:59,876 INFO L125 PetriNetUnfolderBase]: For 93943/93947 co-relation queries the response was YES. [2024-06-03 20:11:59,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25374 conditions, 3618 events. 2360/3618 cut-off events. For 93943/93947 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18618 event pairs, 762 based on Foata normal form. 6/3623 useless extension candidates. Maximal degree in co-relation 25290. Up to 3516 conditions per place. [2024-06-03 20:11:59,908 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 243 selfloop transitions, 40 changer transitions 0/286 dead transitions. [2024-06-03 20:11:59,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 286 transitions, 4544 flow [2024-06-03 20:11:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:11:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:11:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-03 20:11:59,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-03 20:11:59,914 INFO L175 Difference]: Start difference. First operand has 172 places, 267 transitions, 3810 flow. Second operand 6 states and 101 transitions. [2024-06-03 20:11:59,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 286 transitions, 4544 flow [2024-06-03 20:12:00,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 286 transitions, 4499 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-03 20:12:00,074 INFO L231 Difference]: Finished difference. Result has 176 places, 270 transitions, 3913 flow [2024-06-03 20:12:00,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3913, PETRI_PLACES=176, PETRI_TRANSITIONS=270} [2024-06-03 20:12:00,074 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-03 20:12:00,074 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 270 transitions, 3913 flow [2024-06-03 20:12:00,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:12:00,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:00,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:00,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:12:00,075 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:00,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:00,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1599806982, now seen corresponding path program 6 times [2024-06-03 20:12:00,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:00,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916680290] [2024-06-03 20:12:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:00,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:00,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:00,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916680290] [2024-06-03 20:12:00,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916680290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:00,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:00,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:12:00,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236104099] [2024-06-03 20:12:00,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:00,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:12:00,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:00,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:12:00,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:12:00,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:00,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 270 transitions, 3913 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:12:00,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:00,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:00,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:01,409 INFO L124 PetriNetUnfolderBase]: 2403/3680 cut-off events. [2024-06-03 20:12:01,409 INFO L125 PetriNetUnfolderBase]: For 100647/100651 co-relation queries the response was YES. [2024-06-03 20:12:01,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26204 conditions, 3680 events. 2403/3680 cut-off events. For 100647/100651 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19014 event pairs, 702 based on Foata normal form. 7/3686 useless extension candidates. Maximal degree in co-relation 26118. Up to 3342 conditions per place. [2024-06-03 20:12:01,444 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 232 selfloop transitions, 77 changer transitions 0/312 dead transitions. [2024-06-03 20:12:01,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 312 transitions, 4956 flow [2024-06-03 20:12:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:12:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:12:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:12:01,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-03 20:12:01,446 INFO L175 Difference]: Start difference. First operand has 176 places, 270 transitions, 3913 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:12:01,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 312 transitions, 4956 flow [2024-06-03 20:12:01,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 312 transitions, 4864 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:01,636 INFO L231 Difference]: Finished difference. Result has 181 places, 283 transitions, 4331 flow [2024-06-03 20:12:01,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4331, PETRI_PLACES=181, PETRI_TRANSITIONS=283} [2024-06-03 20:12:01,637 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-03 20:12:01,637 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 283 transitions, 4331 flow [2024-06-03 20:12:01,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:12:01,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:01,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:01,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:12:01,638 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)] === [2024-06-03 20:12:01,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:01,638 INFO L85 PathProgramCache]: Analyzing trace with hash -664485029, now seen corresponding path program 1 times [2024-06-03 20:12:01,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:01,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328940674] [2024-06-03 20:12:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:01,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:02,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:02,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328940674] [2024-06-03 20:12:02,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328940674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:02,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:02,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:02,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666325045] [2024-06-03 20:12:02,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:02,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:02,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:02,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:02,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:02,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:02,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 283 transitions, 4331 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) [2024-06-03 20:12:02,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:02,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:02,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:03,085 INFO L124 PetriNetUnfolderBase]: 2423/3713 cut-off events. [2024-06-03 20:12:03,085 INFO L125 PetriNetUnfolderBase]: For 105454/105454 co-relation queries the response was YES. [2024-06-03 20:12:03,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26927 conditions, 3713 events. 2423/3713 cut-off events. For 105454/105454 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19180 event pairs, 917 based on Foata normal form. 4/3716 useless extension candidates. Maximal degree in co-relation 26839. Up to 3585 conditions per place. [2024-06-03 20:12:03,117 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 272 selfloop transitions, 31 changer transitions 0/306 dead transitions. [2024-06-03 20:12:03,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 306 transitions, 5133 flow [2024-06-03 20:12:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:12:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:12:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-03 20:12:03,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 20:12:03,118 INFO L175 Difference]: Start difference. First operand has 181 places, 283 transitions, 4331 flow. Second operand 7 states and 112 transitions. [2024-06-03 20:12:03,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 306 transitions, 5133 flow [2024-06-03 20:12:03,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 306 transitions, 5017 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-03 20:12:03,301 INFO L231 Difference]: Finished difference. Result has 185 places, 289 transitions, 4354 flow [2024-06-03 20:12:03,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4215, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4354, PETRI_PLACES=185, PETRI_TRANSITIONS=289} [2024-06-03 20:12:03,302 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-03 20:12:03,302 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 289 transitions, 4354 flow [2024-06-03 20:12:03,302 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) [2024-06-03 20:12:03,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:03,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:03,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:12:03,303 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)] === [2024-06-03 20:12:03,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:03,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1599414739, now seen corresponding path program 2 times [2024-06-03 20:12:03,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:03,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540872294] [2024-06-03 20:12:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:03,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:03,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:03,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540872294] [2024-06-03 20:12:03,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540872294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:03,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:03,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:03,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902252576] [2024-06-03 20:12:03,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:03,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:03,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:03,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:03,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:03,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:03,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 289 transitions, 4354 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) [2024-06-03 20:12:03,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:03,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:03,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:04,752 INFO L124 PetriNetUnfolderBase]: 2443/3741 cut-off events. [2024-06-03 20:12:04,752 INFO L125 PetriNetUnfolderBase]: For 111585/111585 co-relation queries the response was YES. [2024-06-03 20:12:04,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27267 conditions, 3741 events. 2443/3741 cut-off events. For 111585/111585 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19350 event pairs, 913 based on Foata normal form. 4/3744 useless extension candidates. Maximal degree in co-relation 27178. Up to 3625 conditions per place. [2024-06-03 20:12:04,791 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 278 selfloop transitions, 29 changer transitions 0/310 dead transitions. [2024-06-03 20:12:04,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 310 transitions, 5142 flow [2024-06-03 20:12:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:12:04,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:12:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 20:12:04,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-03 20:12:04,792 INFO L175 Difference]: Start difference. First operand has 185 places, 289 transitions, 4354 flow. Second operand 8 states and 121 transitions. [2024-06-03 20:12:04,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 310 transitions, 5142 flow [2024-06-03 20:12:04,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 310 transitions, 5094 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-03 20:12:04,983 INFO L231 Difference]: Finished difference. Result has 190 places, 292 transitions, 4409 flow [2024-06-03 20:12:04,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4308, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4409, PETRI_PLACES=190, PETRI_TRANSITIONS=292} [2024-06-03 20:12:04,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-03 20:12:04,984 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 292 transitions, 4409 flow [2024-06-03 20:12:04,984 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) [2024-06-03 20:12:04,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:04,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:04,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:12:04,984 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:04,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:04,985 INFO L85 PathProgramCache]: Analyzing trace with hash 541300891, now seen corresponding path program 3 times [2024-06-03 20:12:04,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:04,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967922252] [2024-06-03 20:12:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:04,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:05,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:05,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967922252] [2024-06-03 20:12:05,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967922252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:05,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:05,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:05,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450333890] [2024-06-03 20:12:05,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:05,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:05,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:05,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:05,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:05,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:05,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 292 transitions, 4409 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) [2024-06-03 20:12:05,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:05,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:05,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:06,310 INFO L124 PetriNetUnfolderBase]: 2431/3725 cut-off events. [2024-06-03 20:12:06,311 INFO L125 PetriNetUnfolderBase]: For 114766/114766 co-relation queries the response was YES. [2024-06-03 20:12:06,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27249 conditions, 3725 events. 2431/3725 cut-off events. For 114766/114766 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19223 event pairs, 915 based on Foata normal form. 4/3728 useless extension candidates. Maximal degree in co-relation 27158. Up to 3617 conditions per place. [2024-06-03 20:12:06,347 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 276 selfloop transitions, 28 changer transitions 0/307 dead transitions. [2024-06-03 20:12:06,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 307 transitions, 5085 flow [2024-06-03 20:12:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:12:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:12:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-03 20:12:06,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-03 20:12:06,348 INFO L175 Difference]: Start difference. First operand has 190 places, 292 transitions, 4409 flow. Second operand 6 states and 99 transitions. [2024-06-03 20:12:06,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 307 transitions, 5085 flow [2024-06-03 20:12:06,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 307 transitions, 4975 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 20:12:06,571 INFO L231 Difference]: Finished difference. Result has 190 places, 292 transitions, 4362 flow [2024-06-03 20:12:06,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4299, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4362, PETRI_PLACES=190, PETRI_TRANSITIONS=292} [2024-06-03 20:12:06,572 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-03 20:12:06,572 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 292 transitions, 4362 flow [2024-06-03 20:12:06,572 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) [2024-06-03 20:12:06,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:06,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:06,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:12:06,573 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:06,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:06,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1599406803, now seen corresponding path program 1 times [2024-06-03 20:12:06,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:06,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193894316] [2024-06-03 20:12:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:06,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:07,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:07,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193894316] [2024-06-03 20:12:07,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193894316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:07,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:07,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:07,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984651147] [2024-06-03 20:12:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:07,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:07,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:07,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:07,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:07,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 292 transitions, 4362 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) [2024-06-03 20:12:07,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:07,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:07,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:08,155 INFO L124 PetriNetUnfolderBase]: 2426/3718 cut-off events. [2024-06-03 20:12:08,155 INFO L125 PetriNetUnfolderBase]: For 117406/117406 co-relation queries the response was YES. [2024-06-03 20:12:08,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27193 conditions, 3718 events. 2426/3718 cut-off events. For 117406/117406 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19097 event pairs, 910 based on Foata normal form. 2/3719 useless extension candidates. Maximal degree in co-relation 27101. Up to 3660 conditions per place. [2024-06-03 20:12:08,191 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 285 selfloop transitions, 15 changer transitions 0/303 dead transitions. [2024-06-03 20:12:08,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 303 transitions, 5022 flow [2024-06-03 20:12:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:12:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:12:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-06-03 20:12:08,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-03 20:12:08,192 INFO L175 Difference]: Start difference. First operand has 190 places, 292 transitions, 4362 flow. Second operand 6 states and 89 transitions. [2024-06-03 20:12:08,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 303 transitions, 5022 flow [2024-06-03 20:12:08,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 303 transitions, 4966 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:12:08,425 INFO L231 Difference]: Finished difference. Result has 191 places, 294 transitions, 4377 flow [2024-06-03 20:12:08,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4306, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4377, PETRI_PLACES=191, PETRI_TRANSITIONS=294} [2024-06-03 20:12:08,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-03 20:12:08,426 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 294 transitions, 4377 flow [2024-06-03 20:12:08,426 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) [2024-06-03 20:12:08,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:08,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:08,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:12:08,427 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)] === [2024-06-03 20:12:08,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:08,427 INFO L85 PathProgramCache]: Analyzing trace with hash -626536971, now seen corresponding path program 1 times [2024-06-03 20:12:08,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:08,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544029324] [2024-06-03 20:12:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:08,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:09,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:09,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544029324] [2024-06-03 20:12:09,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544029324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:09,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:09,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:09,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362406299] [2024-06-03 20:12:09,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:09,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:09,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:09,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:09,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:09,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-03 20:12:09,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 294 transitions, 4377 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) [2024-06-03 20:12:09,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:09,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-03 20:12:09,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:09,990 INFO L124 PetriNetUnfolderBase]: 2579/3954 cut-off events. [2024-06-03 20:12:09,990 INFO L125 PetriNetUnfolderBase]: For 146709/146745 co-relation queries the response was YES. [2024-06-03 20:12:10,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29526 conditions, 3954 events. 2579/3954 cut-off events. For 146709/146745 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20954 event pairs, 603 based on Foata normal form. 20/3930 useless extension candidates. Maximal degree in co-relation 29433. Up to 2495 conditions per place. [2024-06-03 20:12:10,037 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 188 selfloop transitions, 140 changer transitions 0/366 dead transitions. [2024-06-03 20:12:10,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 366 transitions, 5825 flow [2024-06-03 20:12:10,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:12:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:12:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 20:12:10,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-03 20:12:10,039 INFO L175 Difference]: Start difference. First operand has 191 places, 294 transitions, 4377 flow. Second operand 8 states and 156 transitions. [2024-06-03 20:12:10,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 366 transitions, 5825 flow [2024-06-03 20:12:10,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 366 transitions, 5770 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:10,348 INFO L231 Difference]: Finished difference. Result has 198 places, 324 transitions, 5203 flow [2024-06-03 20:12:10,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4322, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5203, PETRI_PLACES=198, PETRI_TRANSITIONS=324} [2024-06-03 20:12:10,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-03 20:12:10,349 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 324 transitions, 5203 flow [2024-06-03 20:12:10,349 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) [2024-06-03 20:12:10,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:10,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:10,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:12:10,350 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)] === [2024-06-03 20:12:10,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash 565333685, now seen corresponding path program 1 times [2024-06-03 20:12:10,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:10,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825588511] [2024-06-03 20:12:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:10,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:10,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:10,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825588511] [2024-06-03 20:12:10,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825588511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:10,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:10,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:10,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555409842] [2024-06-03 20:12:10,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:10,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:10,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:10,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:10,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:11,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:11,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 324 transitions, 5203 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) [2024-06-03 20:12:11,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:11,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:11,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:11,859 INFO L124 PetriNetUnfolderBase]: 2714/4123 cut-off events. [2024-06-03 20:12:11,859 INFO L125 PetriNetUnfolderBase]: For 150251/150269 co-relation queries the response was YES. [2024-06-03 20:12:11,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32558 conditions, 4123 events. 2714/4123 cut-off events. For 150251/150269 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21442 event pairs, 761 based on Foata normal form. 22/4144 useless extension candidates. Maximal degree in co-relation 32461. Up to 3645 conditions per place. [2024-06-03 20:12:11,901 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 259 selfloop transitions, 113 changer transitions 0/375 dead transitions. [2024-06-03 20:12:11,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 375 transitions, 6775 flow [2024-06-03 20:12:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:12:11,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:12:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:12:11,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-03 20:12:11,907 INFO L175 Difference]: Start difference. First operand has 198 places, 324 transitions, 5203 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:12:11,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 375 transitions, 6775 flow [2024-06-03 20:12:12,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 375 transitions, 6700 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-03 20:12:12,252 INFO L231 Difference]: Finished difference. Result has 205 places, 342 transitions, 5807 flow [2024-06-03 20:12:12,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5128, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5807, PETRI_PLACES=205, PETRI_TRANSITIONS=342} [2024-06-03 20:12:12,254 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-03 20:12:12,254 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 342 transitions, 5807 flow [2024-06-03 20:12:12,254 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) [2024-06-03 20:12:12,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:12,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:12,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:12:12,255 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)] === [2024-06-03 20:12:12,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:12,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1068337769, now seen corresponding path program 2 times [2024-06-03 20:12:12,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:12,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724222540] [2024-06-03 20:12:12,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:12,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:12,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:12,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724222540] [2024-06-03 20:12:12,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724222540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:12,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:12,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:12,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351760735] [2024-06-03 20:12:12,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:12,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:12,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:12,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:12,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:12,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:12,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 342 transitions, 5807 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) [2024-06-03 20:12:12,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:12,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:12,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:13,770 INFO L124 PetriNetUnfolderBase]: 2698/4101 cut-off events. [2024-06-03 20:12:13,770 INFO L125 PetriNetUnfolderBase]: For 151289/151293 co-relation queries the response was YES. [2024-06-03 20:12:13,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32553 conditions, 4101 events. 2698/4101 cut-off events. For 151289/151293 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21307 event pairs, 800 based on Foata normal form. 8/4108 useless extension candidates. Maximal degree in co-relation 32453. Up to 4002 conditions per place. [2024-06-03 20:12:13,815 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 323 selfloop transitions, 37 changer transitions 0/363 dead transitions. [2024-06-03 20:12:13,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 363 transitions, 6607 flow [2024-06-03 20:12:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-03 20:12:13,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-03 20:12:13,817 INFO L175 Difference]: Start difference. First operand has 205 places, 342 transitions, 5807 flow. Second operand 9 states and 136 transitions. [2024-06-03 20:12:13,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 363 transitions, 6607 flow [2024-06-03 20:12:14,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 363 transitions, 6370 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:14,157 INFO L231 Difference]: Finished difference. Result has 210 places, 342 transitions, 5655 flow [2024-06-03 20:12:14,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5570, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5655, PETRI_PLACES=210, PETRI_TRANSITIONS=342} [2024-06-03 20:12:14,158 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-03 20:12:14,158 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 342 transitions, 5655 flow [2024-06-03 20:12:14,158 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) [2024-06-03 20:12:14,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:14,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:14,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:12:14,159 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)] === [2024-06-03 20:12:14,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:14,159 INFO L85 PathProgramCache]: Analyzing trace with hash 758465363, now seen corresponding path program 2 times [2024-06-03 20:12:14,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:14,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365190990] [2024-06-03 20:12:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:14,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:15,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:15,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365190990] [2024-06-03 20:12:15,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365190990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:15,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:15,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:15,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638326572] [2024-06-03 20:12:15,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:15,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:15,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:15,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:15,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:15,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:15,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 342 transitions, 5655 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) [2024-06-03 20:12:15,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:15,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:15,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:16,243 INFO L124 PetriNetUnfolderBase]: 2807/4263 cut-off events. [2024-06-03 20:12:16,243 INFO L125 PetriNetUnfolderBase]: For 160463/160469 co-relation queries the response was YES. [2024-06-03 20:12:16,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33480 conditions, 4263 events. 2807/4263 cut-off events. For 160463/160469 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22298 event pairs, 753 based on Foata normal form. 9/4271 useless extension candidates. Maximal degree in co-relation 33379. Up to 3675 conditions per place. [2024-06-03 20:12:16,292 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 263 selfloop transitions, 138 changer transitions 0/404 dead transitions. [2024-06-03 20:12:16,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 404 transitions, 7280 flow [2024-06-03 20:12:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:12:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:12:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-03 20:12:16,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-03 20:12:16,293 INFO L175 Difference]: Start difference. First operand has 210 places, 342 transitions, 5655 flow. Second operand 10 states and 172 transitions. [2024-06-03 20:12:16,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 404 transitions, 7280 flow [2024-06-03 20:12:16,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 404 transitions, 7206 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:12:16,658 INFO L231 Difference]: Finished difference. Result has 213 places, 361 transitions, 6178 flow [2024-06-03 20:12:16,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5581, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6178, PETRI_PLACES=213, PETRI_TRANSITIONS=361} [2024-06-03 20:12:16,659 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-03 20:12:16,659 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 361 transitions, 6178 flow [2024-06-03 20:12:16,659 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) [2024-06-03 20:12:16,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:16,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:16,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:12:16,659 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)] === [2024-06-03 20:12:16,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:16,660 INFO L85 PathProgramCache]: Analyzing trace with hash 758704683, now seen corresponding path program 1 times [2024-06-03 20:12:16,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:16,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053467650] [2024-06-03 20:12:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:16,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:17,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:17,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053467650] [2024-06-03 20:12:17,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053467650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:17,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:17,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:17,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690991410] [2024-06-03 20:12:17,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:17,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:17,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:17,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:17,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:17,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:17,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 361 transitions, 6178 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) [2024-06-03 20:12:17,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:17,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:17,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:18,508 INFO L124 PetriNetUnfolderBase]: 3340/4998 cut-off events. [2024-06-03 20:12:18,508 INFO L125 PetriNetUnfolderBase]: For 210051/210067 co-relation queries the response was YES. [2024-06-03 20:12:18,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40770 conditions, 4998 events. 3340/4998 cut-off events. For 210051/210067 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26151 event pairs, 659 based on Foata normal form. 24/5021 useless extension candidates. Maximal degree in co-relation 40667. Up to 2961 conditions per place. [2024-06-03 20:12:18,559 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 278 selfloop transitions, 185 changer transitions 0/466 dead transitions. [2024-06-03 20:12:18,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 466 transitions, 8512 flow [2024-06-03 20:12:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 20:12:18,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-03 20:12:18,560 INFO L175 Difference]: Start difference. First operand has 213 places, 361 transitions, 6178 flow. Second operand 9 states and 172 transitions. [2024-06-03 20:12:18,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 466 transitions, 8512 flow [2024-06-03 20:12:19,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 466 transitions, 8346 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 20:12:19,037 INFO L231 Difference]: Finished difference. Result has 221 places, 408 transitions, 7322 flow [2024-06-03 20:12:19,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6012, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7322, PETRI_PLACES=221, PETRI_TRANSITIONS=408} [2024-06-03 20:12:19,038 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-03 20:12:19,038 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 408 transitions, 7322 flow [2024-06-03 20:12:19,038 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) [2024-06-03 20:12:19,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:19,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:19,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:12:19,039 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)] === [2024-06-03 20:12:19,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:19,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1969103093, now seen corresponding path program 3 times [2024-06-03 20:12:19,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:19,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78572336] [2024-06-03 20:12:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:19,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:19,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:19,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78572336] [2024-06-03 20:12:19,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78572336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:19,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:19,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:19,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713911481] [2024-06-03 20:12:19,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:19,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:19,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:19,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:19,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:19,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:19,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 408 transitions, 7322 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) [2024-06-03 20:12:19,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:19,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:19,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:21,144 INFO L124 PetriNetUnfolderBase]: 3485/5202 cut-off events. [2024-06-03 20:12:21,144 INFO L125 PetriNetUnfolderBase]: For 235277/235281 co-relation queries the response was YES. [2024-06-03 20:12:21,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45205 conditions, 5202 events. 3485/5202 cut-off events. For 235277/235281 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27322 event pairs, 933 based on Foata normal form. 13/5214 useless extension candidates. Maximal degree in co-relation 45096. Up to 4918 conditions per place. [2024-06-03 20:12:21,204 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 396 selfloop transitions, 63 changer transitions 0/462 dead transitions. [2024-06-03 20:12:21,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 462 transitions, 8947 flow [2024-06-03 20:12:21,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:12:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:12:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-03 20:12:21,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-03 20:12:21,205 INFO L175 Difference]: Start difference. First operand has 221 places, 408 transitions, 7322 flow. Second operand 10 states and 164 transitions. [2024-06-03 20:12:21,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 462 transitions, 8947 flow [2024-06-03 20:12:21,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 462 transitions, 8714 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-03 20:12:21,846 INFO L231 Difference]: Finished difference. Result has 230 places, 430 transitions, 7639 flow [2024-06-03 20:12:21,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7102, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7639, PETRI_PLACES=230, PETRI_TRANSITIONS=430} [2024-06-03 20:12:21,847 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-03 20:12:21,847 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 430 transitions, 7639 flow [2024-06-03 20:12:21,847 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) [2024-06-03 20:12:21,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:21,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:21,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:12:21,847 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:21,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1930673013, now seen corresponding path program 2 times [2024-06-03 20:12:21,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:21,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751172782] [2024-06-03 20:12:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:21,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:22,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:22,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751172782] [2024-06-03 20:12:22,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751172782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:22,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:22,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:22,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962513682] [2024-06-03 20:12:22,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:22,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:22,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:22,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:22,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:22,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:22,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 430 transitions, 7639 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) [2024-06-03 20:12:22,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:22,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:22,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:23,839 INFO L124 PetriNetUnfolderBase]: 3577/5330 cut-off events. [2024-06-03 20:12:23,839 INFO L125 PetriNetUnfolderBase]: For 253002/253006 co-relation queries the response was YES. [2024-06-03 20:12:23,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45973 conditions, 5330 events. 3577/5330 cut-off events. For 253002/253006 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28071 event pairs, 949 based on Foata normal form. 16/5345 useless extension candidates. Maximal degree in co-relation 45861. Up to 4922 conditions per place. [2024-06-03 20:12:23,901 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 392 selfloop transitions, 78 changer transitions 0/473 dead transitions. [2024-06-03 20:12:23,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 473 transitions, 9155 flow [2024-06-03 20:12:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:12:23,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:12:23,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-03 20:12:23,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-03 20:12:23,903 INFO L175 Difference]: Start difference. First operand has 230 places, 430 transitions, 7639 flow. Second operand 10 states and 166 transitions. [2024-06-03 20:12:23,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 473 transitions, 9155 flow [2024-06-03 20:12:24,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 473 transitions, 9029 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:24,497 INFO L231 Difference]: Finished difference. Result has 237 places, 440 transitions, 7891 flow [2024-06-03 20:12:24,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7523, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7891, PETRI_PLACES=237, PETRI_TRANSITIONS=440} [2024-06-03 20:12:24,498 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-03 20:12:24,498 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 440 transitions, 7891 flow [2024-06-03 20:12:24,498 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) [2024-06-03 20:12:24,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:24,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:24,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:12:24,499 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:24,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:24,499 INFO L85 PathProgramCache]: Analyzing trace with hash 767046783, now seen corresponding path program 3 times [2024-06-03 20:12:24,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:24,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161304863] [2024-06-03 20:12:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:24,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:25,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:25,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161304863] [2024-06-03 20:12:25,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161304863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:25,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:25,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:25,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972634368] [2024-06-03 20:12:25,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:25,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:25,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:25,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:25,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:25,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:25,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 440 transitions, 7891 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) [2024-06-03 20:12:25,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:25,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:25,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:26,523 INFO L124 PetriNetUnfolderBase]: 3595/5356 cut-off events. [2024-06-03 20:12:26,523 INFO L125 PetriNetUnfolderBase]: For 255517/255521 co-relation queries the response was YES. [2024-06-03 20:12:26,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46522 conditions, 5356 events. 3595/5356 cut-off events. For 255517/255521 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 28187 event pairs, 947 based on Foata normal form. 10/5365 useless extension candidates. Maximal degree in co-relation 46407. Up to 4942 conditions per place. [2024-06-03 20:12:26,586 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 394 selfloop transitions, 80 changer transitions 0/477 dead transitions. [2024-06-03 20:12:26,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 477 transitions, 9299 flow [2024-06-03 20:12:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:12:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:12:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-03 20:12:26,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 20:12:26,587 INFO L175 Difference]: Start difference. First operand has 237 places, 440 transitions, 7891 flow. Second operand 11 states and 176 transitions. [2024-06-03 20:12:26,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 477 transitions, 9299 flow [2024-06-03 20:12:27,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 477 transitions, 9071 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-03 20:12:27,249 INFO L231 Difference]: Finished difference. Result has 243 places, 444 transitions, 7924 flow [2024-06-03 20:12:27,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7672, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7924, PETRI_PLACES=243, PETRI_TRANSITIONS=444} [2024-06-03 20:12:27,249 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-03 20:12:27,249 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 444 transitions, 7924 flow [2024-06-03 20:12:27,250 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) [2024-06-03 20:12:27,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:27,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:27,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:12:27,250 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:27,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:27,251 INFO L85 PathProgramCache]: Analyzing trace with hash 619940895, now seen corresponding path program 4 times [2024-06-03 20:12:27,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:27,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777394527] [2024-06-03 20:12:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:27,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:28,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:28,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777394527] [2024-06-03 20:12:28,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777394527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:28,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:28,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:28,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798875064] [2024-06-03 20:12:28,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:28,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:28,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:28,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:28,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:28,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:28,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 444 transitions, 7924 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:28,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:28,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:28,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:29,338 INFO L124 PetriNetUnfolderBase]: 3770/5603 cut-off events. [2024-06-03 20:12:29,339 INFO L125 PetriNetUnfolderBase]: For 274786/274792 co-relation queries the response was YES. [2024-06-03 20:12:29,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48781 conditions, 5603 events. 3770/5603 cut-off events. For 274786/274792 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 29670 event pairs, 769 based on Foata normal form. 8/5610 useless extension candidates. Maximal degree in co-relation 48664. Up to 3751 conditions per place. [2024-06-03 20:12:29,413 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 247 selfloop transitions, 287 changer transitions 0/537 dead transitions. [2024-06-03 20:12:29,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 537 transitions, 10251 flow [2024-06-03 20:12:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:12:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:12:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 20:12:29,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-03 20:12:29,415 INFO L175 Difference]: Start difference. First operand has 243 places, 444 transitions, 7924 flow. Second operand 8 states and 153 transitions. [2024-06-03 20:12:29,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 537 transitions, 10251 flow [2024-06-03 20:12:30,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 537 transitions, 10088 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:30,090 INFO L231 Difference]: Finished difference. Result has 247 places, 495 transitions, 9509 flow [2024-06-03 20:12:30,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9509, PETRI_PLACES=247, PETRI_TRANSITIONS=495} [2024-06-03 20:12:30,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-03 20:12:30,091 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 495 transitions, 9509 flow [2024-06-03 20:12:30,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:30,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:30,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:30,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:12:30,092 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)] === [2024-06-03 20:12:30,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:30,093 INFO L85 PathProgramCache]: Analyzing trace with hash 620180215, now seen corresponding path program 4 times [2024-06-03 20:12:30,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:30,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147566455] [2024-06-03 20:12:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:30,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:30,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:30,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147566455] [2024-06-03 20:12:30,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147566455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:30,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:30,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:30,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745633449] [2024-06-03 20:12:30,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:30,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:30,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:30,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:30,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:30,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:30,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 495 transitions, 9509 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:30,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:30,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:30,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:32,074 INFO L124 PetriNetUnfolderBase]: 3926/5820 cut-off events. [2024-06-03 20:12:32,074 INFO L125 PetriNetUnfolderBase]: For 314312/314318 co-relation queries the response was YES. [2024-06-03 20:12:32,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54217 conditions, 5820 events. 3926/5820 cut-off events. For 314312/314318 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 30816 event pairs, 733 based on Foata normal form. 16/5835 useless extension candidates. Maximal degree in co-relation 54096. Up to 3320 conditions per place. [2024-06-03 20:12:32,148 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 239 selfloop transitions, 307 changer transitions 0/549 dead transitions. [2024-06-03 20:12:32,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 549 transitions, 11436 flow [2024-06-03 20:12:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:12:32,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:12:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 20:12:32,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-03 20:12:32,150 INFO L175 Difference]: Start difference. First operand has 247 places, 495 transitions, 9509 flow. Second operand 8 states and 151 transitions. [2024-06-03 20:12:32,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 549 transitions, 11436 flow [2024-06-03 20:12:33,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 549 transitions, 11273 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-03 20:12:33,093 INFO L231 Difference]: Finished difference. Result has 254 places, 511 transitions, 10431 flow [2024-06-03 20:12:33,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9360, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10431, PETRI_PLACES=254, PETRI_TRANSITIONS=511} [2024-06-03 20:12:33,094 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-03 20:12:33,094 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 511 transitions, 10431 flow [2024-06-03 20:12:33,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:33,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:33,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:33,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:12:33,095 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)] === [2024-06-03 20:12:33,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:33,095 INFO L85 PathProgramCache]: Analyzing trace with hash 620179905, now seen corresponding path program 5 times [2024-06-03 20:12:33,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:33,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526796186] [2024-06-03 20:12:33,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:33,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:33,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:33,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526796186] [2024-06-03 20:12:33,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526796186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:33,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:33,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:33,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510246516] [2024-06-03 20:12:33,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:33,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:33,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:33,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:33,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:33,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:33,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 511 transitions, 10431 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:33,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:33,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:33,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:35,138 INFO L124 PetriNetUnfolderBase]: 3882/5771 cut-off events. [2024-06-03 20:12:35,138 INFO L125 PetriNetUnfolderBase]: For 322673/322679 co-relation queries the response was YES. [2024-06-03 20:12:35,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55372 conditions, 5771 events. 3882/5771 cut-off events. For 322673/322679 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 30659 event pairs, 829 based on Foata normal form. 20/5790 useless extension candidates. Maximal degree in co-relation 55248. Up to 4245 conditions per place. [2024-06-03 20:12:35,213 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 304 selfloop transitions, 245 changer transitions 0/552 dead transitions. [2024-06-03 20:12:35,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 552 transitions, 12085 flow [2024-06-03 20:12:35,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:12:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:12:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 20:12:35,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-03 20:12:35,214 INFO L175 Difference]: Start difference. First operand has 254 places, 511 transitions, 10431 flow. Second operand 8 states and 148 transitions. [2024-06-03 20:12:35,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 552 transitions, 12085 flow [2024-06-03 20:12:36,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 552 transitions, 11595 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:36,076 INFO L231 Difference]: Finished difference. Result has 258 places, 512 transitions, 10495 flow [2024-06-03 20:12:36,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9945, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10495, PETRI_PLACES=258, PETRI_TRANSITIONS=512} [2024-06-03 20:12:36,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-03 20:12:36,077 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 512 transitions, 10495 flow [2024-06-03 20:12:36,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:36,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:36,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:36,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:12:36,077 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)] === [2024-06-03 20:12:36,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:36,078 INFO L85 PathProgramCache]: Analyzing trace with hash 623754143, now seen corresponding path program 3 times [2024-06-03 20:12:36,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:36,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23645378] [2024-06-03 20:12:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:36,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:36,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:36,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23645378] [2024-06-03 20:12:36,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23645378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:36,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:36,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:12:36,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438207847] [2024-06-03 20:12:36,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:36,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:12:36,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:36,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:12:36,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:12:36,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:36,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 512 transitions, 10495 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:12:36,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:36,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:36,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:37,956 INFO L124 PetriNetUnfolderBase]: 3924/5820 cut-off events. [2024-06-03 20:12:37,956 INFO L125 PetriNetUnfolderBase]: For 333794/333816 co-relation queries the response was YES. [2024-06-03 20:12:38,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55859 conditions, 5820 events. 3924/5820 cut-off events. For 333794/333816 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 30852 event pairs, 930 based on Foata normal form. 32/5851 useless extension candidates. Maximal degree in co-relation 55734. Up to 5168 conditions per place. [2024-06-03 20:12:38,034 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 377 selfloop transitions, 181 changer transitions 0/561 dead transitions. [2024-06-03 20:12:38,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 561 transitions, 12581 flow [2024-06-03 20:12:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:12:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:12:38,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:12:38,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:12:38,041 INFO L175 Difference]: Start difference. First operand has 258 places, 512 transitions, 10495 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:12:38,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 561 transitions, 12581 flow [2024-06-03 20:12:38,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 561 transitions, 12177 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:38,971 INFO L231 Difference]: Finished difference. Result has 262 places, 534 transitions, 11193 flow [2024-06-03 20:12:38,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10112, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11193, PETRI_PLACES=262, PETRI_TRANSITIONS=534} [2024-06-03 20:12:38,971 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-03 20:12:38,972 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 534 transitions, 11193 flow [2024-06-03 20:12:38,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:12:38,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:38,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:38,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:12:38,972 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)] === [2024-06-03 20:12:38,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:38,973 INFO L85 PathProgramCache]: Analyzing trace with hash 628515743, now seen corresponding path program 4 times [2024-06-03 20:12:38,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:38,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420257657] [2024-06-03 20:12:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:38,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:39,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:39,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420257657] [2024-06-03 20:12:39,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420257657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:39,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:39,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:12:39,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113474382] [2024-06-03 20:12:39,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:39,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:12:39,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:39,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:12:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:12:39,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:39,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 534 transitions, 11193 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:12:39,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:39,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:39,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:41,002 INFO L124 PetriNetUnfolderBase]: 3908/5796 cut-off events. [2024-06-03 20:12:41,002 INFO L125 PetriNetUnfolderBase]: For 329931/329935 co-relation queries the response was YES. [2024-06-03 20:12:41,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55395 conditions, 5796 events. 3908/5796 cut-off events. For 329931/329935 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30696 event pairs, 1047 based on Foata normal form. 8/5803 useless extension candidates. Maximal degree in co-relation 55268. Up to 5671 conditions per place. [2024-06-03 20:12:41,094 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 501 selfloop transitions, 49 changer transitions 0/553 dead transitions. [2024-06-03 20:12:41,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 553 transitions, 12379 flow [2024-06-03 20:12:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:12:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:12:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 20:12:41,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-03 20:12:41,096 INFO L175 Difference]: Start difference. First operand has 262 places, 534 transitions, 11193 flow. Second operand 8 states and 121 transitions. [2024-06-03 20:12:41,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 553 transitions, 12379 flow [2024-06-03 20:12:42,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 553 transitions, 11999 flow, removed 115 selfloop flow, removed 3 redundant places. [2024-06-03 20:12:42,203 INFO L231 Difference]: Finished difference. Result has 267 places, 534 transitions, 10931 flow [2024-06-03 20:12:42,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10813, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10931, PETRI_PLACES=267, PETRI_TRANSITIONS=534} [2024-06-03 20:12:42,204 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-03 20:12:42,204 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 534 transitions, 10931 flow [2024-06-03 20:12:42,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:12:42,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:42,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:42,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:12:42,205 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)] === [2024-06-03 20:12:42,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:42,205 INFO L85 PathProgramCache]: Analyzing trace with hash 628511775, now seen corresponding path program 6 times [2024-06-03 20:12:42,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:42,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591128147] [2024-06-03 20:12:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:42,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:43,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:43,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591128147] [2024-06-03 20:12:43,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591128147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:43,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:43,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:43,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570689823] [2024-06-03 20:12:43,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:43,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:43,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:43,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:43,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:43,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:43,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 534 transitions, 10931 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:43,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:43,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:43,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:44,471 INFO L124 PetriNetUnfolderBase]: 3923/5817 cut-off events. [2024-06-03 20:12:44,471 INFO L125 PetriNetUnfolderBase]: For 328109/328113 co-relation queries the response was YES. [2024-06-03 20:12:44,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54905 conditions, 5817 events. 3923/5817 cut-off events. For 328109/328113 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 30831 event pairs, 1047 based on Foata normal form. 7/5823 useless extension candidates. Maximal degree in co-relation 54777. Up to 5670 conditions per place. [2024-06-03 20:12:44,548 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 499 selfloop transitions, 57 changer transitions 0/559 dead transitions. [2024-06-03 20:12:44,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 559 transitions, 12220 flow [2024-06-03 20:12:44,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-03 20:12:44,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2024-06-03 20:12:44,549 INFO L175 Difference]: Start difference. First operand has 267 places, 534 transitions, 10931 flow. Second operand 9 states and 134 transitions. [2024-06-03 20:12:44,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 559 transitions, 12220 flow [2024-06-03 20:12:45,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 559 transitions, 12119 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 20:12:45,477 INFO L231 Difference]: Finished difference. Result has 268 places, 538 transitions, 11045 flow [2024-06-03 20:12:45,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10830, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11045, PETRI_PLACES=268, PETRI_TRANSITIONS=538} [2024-06-03 20:12:45,478 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-03 20:12:45,478 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 538 transitions, 11045 flow [2024-06-03 20:12:45,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:45,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:45,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:45,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:12:45,479 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)] === [2024-06-03 20:12:45,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1565148417, now seen corresponding path program 5 times [2024-06-03 20:12:45,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:45,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592507755] [2024-06-03 20:12:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:46,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:46,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592507755] [2024-06-03 20:12:46,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592507755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:46,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:46,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:46,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106662589] [2024-06-03 20:12:46,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:46,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:46,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:46,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:46,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:46,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:46,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 538 transitions, 11045 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:46,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:46,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:46,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:47,789 INFO L124 PetriNetUnfolderBase]: 4249/6267 cut-off events. [2024-06-03 20:12:47,790 INFO L125 PetriNetUnfolderBase]: For 377493/377497 co-relation queries the response was YES. [2024-06-03 20:12:47,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60299 conditions, 6267 events. 4249/6267 cut-off events. For 377493/377497 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33421 event pairs, 1023 based on Foata normal form. 10/6276 useless extension candidates. Maximal degree in co-relation 60171. Up to 5511 conditions per place. [2024-06-03 20:12:47,874 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 481 selfloop transitions, 113 changer transitions 0/597 dead transitions. [2024-06-03 20:12:47,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 597 transitions, 13225 flow [2024-06-03 20:12:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:12:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:12:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-03 20:12:47,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-03 20:12:47,876 INFO L175 Difference]: Start difference. First operand has 268 places, 538 transitions, 11045 flow. Second operand 10 states and 161 transitions. [2024-06-03 20:12:47,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 597 transitions, 13225 flow [2024-06-03 20:12:48,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 597 transitions, 13111 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:12:48,865 INFO L231 Difference]: Finished difference. Result has 274 places, 562 transitions, 11763 flow [2024-06-03 20:12:48,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10931, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11763, PETRI_PLACES=274, PETRI_TRANSITIONS=562} [2024-06-03 20:12:48,866 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-03 20:12:48,866 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 562 transitions, 11763 flow [2024-06-03 20:12:48,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:48,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:48,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:48,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:12:48,867 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)] === [2024-06-03 20:12:48,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:48,867 INFO L85 PathProgramCache]: Analyzing trace with hash -635933489, now seen corresponding path program 6 times [2024-06-03 20:12:48,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:48,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920317112] [2024-06-03 20:12:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:48,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:49,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:49,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920317112] [2024-06-03 20:12:49,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920317112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:49,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:49,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:12:49,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450835309] [2024-06-03 20:12:49,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:49,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:12:49,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:49,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:12:49,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:12:49,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:49,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 562 transitions, 11763 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:49,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:49,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:49,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:51,054 INFO L124 PetriNetUnfolderBase]: 4213/6219 cut-off events. [2024-06-03 20:12:51,055 INFO L125 PetriNetUnfolderBase]: For 388606/388610 co-relation queries the response was YES. [2024-06-03 20:12:51,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60888 conditions, 6219 events. 4213/6219 cut-off events. For 388606/388610 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33107 event pairs, 1019 based on Foata normal form. 16/6234 useless extension candidates. Maximal degree in co-relation 60757. Up to 5495 conditions per place. [2024-06-03 20:12:51,147 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 478 selfloop transitions, 115 changer transitions 0/596 dead transitions. [2024-06-03 20:12:51,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 596 transitions, 13477 flow [2024-06-03 20:12:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:51,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 20:12:51,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-03 20:12:51,148 INFO L175 Difference]: Start difference. First operand has 274 places, 562 transitions, 11763 flow. Second operand 9 states and 151 transitions. [2024-06-03 20:12:51,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 596 transitions, 13477 flow [2024-06-03 20:12:52,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 596 transitions, 13284 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-03 20:12:52,296 INFO L231 Difference]: Finished difference. Result has 278 places, 565 transitions, 11972 flow [2024-06-03 20:12:52,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11576, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11972, PETRI_PLACES=278, PETRI_TRANSITIONS=565} [2024-06-03 20:12:52,297 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 237 predicate places. [2024-06-03 20:12:52,297 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 565 transitions, 11972 flow [2024-06-03 20:12:52,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:52,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:52,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:52,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:12:52,298 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)] === [2024-06-03 20:12:52,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:52,298 INFO L85 PathProgramCache]: Analyzing trace with hash 865313525, now seen corresponding path program 5 times [2024-06-03 20:12:52,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:52,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555605637] [2024-06-03 20:12:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:52,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:52,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:52,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555605637] [2024-06-03 20:12:52,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555605637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:52,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:52,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:12:52,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369074366] [2024-06-03 20:12:52,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:52,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:12:52,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:52,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:12:52,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:12:52,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:52,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 565 transitions, 11972 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:12:52,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:52,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:52,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:54,355 INFO L124 PetriNetUnfolderBase]: 4214/6230 cut-off events. [2024-06-03 20:12:54,355 INFO L125 PetriNetUnfolderBase]: For 378875/378875 co-relation queries the response was YES. [2024-06-03 20:12:54,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61090 conditions, 6230 events. 4214/6230 cut-off events. For 378875/378875 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33304 event pairs, 1276 based on Foata normal form. 5/6234 useless extension candidates. Maximal degree in co-relation 60957. Up to 6092 conditions per place. [2024-06-03 20:12:54,444 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 540 selfloop transitions, 48 changer transitions 0/591 dead transitions. [2024-06-03 20:12:54,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 591 transitions, 13509 flow [2024-06-03 20:12:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:12:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:12:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-03 20:12:54,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 20:12:54,445 INFO L175 Difference]: Start difference. First operand has 278 places, 565 transitions, 11972 flow. Second operand 7 states and 110 transitions. [2024-06-03 20:12:54,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 591 transitions, 13509 flow [2024-06-03 20:12:55,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 591 transitions, 13341 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:55,688 INFO L231 Difference]: Finished difference. Result has 281 places, 570 transitions, 12063 flow [2024-06-03 20:12:55,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11804, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12063, PETRI_PLACES=281, PETRI_TRANSITIONS=570} [2024-06-03 20:12:55,689 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-03 20:12:55,689 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 570 transitions, 12063 flow [2024-06-03 20:12:55,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:12:55,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:55,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:55,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:12:55,690 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)] === [2024-06-03 20:12:55,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:55,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1830339487, now seen corresponding path program 6 times [2024-06-03 20:12:55,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:55,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046621589] [2024-06-03 20:12:55,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:55,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:56,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:56,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046621589] [2024-06-03 20:12:56,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046621589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:56,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:56,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:12:56,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562028514] [2024-06-03 20:12:56,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:56,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:12:56,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:56,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:12:56,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:12:56,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:56,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 570 transitions, 12063 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:12:56,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:56,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:56,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:57,820 INFO L124 PetriNetUnfolderBase]: 4208/6222 cut-off events. [2024-06-03 20:12:57,821 INFO L125 PetriNetUnfolderBase]: For 384515/384515 co-relation queries the response was YES. [2024-06-03 20:12:57,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60669 conditions, 6222 events. 4208/6222 cut-off events. For 384515/384515 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33241 event pairs, 1284 based on Foata normal form. 2/6223 useless extension candidates. Maximal degree in co-relation 60535. Up to 6142 conditions per place. [2024-06-03 20:12:57,894 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 558 selfloop transitions, 22 changer transitions 0/583 dead transitions. [2024-06-03 20:12:57,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 583 transitions, 13278 flow [2024-06-03 20:12:57,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:12:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:12:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-03 20:12:57,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-03 20:12:57,895 INFO L175 Difference]: Start difference. First operand has 281 places, 570 transitions, 12063 flow. Second operand 7 states and 104 transitions. [2024-06-03 20:12:57,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 583 transitions, 13278 flow [2024-06-03 20:12:59,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 583 transitions, 12728 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:59,038 INFO L231 Difference]: Finished difference. Result has 281 places, 570 transitions, 11565 flow [2024-06-03 20:12:59,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11513, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11565, PETRI_PLACES=281, PETRI_TRANSITIONS=570} [2024-06-03 20:12:59,039 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-03 20:12:59,039 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 570 transitions, 11565 flow [2024-06-03 20:12:59,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:12:59,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:59,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:59,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:12:59,040 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:59,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:59,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1239583199, now seen corresponding path program 7 times [2024-06-03 20:12:59,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:59,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494107855] [2024-06-03 20:12:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:59,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:59,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:59,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494107855] [2024-06-03 20:12:59,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494107855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:59,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:59,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:12:59,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373229327] [2024-06-03 20:12:59,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:59,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:12:59,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:59,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:12:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:12:59,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:12:59,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 570 transitions, 11565 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:12:59,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:59,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:12:59,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:01,301 INFO L124 PetriNetUnfolderBase]: 4202/6213 cut-off events. [2024-06-03 20:13:01,302 INFO L125 PetriNetUnfolderBase]: For 383122/383122 co-relation queries the response was YES. [2024-06-03 20:13:01,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60140 conditions, 6213 events. 4202/6213 cut-off events. For 383122/383122 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33165 event pairs, 1269 based on Foata normal form. 2/6214 useless extension candidates. Maximal degree in co-relation 60007. Up to 6110 conditions per place. [2024-06-03 20:13:01,395 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 555 selfloop transitions, 29 changer transitions 0/587 dead transitions. [2024-06-03 20:13:01,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 587 transitions, 12833 flow [2024-06-03 20:13:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:13:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:13:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-03 20:13:01,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-03 20:13:01,397 INFO L175 Difference]: Start difference. First operand has 281 places, 570 transitions, 11565 flow. Second operand 6 states and 97 transitions. [2024-06-03 20:13:01,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 587 transitions, 12833 flow [2024-06-03 20:13:02,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 587 transitions, 12687 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-03 20:13:02,435 INFO L231 Difference]: Finished difference. Result has 281 places, 570 transitions, 11496 flow [2024-06-03 20:13:02,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11419, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11496, PETRI_PLACES=281, PETRI_TRANSITIONS=570} [2024-06-03 20:13:02,436 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-03 20:13:02,436 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 570 transitions, 11496 flow [2024-06-03 20:13:02,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:13:02,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:02,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:02,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:13:02,436 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)] === [2024-06-03 20:13:02,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:02,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1945596097, now seen corresponding path program 8 times [2024-06-03 20:13:02,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:02,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188578370] [2024-06-03 20:13:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:02,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:03,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:03,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188578370] [2024-06-03 20:13:03,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188578370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:03,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:03,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:13:03,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723263154] [2024-06-03 20:13:03,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:03,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:13:03,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:03,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:13:03,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:13:03,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:13:03,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 570 transitions, 11496 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:13:03,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:03,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:13:03,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:04,594 INFO L124 PetriNetUnfolderBase]: 4186/6184 cut-off events. [2024-06-03 20:13:04,594 INFO L125 PetriNetUnfolderBase]: For 392955/392975 co-relation queries the response was YES. [2024-06-03 20:13:04,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59919 conditions, 6184 events. 4186/6184 cut-off events. For 392955/392975 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 32937 event pairs, 995 based on Foata normal form. 24/6207 useless extension candidates. Maximal degree in co-relation 59786. Up to 5813 conditions per place. [2024-06-03 20:13:04,669 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 510 selfloop transitions, 87 changer transitions 0/600 dead transitions. [2024-06-03 20:13:04,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 600 transitions, 12878 flow [2024-06-03 20:13:04,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:13:04,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:13:04,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-03 20:13:04,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-03 20:13:04,671 INFO L175 Difference]: Start difference. First operand has 281 places, 570 transitions, 11496 flow. Second operand 7 states and 119 transitions. [2024-06-03 20:13:04,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 600 transitions, 12878 flow [2024-06-03 20:13:05,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 600 transitions, 12784 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:13:05,877 INFO L231 Difference]: Finished difference. Result has 283 places, 570 transitions, 11614 flow [2024-06-03 20:13:05,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11402, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11614, PETRI_PLACES=283, PETRI_TRANSITIONS=570} [2024-06-03 20:13:05,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-03 20:13:05,878 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 570 transitions, 11614 flow [2024-06-03 20:13:05,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 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) [2024-06-03 20:13:05,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:05,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:05,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:13:05,879 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)] === [2024-06-03 20:13:05,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:05,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1739679783, now seen corresponding path program 7 times [2024-06-03 20:13:05,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:05,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189122958] [2024-06-03 20:13:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:05,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:06,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:06,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189122958] [2024-06-03 20:13:06,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189122958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:06,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:06,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:13:06,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786838277] [2024-06-03 20:13:06,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:06,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:13:06,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:06,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:13:06,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:13:06,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:13:06,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 570 transitions, 11614 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:06,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:06,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:13:06,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:08,372 INFO L124 PetriNetUnfolderBase]: 4333/6391 cut-off events. [2024-06-03 20:13:08,373 INFO L125 PetriNetUnfolderBase]: For 429473/429477 co-relation queries the response was YES. [2024-06-03 20:13:08,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63064 conditions, 6391 events. 4333/6391 cut-off events. For 429473/429477 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 34163 event pairs, 890 based on Foata normal form. 13/6403 useless extension candidates. Maximal degree in co-relation 62930. Up to 5572 conditions per place. [2024-06-03 20:13:08,456 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 466 selfloop transitions, 160 changer transitions 0/629 dead transitions. [2024-06-03 20:13:08,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 629 transitions, 13625 flow [2024-06-03 20:13:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:13:08,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:13:08,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 20:13:08,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-03 20:13:08,457 INFO L175 Difference]: Start difference. First operand has 283 places, 570 transitions, 11614 flow. Second operand 8 states and 155 transitions. [2024-06-03 20:13:08,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 629 transitions, 13625 flow [2024-06-03 20:13:09,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 629 transitions, 13387 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 20:13:09,630 INFO L231 Difference]: Finished difference. Result has 286 places, 581 transitions, 12159 flow [2024-06-03 20:13:09,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11380, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12159, PETRI_PLACES=286, PETRI_TRANSITIONS=581} [2024-06-03 20:13:09,642 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 245 predicate places. [2024-06-03 20:13:09,642 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 581 transitions, 12159 flow [2024-06-03 20:13:09,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:09,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:09,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:09,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:13:09,642 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)] === [2024-06-03 20:13:09,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:09,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1957983201, now seen corresponding path program 1 times [2024-06-03 20:13:09,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:09,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442440155] [2024-06-03 20:13:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:09,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:10,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:10,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442440155] [2024-06-03 20:13:10,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442440155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:10,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:10,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:13:10,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5800305] [2024-06-03 20:13:10,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:10,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:13:10,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:10,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:13:10,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:13:10,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:13:10,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 581 transitions, 12159 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:10,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:10,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:13:10,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:11,889 INFO L124 PetriNetUnfolderBase]: 4330/6393 cut-off events. [2024-06-03 20:13:11,890 INFO L125 PetriNetUnfolderBase]: For 428968/428968 co-relation queries the response was YES. [2024-06-03 20:13:11,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64124 conditions, 6393 events. 4330/6393 cut-off events. For 428968/428968 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 34237 event pairs, 1298 based on Foata normal form. 1/6393 useless extension candidates. Maximal degree in co-relation 63988. Up to 6319 conditions per place. [2024-06-03 20:13:11,973 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 566 selfloop transitions, 21 changer transitions 0/590 dead transitions. [2024-06-03 20:13:11,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 590 transitions, 13366 flow [2024-06-03 20:13:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:13:11,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:13:11,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-03 20:13:11,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 20:13:11,974 INFO L175 Difference]: Start difference. First operand has 286 places, 581 transitions, 12159 flow. Second operand 6 states and 90 transitions. [2024-06-03 20:13:11,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 590 transitions, 13366 flow [2024-06-03 20:13:13,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 590 transitions, 13114 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-03 20:13:13,179 INFO L231 Difference]: Finished difference. Result has 287 places, 581 transitions, 11961 flow [2024-06-03 20:13:13,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11907, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11961, PETRI_PLACES=287, PETRI_TRANSITIONS=581} [2024-06-03 20:13:13,180 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-03 20:13:13,181 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 581 transitions, 11961 flow [2024-06-03 20:13:13,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:13,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:13,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:13,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:13:13,181 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)] === [2024-06-03 20:13:13,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:13,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1926000041, now seen corresponding path program 7 times [2024-06-03 20:13:13,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:13,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331323114] [2024-06-03 20:13:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:13,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:13,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:13,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331323114] [2024-06-03 20:13:13,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331323114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:13,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:13,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:13:13,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89441367] [2024-06-03 20:13:13,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:13,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:13:13,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:13:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:13:13,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:13:13,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 581 transitions, 11961 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:13,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:13,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:13:13,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:15,463 INFO L124 PetriNetUnfolderBase]: 4430/6526 cut-off events. [2024-06-03 20:13:15,464 INFO L125 PetriNetUnfolderBase]: For 456229/456233 co-relation queries the response was YES. [2024-06-03 20:13:15,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64785 conditions, 6526 events. 4430/6526 cut-off events. For 456229/456233 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34878 event pairs, 833 based on Foata normal form. 16/6541 useless extension candidates. Maximal degree in co-relation 64649. Up to 5518 conditions per place. [2024-06-03 20:13:15,548 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 470 selfloop transitions, 158 changer transitions 0/631 dead transitions. [2024-06-03 20:13:15,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 631 transitions, 13890 flow [2024-06-03 20:13:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:13:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:13:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:13:15,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-03 20:13:15,549 INFO L175 Difference]: Start difference. First operand has 287 places, 581 transitions, 11961 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:13:15,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 631 transitions, 13890 flow [2024-06-03 20:13:16,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 631 transitions, 13814 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 20:13:16,645 INFO L231 Difference]: Finished difference. Result has 292 places, 592 transitions, 12655 flow [2024-06-03 20:13:16,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11889, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12655, PETRI_PLACES=292, PETRI_TRANSITIONS=592} [2024-06-03 20:13:16,646 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-03 20:13:16,646 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 592 transitions, 12655 flow [2024-06-03 20:13:16,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:16,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:16,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:16,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:13:16,646 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)] === [2024-06-03 20:13:16,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:16,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1945948629, now seen corresponding path program 8 times [2024-06-03 20:13:16,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:16,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549124598] [2024-06-03 20:13:16,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:16,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:17,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:17,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549124598] [2024-06-03 20:13:17,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549124598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:17,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:17,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:13:17,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672171814] [2024-06-03 20:13:17,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:17,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:13:17,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:17,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:13:17,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:13:17,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:13:17,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 592 transitions, 12655 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:17,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:17,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:13:17,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:19,058 INFO L124 PetriNetUnfolderBase]: 4537/6682 cut-off events. [2024-06-03 20:13:19,059 INFO L125 PetriNetUnfolderBase]: For 479678/479678 co-relation queries the response was YES. [2024-06-03 20:13:19,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68371 conditions, 6682 events. 4537/6682 cut-off events. For 479678/479678 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35958 event pairs, 1311 based on Foata normal form. 6/6687 useless extension candidates. Maximal degree in co-relation 68232. Up to 6462 conditions per place. [2024-06-03 20:13:19,166 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 578 selfloop transitions, 46 changer transitions 0/627 dead transitions. [2024-06-03 20:13:19,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 627 transitions, 14407 flow [2024-06-03 20:13:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-03 20:13:19,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-03 20:13:19,168 INFO L175 Difference]: Start difference. First operand has 292 places, 592 transitions, 12655 flow. Second operand 9 states and 138 transitions. [2024-06-03 20:13:19,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 627 transitions, 14407 flow [2024-06-03 20:13:20,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 627 transitions, 14153 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-03 20:13:20,388 INFO L231 Difference]: Finished difference. Result has 299 places, 605 transitions, 12836 flow [2024-06-03 20:13:20,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12411, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12836, PETRI_PLACES=299, PETRI_TRANSITIONS=605} [2024-06-03 20:13:20,388 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-03 20:13:20,389 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 605 transitions, 12836 flow [2024-06-03 20:13:20,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:20,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:20,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:20,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:13:20,389 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)] === [2024-06-03 20:13:20,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:20,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1945602669, now seen corresponding path program 9 times [2024-06-03 20:13:20,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:20,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323370177] [2024-06-03 20:13:20,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:20,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:21,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:21,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323370177] [2024-06-03 20:13:21,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323370177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:21,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:21,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:13:21,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844719184] [2024-06-03 20:13:21,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:21,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:13:21,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:21,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:13:21,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:13:21,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:13:21,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 605 transitions, 12836 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:21,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:21,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:13:21,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:22,880 INFO L124 PetriNetUnfolderBase]: 4629/6802 cut-off events. [2024-06-03 20:13:22,880 INFO L125 PetriNetUnfolderBase]: For 503308/503327 co-relation queries the response was YES. [2024-06-03 20:13:22,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70604 conditions, 6802 events. 4629/6802 cut-off events. For 503308/503327 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 36453 event pairs, 804 based on Foata normal form. 24/6825 useless extension candidates. Maximal degree in co-relation 70462. Up to 5616 conditions per place. [2024-06-03 20:13:22,959 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 504 selfloop transitions, 144 changer transitions 0/651 dead transitions. [2024-06-03 20:13:22,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 651 transitions, 14867 flow [2024-06-03 20:13:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:13:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:13:22,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:13:22,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-03 20:13:22,961 INFO L175 Difference]: Start difference. First operand has 299 places, 605 transitions, 12836 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:13:22,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 651 transitions, 14867 flow [2024-06-03 20:13:24,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 651 transitions, 14728 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-03 20:13:24,146 INFO L231 Difference]: Finished difference. Result has 306 places, 617 transitions, 13469 flow [2024-06-03 20:13:24,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12697, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13469, PETRI_PLACES=306, PETRI_TRANSITIONS=617} [2024-06-03 20:13:24,146 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-03 20:13:24,146 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 617 transitions, 13469 flow [2024-06-03 20:13:24,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:24,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:24,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:24,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:13:24,147 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)] === [2024-06-03 20:13:24,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1830229313, now seen corresponding path program 1 times [2024-06-03 20:13:24,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:24,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298537331] [2024-06-03 20:13:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:24,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:25,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:25,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298537331] [2024-06-03 20:13:25,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298537331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:25,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:25,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:25,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138234838] [2024-06-03 20:13:25,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:25,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:25,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:25,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:25,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:25,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:13:25,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 617 transitions, 13469 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) [2024-06-03 20:13:25,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:25,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:13:25,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:26,885 INFO L124 PetriNetUnfolderBase]: 4637/6822 cut-off events. [2024-06-03 20:13:26,885 INFO L125 PetriNetUnfolderBase]: For 521308/521308 co-relation queries the response was YES. [2024-06-03 20:13:26,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72039 conditions, 6822 events. 4637/6822 cut-off events. For 521308/521308 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 36701 event pairs, 1302 based on Foata normal form. 2/6823 useless extension candidates. Maximal degree in co-relation 71894. Up to 6694 conditions per place. [2024-06-03 20:13:26,967 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 609 selfloop transitions, 27 changer transitions 0/639 dead transitions. [2024-06-03 20:13:26,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 639 transitions, 15005 flow [2024-06-03 20:13:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:13:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:13:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-03 20:13:26,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-03 20:13:26,969 INFO L175 Difference]: Start difference. First operand has 306 places, 617 transitions, 13469 flow. Second operand 7 states and 109 transitions. [2024-06-03 20:13:26,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 639 transitions, 15005 flow [2024-06-03 20:13:28,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 639 transitions, 14744 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-03 20:13:28,338 INFO L231 Difference]: Finished difference. Result has 309 places, 621 transitions, 13359 flow [2024-06-03 20:13:28,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13208, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13359, PETRI_PLACES=309, PETRI_TRANSITIONS=621} [2024-06-03 20:13:28,339 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-03 20:13:28,339 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 621 transitions, 13359 flow [2024-06-03 20:13:28,339 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) [2024-06-03 20:13:28,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:28,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:28,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:13:28,339 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)] === [2024-06-03 20:13:28,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash 873000471, now seen corresponding path program 2 times [2024-06-03 20:13:28,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:28,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388441142] [2024-06-03 20:13:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:28,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:29,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:29,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388441142] [2024-06-03 20:13:29,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388441142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:29,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:29,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:29,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352506528] [2024-06-03 20:13:29,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:29,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:29,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:29,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:29,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:29,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:13:29,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 621 transitions, 13359 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) [2024-06-03 20:13:29,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:29,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:13:29,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:30,945 INFO L124 PetriNetUnfolderBase]: 4645/6834 cut-off events. [2024-06-03 20:13:30,945 INFO L125 PetriNetUnfolderBase]: For 532003/532003 co-relation queries the response was YES. [2024-06-03 20:13:31,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71413 conditions, 6834 events. 4645/6834 cut-off events. For 532003/532003 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 36886 event pairs, 1339 based on Foata normal form. 2/6835 useless extension candidates. Maximal degree in co-relation 71267. Up to 6737 conditions per place. [2024-06-03 20:13:31,203 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 608 selfloop transitions, 25 changer transitions 0/636 dead transitions. [2024-06-03 20:13:31,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 636 transitions, 14721 flow [2024-06-03 20:13:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:13:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:13:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-03 20:13:31,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 20:13:31,204 INFO L175 Difference]: Start difference. First operand has 309 places, 621 transitions, 13359 flow. Second operand 7 states and 105 transitions. [2024-06-03 20:13:31,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 636 transitions, 14721 flow [2024-06-03 20:13:32,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 636 transitions, 14605 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-03 20:13:32,542 INFO L231 Difference]: Finished difference. Result has 313 places, 623 transitions, 13350 flow [2024-06-03 20:13:32,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13269, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13350, PETRI_PLACES=313, PETRI_TRANSITIONS=623} [2024-06-03 20:13:32,543 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-03 20:13:32,543 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 623 transitions, 13350 flow [2024-06-03 20:13:32,543 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) [2024-06-03 20:13:32,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:32,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:32,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:13:32,543 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)] === [2024-06-03 20:13:32,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:32,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1951317953, now seen corresponding path program 3 times [2024-06-03 20:13:32,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:32,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361868776] [2024-06-03 20:13:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:32,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:33,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:33,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361868776] [2024-06-03 20:13:33,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361868776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:33,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:33,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:33,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915095017] [2024-06-03 20:13:33,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:33,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:33,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:33,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:33,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:13:33,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 623 transitions, 13350 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) [2024-06-03 20:13:33,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:33,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:13:33,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:35,200 INFO L124 PetriNetUnfolderBase]: 4640/6827 cut-off events. [2024-06-03 20:13:35,200 INFO L125 PetriNetUnfolderBase]: For 542227/542227 co-relation queries the response was YES. [2024-06-03 20:13:35,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71399 conditions, 6827 events. 4640/6827 cut-off events. For 542227/542227 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 36753 event pairs, 1301 based on Foata normal form. 2/6828 useless extension candidates. Maximal degree in co-relation 71251. Up to 6720 conditions per place. [2024-06-03 20:13:35,300 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 613 selfloop transitions, 22 changer transitions 0/638 dead transitions. [2024-06-03 20:13:35,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 638 transitions, 14682 flow [2024-06-03 20:13:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:13:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:13:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-03 20:13:35,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-03 20:13:35,301 INFO L175 Difference]: Start difference. First operand has 313 places, 623 transitions, 13350 flow. Second operand 6 states and 97 transitions. [2024-06-03 20:13:35,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 638 transitions, 14682 flow [2024-06-03 20:13:37,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 638 transitions, 14609 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:13:37,077 INFO L231 Difference]: Finished difference. Result has 314 places, 623 transitions, 13329 flow [2024-06-03 20:13:37,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13277, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13329, PETRI_PLACES=314, PETRI_TRANSITIONS=623} [2024-06-03 20:13:37,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-03 20:13:37,078 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 623 transitions, 13329 flow [2024-06-03 20:13:37,078 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) [2024-06-03 20:13:37,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:37,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:37,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:13:37,078 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)] === [2024-06-03 20:13:37,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:37,079 INFO L85 PathProgramCache]: Analyzing trace with hash -2039687003, now seen corresponding path program 1 times [2024-06-03 20:13:37,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:37,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991512399] [2024-06-03 20:13:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:37,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:37,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:37,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991512399] [2024-06-03 20:13:37,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991512399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:37,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:37,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:37,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047028608] [2024-06-03 20:13:37,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:37,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:37,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:37,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-03 20:13:37,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 623 transitions, 13329 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:37,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:37,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-03 20:13:37,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:39,963 INFO L124 PetriNetUnfolderBase]: 5211/7850 cut-off events. [2024-06-03 20:13:39,964 INFO L125 PetriNetUnfolderBase]: For 825770/825857 co-relation queries the response was YES. [2024-06-03 20:13:40,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81618 conditions, 7850 events. 5211/7850 cut-off events. For 825770/825857 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 45189 event pairs, 949 based on Foata normal form. 91/7861 useless extension candidates. Maximal degree in co-relation 81469. Up to 2381 conditions per place. [2024-06-03 20:13:40,101 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 250 selfloop transitions, 355 changer transitions 16/694 dead transitions. [2024-06-03 20:13:40,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 694 transitions, 15448 flow [2024-06-03 20:13:40,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-03 20:13:40,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-03 20:13:40,134 INFO L175 Difference]: Start difference. First operand has 314 places, 623 transitions, 13329 flow. Second operand 9 states and 185 transitions. [2024-06-03 20:13:40,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 694 transitions, 15448 flow [2024-06-03 20:13:42,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 694 transitions, 15397 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:13:42,670 INFO L231 Difference]: Finished difference. Result has 320 places, 628 transitions, 14237 flow [2024-06-03 20:13:42,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13278, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14237, PETRI_PLACES=320, PETRI_TRANSITIONS=628} [2024-06-03 20:13:42,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-03 20:13:42,671 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 628 transitions, 14237 flow [2024-06-03 20:13:42,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:42,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:42,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:42,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:13:42,676 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)] === [2024-06-03 20:13:42,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:42,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1475522183, now seen corresponding path program 2 times [2024-06-03 20:13:42,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:42,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760783736] [2024-06-03 20:13:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:42,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:43,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:43,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760783736] [2024-06-03 20:13:43,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760783736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:43,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:43,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:43,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658057891] [2024-06-03 20:13:43,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:43,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:43,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:43,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:43,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:43,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-03 20:13:43,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 628 transitions, 14237 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:43,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:43,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-03 20:13:43,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:45,993 INFO L124 PetriNetUnfolderBase]: 5952/9046 cut-off events. [2024-06-03 20:13:45,993 INFO L125 PetriNetUnfolderBase]: For 1022379/1022456 co-relation queries the response was YES. [2024-06-03 20:13:46,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95524 conditions, 9046 events. 5952/9046 cut-off events. For 1022379/1022456 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 53971 event pairs, 1355 based on Foata normal form. 91/9035 useless extension candidates. Maximal degree in co-relation 95372. Up to 4553 conditions per place. [2024-06-03 20:13:46,151 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 260 selfloop transitions, 353 changer transitions 19/705 dead transitions. [2024-06-03 20:13:46,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 705 transitions, 16593 flow [2024-06-03 20:13:46,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-03 20:13:46,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-03 20:13:46,153 INFO L175 Difference]: Start difference. First operand has 320 places, 628 transitions, 14237 flow. Second operand 9 states and 186 transitions. [2024-06-03 20:13:46,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 705 transitions, 16593 flow [2024-06-03 20:13:49,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 705 transitions, 16090 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:13:49,417 INFO L231 Difference]: Finished difference. Result has 325 places, 626 transitions, 14298 flow [2024-06-03 20:13:49,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13746, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14298, PETRI_PLACES=325, PETRI_TRANSITIONS=626} [2024-06-03 20:13:49,418 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-03 20:13:49,418 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 626 transitions, 14298 flow [2024-06-03 20:13:49,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:49,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:49,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:49,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:13:49,419 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)] === [2024-06-03 20:13:49,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2052191429, now seen corresponding path program 3 times [2024-06-03 20:13:49,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:49,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731489718] [2024-06-03 20:13:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:49,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:50,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:50,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731489718] [2024-06-03 20:13:50,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731489718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:50,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:50,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:50,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820519399] [2024-06-03 20:13:50,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:50,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:50,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:50,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-03 20:13:50,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 626 transitions, 14298 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:50,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:50,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-03 20:13:50,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:52,431 INFO L124 PetriNetUnfolderBase]: 5602/8536 cut-off events. [2024-06-03 20:13:52,431 INFO L125 PetriNetUnfolderBase]: For 922398/922470 co-relation queries the response was YES. [2024-06-03 20:13:52,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89645 conditions, 8536 events. 5602/8536 cut-off events. For 922398/922470 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 50560 event pairs, 1303 based on Foata normal form. 95/8569 useless extension candidates. Maximal degree in co-relation 89491. Up to 4873 conditions per place. [2024-06-03 20:13:52,573 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 239 selfloop transitions, 336 changer transitions 30/678 dead transitions. [2024-06-03 20:13:52,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 678 transitions, 16193 flow [2024-06-03 20:13:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 20:13:52,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-03 20:13:52,574 INFO L175 Difference]: Start difference. First operand has 325 places, 626 transitions, 14298 flow. Second operand 9 states and 174 transitions. [2024-06-03 20:13:52,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 678 transitions, 16193 flow [2024-06-03 20:13:55,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 678 transitions, 15696 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:13:55,241 INFO L231 Difference]: Finished difference. Result has 329 places, 607 transitions, 14050 flow [2024-06-03 20:13:55,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13801, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14050, PETRI_PLACES=329, PETRI_TRANSITIONS=607} [2024-06-03 20:13:55,242 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-03 20:13:55,242 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 607 transitions, 14050 flow [2024-06-03 20:13:55,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:55,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:55,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:55,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:13:55,243 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)] === [2024-06-03 20:13:55,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:55,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1744443353, now seen corresponding path program 1 times [2024-06-03 20:13:55,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:55,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113457314] [2024-06-03 20:13:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:55,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:55,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:55,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113457314] [2024-06-03 20:13:55,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113457314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:55,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:55,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:55,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21179140] [2024-06-03 20:13:55,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:55,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:55,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:55,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:55,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:55,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:13:55,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 607 transitions, 14050 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) [2024-06-03 20:13:55,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:55,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:13:55,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:58,303 INFO L124 PetriNetUnfolderBase]: 5784/8710 cut-off events. [2024-06-03 20:13:58,304 INFO L125 PetriNetUnfolderBase]: For 774544/774550 co-relation queries the response was YES. [2024-06-03 20:13:58,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91604 conditions, 8710 events. 5784/8710 cut-off events. For 774544/774550 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 50519 event pairs, 1847 based on Foata normal form. 8/8717 useless extension candidates. Maximal degree in co-relation 91448. Up to 8328 conditions per place. [2024-06-03 20:13:58,434 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 536 selfloop transitions, 107 changer transitions 2/648 dead transitions. [2024-06-03 20:13:58,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 648 transitions, 16048 flow [2024-06-03 20:13:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:58,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 20:13:58,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-03 20:13:58,435 INFO L175 Difference]: Start difference. First operand has 329 places, 607 transitions, 14050 flow. Second operand 9 states and 148 transitions. [2024-06-03 20:13:58,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 648 transitions, 16048 flow [2024-06-03 20:14:01,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 648 transitions, 15588 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:01,209 INFO L231 Difference]: Finished difference. Result has 333 places, 613 transitions, 14021 flow [2024-06-03 20:14:01,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13592, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14021, PETRI_PLACES=333, PETRI_TRANSITIONS=613} [2024-06-03 20:14:01,209 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-03 20:14:01,210 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 613 transitions, 14021 flow [2024-06-03 20:14:01,210 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) [2024-06-03 20:14:01,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:01,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:01,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:14:01,210 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)] === [2024-06-03 20:14:01,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:01,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1526260427, now seen corresponding path program 2 times [2024-06-03 20:14:01,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:01,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305910496] [2024-06-03 20:14:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:01,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:01,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:01,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305910496] [2024-06-03 20:14:01,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305910496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:01,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:01,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:01,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401029834] [2024-06-03 20:14:01,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:01,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:01,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:01,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:01,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:01,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:14:01,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 613 transitions, 14021 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) [2024-06-03 20:14:01,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:01,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:14:01,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:04,467 INFO L124 PetriNetUnfolderBase]: 5788/8719 cut-off events. [2024-06-03 20:14:04,468 INFO L125 PetriNetUnfolderBase]: For 781577/781583 co-relation queries the response was YES. [2024-06-03 20:14:04,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90919 conditions, 8719 events. 5788/8719 cut-off events. For 781577/781583 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 50589 event pairs, 1900 based on Foata normal form. 8/8726 useless extension candidates. Maximal degree in co-relation 90761. Up to 8221 conditions per place. [2024-06-03 20:14:04,601 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 515 selfloop transitions, 132 changer transitions 4/654 dead transitions. [2024-06-03 20:14:04,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 654 transitions, 16010 flow [2024-06-03 20:14:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:04,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 20:14:04,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-03 20:14:04,603 INFO L175 Difference]: Start difference. First operand has 333 places, 613 transitions, 14021 flow. Second operand 9 states and 151 transitions. [2024-06-03 20:14:04,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 654 transitions, 16010 flow [2024-06-03 20:14:07,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 654 transitions, 15754 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:07,365 INFO L231 Difference]: Finished difference. Result has 336 places, 618 transitions, 14189 flow [2024-06-03 20:14:07,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13815, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14189, PETRI_PLACES=336, PETRI_TRANSITIONS=618} [2024-06-03 20:14:07,366 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-03 20:14:07,366 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 618 transitions, 14189 flow [2024-06-03 20:14:07,366 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) [2024-06-03 20:14:07,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:07,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:07,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:14:07,367 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)] === [2024-06-03 20:14:07,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:07,367 INFO L85 PathProgramCache]: Analyzing trace with hash 345476380, now seen corresponding path program 1 times [2024-06-03 20:14:07,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:07,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034923957] [2024-06-03 20:14:07,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:07,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:07,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:07,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034923957] [2024-06-03 20:14:07,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034923957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:07,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:07,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:07,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407172200] [2024-06-03 20:14:07,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:07,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:07,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:07,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:07,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:08,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:14:08,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 618 transitions, 14189 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) [2024-06-03 20:14:08,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:08,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:14:08,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:10,734 INFO L124 PetriNetUnfolderBase]: 5998/9006 cut-off events. [2024-06-03 20:14:10,734 INFO L125 PetriNetUnfolderBase]: For 865347/865378 co-relation queries the response was YES. [2024-06-03 20:14:10,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95060 conditions, 9006 events. 5998/9006 cut-off events. For 865347/865378 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 52010 event pairs, 1574 based on Foata normal form. 40/9045 useless extension candidates. Maximal degree in co-relation 94901. Up to 5738 conditions per place. [2024-06-03 20:14:10,858 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 402 selfloop transitions, 292 changer transitions 0/697 dead transitions. [2024-06-03 20:14:10,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 697 transitions, 17109 flow [2024-06-03 20:14:10,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 20:14:10,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-03 20:14:10,860 INFO L175 Difference]: Start difference. First operand has 336 places, 618 transitions, 14189 flow. Second operand 9 states and 171 transitions. [2024-06-03 20:14:10,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 697 transitions, 17109 flow [2024-06-03 20:14:14,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 697 transitions, 16779 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 20:14:14,360 INFO L231 Difference]: Finished difference. Result has 339 places, 637 transitions, 14952 flow [2024-06-03 20:14:14,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13859, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14952, PETRI_PLACES=339, PETRI_TRANSITIONS=637} [2024-06-03 20:14:14,362 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 298 predicate places. [2024-06-03 20:14:14,362 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 637 transitions, 14952 flow [2024-06-03 20:14:14,362 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) [2024-06-03 20:14:14,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:14,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:14,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:14:14,362 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)] === [2024-06-03 20:14:14,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:14,363 INFO L85 PathProgramCache]: Analyzing trace with hash 776269545, now seen corresponding path program 3 times [2024-06-03 20:14:14,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:14,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639068742] [2024-06-03 20:14:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:14,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:15,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:15,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639068742] [2024-06-03 20:14:15,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639068742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:15,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:15,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:15,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302738169] [2024-06-03 20:14:15,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:15,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:15,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:15,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:15,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:15,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:14:15,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 637 transitions, 14952 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) [2024-06-03 20:14:15,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:15,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:14:15,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:17,688 INFO L124 PetriNetUnfolderBase]: 6008/9022 cut-off events. [2024-06-03 20:14:17,689 INFO L125 PetriNetUnfolderBase]: For 880722/880744 co-relation queries the response was YES. [2024-06-03 20:14:17,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97465 conditions, 9022 events. 6008/9022 cut-off events. For 880722/880744 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 52330 event pairs, 1959 based on Foata normal form. 24/9045 useless extension candidates. Maximal degree in co-relation 97304. Up to 8523 conditions per place. [2024-06-03 20:14:17,824 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 541 selfloop transitions, 130 changer transitions 2/676 dead transitions. [2024-06-03 20:14:17,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 676 transitions, 16961 flow [2024-06-03 20:14:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:14:17,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:14:17,826 INFO L175 Difference]: Start difference. First operand has 339 places, 637 transitions, 14952 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:14:17,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 676 transitions, 16961 flow [2024-06-03 20:14:21,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 676 transitions, 16447 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-03 20:14:21,376 INFO L231 Difference]: Finished difference. Result has 344 places, 642 transitions, 14837 flow [2024-06-03 20:14:21,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14439, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14837, PETRI_PLACES=344, PETRI_TRANSITIONS=642} [2024-06-03 20:14:21,379 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-03 20:14:21,380 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 642 transitions, 14837 flow [2024-06-03 20:14:21,380 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) [2024-06-03 20:14:21,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:21,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:21,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:14:21,380 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)] === [2024-06-03 20:14:21,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:21,381 INFO L85 PathProgramCache]: Analyzing trace with hash 912985466, now seen corresponding path program 2 times [2024-06-03 20:14:21,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:21,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399614637] [2024-06-03 20:14:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:21,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:22,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:22,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399614637] [2024-06-03 20:14:22,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399614637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:22,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:22,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:22,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953098718] [2024-06-03 20:14:22,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:22,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:22,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:22,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:22,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:22,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:14:22,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 642 transitions, 14837 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) [2024-06-03 20:14:22,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:22,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:14:22,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:24,736 INFO L124 PetriNetUnfolderBase]: 6068/9108 cut-off events. [2024-06-03 20:14:24,736 INFO L125 PetriNetUnfolderBase]: For 914589/914593 co-relation queries the response was YES. [2024-06-03 20:14:24,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97032 conditions, 9108 events. 6068/9108 cut-off events. For 914589/914593 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 52805 event pairs, 1996 based on Foata normal form. 16/9123 useless extension candidates. Maximal degree in co-relation 96870. Up to 8622 conditions per place. [2024-06-03 20:14:24,863 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 590 selfloop transitions, 88 changer transitions 0/681 dead transitions. [2024-06-03 20:14:24,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 681 transitions, 16797 flow [2024-06-03 20:14:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:14:24,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:14:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-03 20:14:24,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 20:14:24,864 INFO L175 Difference]: Start difference. First operand has 344 places, 642 transitions, 14837 flow. Second operand 11 states and 176 transitions. [2024-06-03 20:14:24,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 681 transitions, 16797 flow [2024-06-03 20:14:28,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 681 transitions, 16495 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:28,919 INFO L231 Difference]: Finished difference. Result has 348 places, 649 transitions, 14912 flow [2024-06-03 20:14:28,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14535, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14912, PETRI_PLACES=348, PETRI_TRANSITIONS=649} [2024-06-03 20:14:28,929 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-03 20:14:28,929 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 649 transitions, 14912 flow [2024-06-03 20:14:28,930 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) [2024-06-03 20:14:28,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:28,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:28,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:14:28,930 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)] === [2024-06-03 20:14:28,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:28,930 INFO L85 PathProgramCache]: Analyzing trace with hash -278564014, now seen corresponding path program 3 times [2024-06-03 20:14:28,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:28,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583409284] [2024-06-03 20:14:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:28,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:29,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:29,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583409284] [2024-06-03 20:14:29,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583409284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:29,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:29,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:29,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771596772] [2024-06-03 20:14:29,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:29,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:29,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:29,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:29,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:29,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:14:29,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 649 transitions, 14912 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) [2024-06-03 20:14:29,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:29,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:14:29,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:32,217 INFO L124 PetriNetUnfolderBase]: 6024/9048 cut-off events. [2024-06-03 20:14:32,218 INFO L125 PetriNetUnfolderBase]: For 914728/914732 co-relation queries the response was YES. [2024-06-03 20:14:32,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95933 conditions, 9048 events. 6024/9048 cut-off events. For 914728/914732 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 52456 event pairs, 2016 based on Foata normal form. 16/9063 useless extension candidates. Maximal degree in co-relation 95770. Up to 8602 conditions per place. [2024-06-03 20:14:32,345 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 589 selfloop transitions, 87 changer transitions 0/679 dead transitions. [2024-06-03 20:14:32,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 679 transitions, 16552 flow [2024-06-03 20:14:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:14:32,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:14:32,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-03 20:14:32,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-03 20:14:32,346 INFO L175 Difference]: Start difference. First operand has 348 places, 649 transitions, 14912 flow. Second operand 10 states and 164 transitions. [2024-06-03 20:14:32,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 679 transitions, 16552 flow [2024-06-03 20:14:35,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 679 transitions, 16353 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-03 20:14:35,696 INFO L231 Difference]: Finished difference. Result has 350 places, 649 transitions, 14899 flow [2024-06-03 20:14:35,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14713, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14899, PETRI_PLACES=350, PETRI_TRANSITIONS=649} [2024-06-03 20:14:35,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-03 20:14:35,697 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 649 transitions, 14899 flow [2024-06-03 20:14:35,697 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) [2024-06-03 20:14:35,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:35,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:35,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:14:35,697 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)] === [2024-06-03 20:14:35,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:35,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2037381573, now seen corresponding path program 4 times [2024-06-03 20:14:35,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:35,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27661711] [2024-06-03 20:14:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:35,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:36,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:36,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27661711] [2024-06-03 20:14:36,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27661711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:36,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:36,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:14:36,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732979518] [2024-06-03 20:14:36,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:36,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:14:36,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:36,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:14:36,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:14:37,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:14:37,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 649 transitions, 14899 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) [2024-06-03 20:14:37,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:37,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:14:37,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:39,812 INFO L124 PetriNetUnfolderBase]: 6490/9798 cut-off events. [2024-06-03 20:14:39,813 INFO L125 PetriNetUnfolderBase]: For 992302/992308 co-relation queries the response was YES. [2024-06-03 20:14:39,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102451 conditions, 9798 events. 6490/9798 cut-off events. For 992302/992308 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 58436 event pairs, 1937 based on Foata normal form. 20/9817 useless extension candidates. Maximal degree in co-relation 102287. Up to 8486 conditions per place. [2024-06-03 20:14:39,971 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 540 selfloop transitions, 173 changer transitions 3/719 dead transitions. [2024-06-03 20:14:39,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 719 transitions, 17603 flow [2024-06-03 20:14:39,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:14:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:14:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-03 20:14:39,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-03 20:14:39,980 INFO L175 Difference]: Start difference. First operand has 350 places, 649 transitions, 14899 flow. Second operand 10 states and 183 transitions. [2024-06-03 20:14:39,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 719 transitions, 17603 flow [2024-06-03 20:14:43,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 719 transitions, 17381 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-03 20:14:43,575 INFO L231 Difference]: Finished difference. Result has 351 places, 663 transitions, 15390 flow [2024-06-03 20:14:43,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14677, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15390, PETRI_PLACES=351, PETRI_TRANSITIONS=663} [2024-06-03 20:14:43,576 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-03 20:14:43,576 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 663 transitions, 15390 flow [2024-06-03 20:14:43,577 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) [2024-06-03 20:14:43,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:43,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:43,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:14:43,577 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)] === [2024-06-03 20:14:43,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:43,577 INFO L85 PathProgramCache]: Analyzing trace with hash 2037590823, now seen corresponding path program 5 times [2024-06-03 20:14:43,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:43,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711973099] [2024-06-03 20:14:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:43,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:44,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:44,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711973099] [2024-06-03 20:14:44,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711973099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:44,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:44,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:14:44,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402430512] [2024-06-03 20:14:44,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:44,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:14:44,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:44,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:14:44,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:14:45,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:14:45,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 663 transitions, 15390 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) [2024-06-03 20:14:45,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:45,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:14:45,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:47,882 INFO L124 PetriNetUnfolderBase]: 6542/9882 cut-off events. [2024-06-03 20:14:47,882 INFO L125 PetriNetUnfolderBase]: For 1026514/1026520 co-relation queries the response was YES. [2024-06-03 20:14:48,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104690 conditions, 9882 events. 6542/9882 cut-off events. For 1026514/1026520 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 59037 event pairs, 2111 based on Foata normal form. 20/9901 useless extension candidates. Maximal degree in co-relation 104524. Up to 9124 conditions per place. [2024-06-03 20:14:48,047 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 540 selfloop transitions, 166 changer transitions 4/713 dead transitions. [2024-06-03 20:14:48,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 713 transitions, 17658 flow [2024-06-03 20:14:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:14:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:14:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-03 20:14:48,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-03 20:14:48,048 INFO L175 Difference]: Start difference. First operand has 351 places, 663 transitions, 15390 flow. Second operand 11 states and 187 transitions. [2024-06-03 20:14:48,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 713 transitions, 17658 flow [2024-06-03 20:14:51,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 713 transitions, 17358 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:51,875 INFO L231 Difference]: Finished difference. Result has 356 places, 665 transitions, 15503 flow [2024-06-03 20:14:51,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15110, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15503, PETRI_PLACES=356, PETRI_TRANSITIONS=665} [2024-06-03 20:14:51,889 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-03 20:14:51,889 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 665 transitions, 15503 flow [2024-06-03 20:14:51,889 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) [2024-06-03 20:14:51,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:51,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:51,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:14:51,889 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)] === [2024-06-03 20:14:51,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:51,890 INFO L85 PathProgramCache]: Analyzing trace with hash 912993402, now seen corresponding path program 1 times [2024-06-03 20:14:51,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:51,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628842034] [2024-06-03 20:14:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:51,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:53,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:53,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628842034] [2024-06-03 20:14:53,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628842034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:53,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:53,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25287284] [2024-06-03 20:14:53,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:53,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:53,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:53,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:53,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:14:53,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 665 transitions, 15503 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:53,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:53,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:14:53,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:56,381 INFO L124 PetriNetUnfolderBase]: 6550/9884 cut-off events. [2024-06-03 20:14:56,382 INFO L125 PetriNetUnfolderBase]: For 1005177/1005181 co-relation queries the response was YES. [2024-06-03 20:14:56,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104034 conditions, 9884 events. 6550/9884 cut-off events. For 1005177/1005181 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 58946 event pairs, 2198 based on Foata normal form. 6/9889 useless extension candidates. Maximal degree in co-relation 103866. Up to 9735 conditions per place. [2024-06-03 20:14:56,516 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 636 selfloop transitions, 49 changer transitions 0/688 dead transitions. [2024-06-03 20:14:56,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 688 transitions, 16995 flow [2024-06-03 20:14:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-03 20:14:56,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2024-06-03 20:14:56,517 INFO L175 Difference]: Start difference. First operand has 356 places, 665 transitions, 15503 flow. Second operand 9 states and 137 transitions. [2024-06-03 20:14:56,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 688 transitions, 16995 flow [2024-06-03 20:14:59,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 688 transitions, 16689 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:59,636 INFO L231 Difference]: Finished difference. Result has 358 places, 667 transitions, 15346 flow [2024-06-03 20:14:59,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15197, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15346, PETRI_PLACES=358, PETRI_TRANSITIONS=667} [2024-06-03 20:14:59,637 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 317 predicate places. [2024-06-03 20:14:59,637 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 667 transitions, 15346 flow [2024-06-03 20:14:59,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:59,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:59,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:59,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:14:59,641 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)] === [2024-06-03 20:14:59,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:59,642 INFO L85 PathProgramCache]: Analyzing trace with hash -278687301, now seen corresponding path program 6 times [2024-06-03 20:14:59,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:59,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672402009] [2024-06-03 20:14:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:59,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:00,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:00,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672402009] [2024-06-03 20:15:00,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672402009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:00,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:00,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:00,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835349229] [2024-06-03 20:15:00,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:00,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:00,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:00,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:00,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:00,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:15:00,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 667 transitions, 15346 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) [2024-06-03 20:15:00,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:00,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:15:00,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:03,929 INFO L124 PetriNetUnfolderBase]: 6589/9945 cut-off events. [2024-06-03 20:15:03,929 INFO L125 PetriNetUnfolderBase]: For 1055162/1055166 co-relation queries the response was YES. [2024-06-03 20:15:04,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104081 conditions, 9945 events. 6589/9945 cut-off events. For 1055162/1055166 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 59372 event pairs, 2270 based on Foata normal form. 18/9962 useless extension candidates. Maximal degree in co-relation 103912. Up to 9743 conditions per place. [2024-06-03 20:15:04,070 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 652 selfloop transitions, 43 changer transitions 0/698 dead transitions. [2024-06-03 20:15:04,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 698 transitions, 16919 flow [2024-06-03 20:15:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:15:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:15:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 165 transitions. [2024-06-03 20:15:04,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 20:15:04,071 INFO L175 Difference]: Start difference. First operand has 358 places, 667 transitions, 15346 flow. Second operand 11 states and 165 transitions. [2024-06-03 20:15:04,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 698 transitions, 16919 flow [2024-06-03 20:15:07,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 698 transitions, 16786 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:07,694 INFO L231 Difference]: Finished difference. Result has 362 places, 668 transitions, 15327 flow [2024-06-03 20:15:07,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15213, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15327, PETRI_PLACES=362, PETRI_TRANSITIONS=668} [2024-06-03 20:15:07,695 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-03 20:15:07,695 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 668 transitions, 15327 flow [2024-06-03 20:15:07,695 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) [2024-06-03 20:15:07,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:07,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:07,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:15:07,696 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)] === [2024-06-03 20:15:07,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2038090361, now seen corresponding path program 7 times [2024-06-03 20:15:07,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:07,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950132565] [2024-06-03 20:15:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:07,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:08,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:08,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950132565] [2024-06-03 20:15:08,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950132565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:08,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:08,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:08,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764772915] [2024-06-03 20:15:08,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:08,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:08,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:08,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:08,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:15:08,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 668 transitions, 15327 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:08,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:08,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:15:08,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:12,274 INFO L124 PetriNetUnfolderBase]: 7442/11339 cut-off events. [2024-06-03 20:15:12,274 INFO L125 PetriNetUnfolderBase]: For 1256372/1256396 co-relation queries the response was YES. [2024-06-03 20:15:12,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116196 conditions, 11339 events. 7442/11339 cut-off events. For 1256372/1256396 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 70170 event pairs, 1618 based on Foata normal form. 32/11370 useless extension candidates. Maximal degree in co-relation 116026. Up to 6510 conditions per place. [2024-06-03 20:15:12,431 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 345 selfloop transitions, 393 changer transitions 5/746 dead transitions. [2024-06-03 20:15:12,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 746 transitions, 18227 flow [2024-06-03 20:15:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:12,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 20:15:12,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-06-03 20:15:12,433 INFO L175 Difference]: Start difference. First operand has 362 places, 668 transitions, 15327 flow. Second operand 9 states and 178 transitions. [2024-06-03 20:15:12,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 746 transitions, 18227 flow [2024-06-03 20:15:16,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 746 transitions, 18128 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:16,764 INFO L231 Difference]: Finished difference. Result has 365 places, 683 transitions, 16485 flow [2024-06-03 20:15:16,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15237, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16485, PETRI_PLACES=365, PETRI_TRANSITIONS=683} [2024-06-03 20:15:16,765 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-03 20:15:16,765 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 683 transitions, 16485 flow [2024-06-03 20:15:16,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:16,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:16,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:16,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:15:16,766 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)] === [2024-06-03 20:15:16,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1495192481, now seen corresponding path program 8 times [2024-06-03 20:15:16,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:16,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924428657] [2024-06-03 20:15:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:16,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:17,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:17,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924428657] [2024-06-03 20:15:17,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924428657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:17,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:17,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:17,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341670286] [2024-06-03 20:15:17,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:17,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:17,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:17,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:17,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:17,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:15:17,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 683 transitions, 16485 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:17,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:17,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:15:17,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:21,220 INFO L124 PetriNetUnfolderBase]: 7538/11484 cut-off events. [2024-06-03 20:15:21,220 INFO L125 PetriNetUnfolderBase]: For 1310053/1310081 co-relation queries the response was YES. [2024-06-03 20:15:21,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121334 conditions, 11484 events. 7538/11484 cut-off events. For 1310053/1310081 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 71484 event pairs, 2104 based on Foata normal form. 36/11519 useless extension candidates. Maximal degree in co-relation 121162. Up to 8879 conditions per place. [2024-06-03 20:15:21,381 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 360 selfloop transitions, 373 changer transitions 2/738 dead transitions. [2024-06-03 20:15:21,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 738 transitions, 18932 flow [2024-06-03 20:15:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 20:15:21,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-03 20:15:21,383 INFO L175 Difference]: Start difference. First operand has 365 places, 683 transitions, 16485 flow. Second operand 9 states and 168 transitions. [2024-06-03 20:15:21,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 738 transitions, 18932 flow [2024-06-03 20:15:26,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 738 transitions, 18280 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:26,308 INFO L231 Difference]: Finished difference. Result has 369 places, 689 transitions, 16766 flow [2024-06-03 20:15:26,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15863, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16766, PETRI_PLACES=369, PETRI_TRANSITIONS=689} [2024-06-03 20:15:26,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-03 20:15:26,309 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 689 transitions, 16766 flow [2024-06-03 20:15:26,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:26,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:26,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:26,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:15:26,310 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)] === [2024-06-03 20:15:26,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:26,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1502604767, now seen corresponding path program 4 times [2024-06-03 20:15:26,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:26,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678343350] [2024-06-03 20:15:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:26,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:27,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:27,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678343350] [2024-06-03 20:15:27,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678343350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:27,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:27,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:15:27,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847861221] [2024-06-03 20:15:27,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:27,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:15:27,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:27,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:15:27,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:15:27,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:15:27,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 689 transitions, 16766 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:27,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:27,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:15:27,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:30,565 INFO L124 PetriNetUnfolderBase]: 7532/11479 cut-off events. [2024-06-03 20:15:30,565 INFO L125 PetriNetUnfolderBase]: For 1292123/1292129 co-relation queries the response was YES. [2024-06-03 20:15:30,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120813 conditions, 11479 events. 7532/11479 cut-off events. For 1292123/1292129 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 71380 event pairs, 2578 based on Foata normal form. 8/11486 useless extension candidates. Maximal degree in co-relation 120639. Up to 10825 conditions per place. [2024-06-03 20:15:30,736 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 504 selfloop transitions, 207 changer transitions 3/717 dead transitions. [2024-06-03 20:15:30,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 717 transitions, 18497 flow [2024-06-03 20:15:30,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:15:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:15:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 20:15:30,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-03 20:15:30,738 INFO L175 Difference]: Start difference. First operand has 369 places, 689 transitions, 16766 flow. Second operand 8 states and 134 transitions. [2024-06-03 20:15:30,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 717 transitions, 18497 flow [2024-06-03 20:15:35,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 717 transitions, 17813 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 20:15:35,717 INFO L231 Difference]: Finished difference. Result has 371 places, 689 transitions, 16522 flow [2024-06-03 20:15:35,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16082, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16522, PETRI_PLACES=371, PETRI_TRANSITIONS=689} [2024-06-03 20:15:35,718 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-03 20:15:35,718 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 689 transitions, 16522 flow [2024-06-03 20:15:35,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:35,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:35,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:35,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:15:35,718 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)] === [2024-06-03 20:15:35,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:35,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2045708921, now seen corresponding path program 9 times [2024-06-03 20:15:35,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:35,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644162599] [2024-06-03 20:15:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:35,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:36,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:36,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644162599] [2024-06-03 20:15:36,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644162599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:36,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:36,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:36,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919730898] [2024-06-03 20:15:36,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:36,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:36,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:36,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:36,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:15:36,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 689 transitions, 16522 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:36,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:36,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:15:36,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:40,436 INFO L124 PetriNetUnfolderBase]: 7586/11561 cut-off events. [2024-06-03 20:15:40,436 INFO L125 PetriNetUnfolderBase]: For 1338805/1338811 co-relation queries the response was YES. [2024-06-03 20:15:40,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120422 conditions, 11561 events. 7586/11561 cut-off events. For 1338805/1338811 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 72016 event pairs, 2578 based on Foata normal form. 18/11578 useless extension candidates. Maximal degree in co-relation 120247. Up to 10684 conditions per place. [2024-06-03 20:15:40,611 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 500 selfloop transitions, 228 changer transitions 3/734 dead transitions. [2024-06-03 20:15:40,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 734 transitions, 18602 flow [2024-06-03 20:15:40,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:15:40,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:15:40,612 INFO L175 Difference]: Start difference. First operand has 371 places, 689 transitions, 16522 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:15:40,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 734 transitions, 18602 flow [2024-06-03 20:15:45,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 734 transitions, 18005 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-03 20:15:45,400 INFO L231 Difference]: Finished difference. Result has 371 places, 701 transitions, 16724 flow [2024-06-03 20:15:45,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15929, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16724, PETRI_PLACES=371, PETRI_TRANSITIONS=701} [2024-06-03 20:15:45,401 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-03 20:15:45,401 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 701 transitions, 16724 flow [2024-06-03 20:15:45,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:45,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:45,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:45,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:15:45,402 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)] === [2024-06-03 20:15:45,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:45,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2138456718, now seen corresponding path program 4 times [2024-06-03 20:15:45,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:45,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000123464] [2024-06-03 20:15:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:45,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:46,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:46,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000123464] [2024-06-03 20:15:46,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000123464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:46,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:46,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:15:46,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755314087] [2024-06-03 20:15:46,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:46,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:15:46,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:46,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:15:46,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:15:46,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:15:46,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 701 transitions, 16724 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:46,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:46,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:15:46,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:49,937 INFO L124 PetriNetUnfolderBase]: 7818/11879 cut-off events. [2024-06-03 20:15:49,937 INFO L125 PetriNetUnfolderBase]: For 1386548/1386604 co-relation queries the response was YES. [2024-06-03 20:15:50,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124673 conditions, 11879 events. 7818/11879 cut-off events. For 1386548/1386604 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 73972 event pairs, 1966 based on Foata normal form. 76/11954 useless extension candidates. Maximal degree in co-relation 124499. Up to 8387 conditions per place. [2024-06-03 20:15:50,142 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 390 selfloop transitions, 377 changer transitions 0/770 dead transitions. [2024-06-03 20:15:50,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 770 transitions, 19813 flow [2024-06-03 20:15:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:15:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:15:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 20:15:50,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-03 20:15:50,144 INFO L175 Difference]: Start difference. First operand has 371 places, 701 transitions, 16724 flow. Second operand 8 states and 148 transitions. [2024-06-03 20:15:50,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 770 transitions, 19813 flow [2024-06-03 20:15:55,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 770 transitions, 19352 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 20:15:55,796 INFO L231 Difference]: Finished difference. Result has 375 places, 729 transitions, 17995 flow [2024-06-03 20:15:55,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16263, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17995, PETRI_PLACES=375, PETRI_TRANSITIONS=729} [2024-06-03 20:15:55,797 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-03 20:15:55,797 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 729 transitions, 17995 flow [2024-06-03 20:15:55,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:55,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:55,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:55,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:15:55,798 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)] === [2024-06-03 20:15:55,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:55,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2138457059, now seen corresponding path program 5 times [2024-06-03 20:15:55,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:55,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315359075] [2024-06-03 20:15:55,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:55,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:56,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:56,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315359075] [2024-06-03 20:15:56,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315359075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:56,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:56,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:15:56,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855193127] [2024-06-03 20:15:56,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:56,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:15:56,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:56,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:15:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:15:56,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:15:56,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 729 transitions, 17995 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:56,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:56,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:15:56,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:00,452 INFO L124 PetriNetUnfolderBase]: 7843/11921 cut-off events. [2024-06-03 20:16:00,453 INFO L125 PetriNetUnfolderBase]: For 1383492/1383514 co-relation queries the response was YES. [2024-06-03 20:16:00,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127866 conditions, 11921 events. 7843/11921 cut-off events. For 1383492/1383514 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 74405 event pairs, 2608 based on Foata normal form. 27/11947 useless extension candidates. Maximal degree in co-relation 127689. Up to 11257 conditions per place. [2024-06-03 20:16:00,658 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 562 selfloop transitions, 202 changer transitions 2/769 dead transitions. [2024-06-03 20:16:00,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 769 transitions, 20173 flow [2024-06-03 20:16:00,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:16:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:16:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 20:16:00,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-03 20:16:00,660 INFO L175 Difference]: Start difference. First operand has 375 places, 729 transitions, 17995 flow. Second operand 8 states and 131 transitions. [2024-06-03 20:16:00,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 769 transitions, 20173 flow [2024-06-03 20:16:06,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 769 transitions, 19395 flow, removed 125 selfloop flow, removed 4 redundant places. [2024-06-03 20:16:06,858 INFO L231 Difference]: Finished difference. Result has 379 places, 740 transitions, 17951 flow [2024-06-03 20:16:06,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17222, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17951, PETRI_PLACES=379, PETRI_TRANSITIONS=740} [2024-06-03 20:16:06,859 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-03 20:16:06,859 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 740 transitions, 17951 flow [2024-06-03 20:16:06,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:06,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:06,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:06,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:16:06,860 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)] === [2024-06-03 20:16:06,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:06,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1274758268, now seen corresponding path program 5 times [2024-06-03 20:16:06,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:06,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547633442] [2024-06-03 20:16:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:06,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:07,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:07,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547633442] [2024-06-03 20:16:07,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547633442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:07,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:07,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:16:07,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390907564] [2024-06-03 20:16:07,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:07,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:16:07,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:07,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:16:07,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:16:07,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:16:07,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 740 transitions, 17951 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:07,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:07,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:16:07,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:11,273 INFO L124 PetriNetUnfolderBase]: 7911/12013 cut-off events. [2024-06-03 20:16:11,273 INFO L125 PetriNetUnfolderBase]: For 1387870/1387874 co-relation queries the response was YES. [2024-06-03 20:16:11,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126281 conditions, 12013 events. 7911/12013 cut-off events. For 1387870/1387874 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 74903 event pairs, 2776 based on Foata normal form. 16/12028 useless extension candidates. Maximal degree in co-relation 126103. Up to 11191 conditions per place. [2024-06-03 20:16:11,456 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 647 selfloop transitions, 127 changer transitions 0/777 dead transitions. [2024-06-03 20:16:11,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 777 transitions, 20115 flow [2024-06-03 20:16:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:16:11,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:16:11,458 INFO L175 Difference]: Start difference. First operand has 379 places, 740 transitions, 17951 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:16:11,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 777 transitions, 20115 flow [2024-06-03 20:16:17,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 777 transitions, 19721 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-03 20:16:17,806 INFO L231 Difference]: Finished difference. Result has 382 places, 747 transitions, 17988 flow [2024-06-03 20:16:17,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17561, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17988, PETRI_PLACES=382, PETRI_TRANSITIONS=747} [2024-06-03 20:16:17,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-03 20:16:17,807 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 747 transitions, 17988 flow [2024-06-03 20:16:17,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:17,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:17,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:17,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:16:17,807 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)] === [2024-06-03 20:16:17,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:17,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1990639728, now seen corresponding path program 6 times [2024-06-03 20:16:17,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:17,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492745368] [2024-06-03 20:16:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:17,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:18,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:18,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492745368] [2024-06-03 20:16:18,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492745368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:18,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:18,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:16:18,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311857782] [2024-06-03 20:16:18,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:18,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:16:18,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:18,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:16:18,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:16:18,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:16:18,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 747 transitions, 17988 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:18,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:18,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:16:18,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:22,424 INFO L124 PetriNetUnfolderBase]: 7867/11953 cut-off events. [2024-06-03 20:16:22,424 INFO L125 PetriNetUnfolderBase]: For 1355499/1355503 co-relation queries the response was YES. [2024-06-03 20:16:22,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124875 conditions, 11953 events. 7867/11953 cut-off events. For 1355499/1355503 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 74510 event pairs, 2744 based on Foata normal form. 16/11968 useless extension candidates. Maximal degree in co-relation 124697. Up to 11171 conditions per place. [2024-06-03 20:16:22,621 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 645 selfloop transitions, 129 changer transitions 0/777 dead transitions. [2024-06-03 20:16:22,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 777 transitions, 19857 flow [2024-06-03 20:16:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-03 20:16:22,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 20:16:22,622 INFO L175 Difference]: Start difference. First operand has 382 places, 747 transitions, 17988 flow. Second operand 10 states and 160 transitions. [2024-06-03 20:16:22,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 777 transitions, 19857 flow [2024-06-03 20:16:28,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 777 transitions, 19543 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-03 20:16:28,481 INFO L231 Difference]: Finished difference. Result has 384 places, 747 transitions, 17959 flow [2024-06-03 20:16:28,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17676, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17959, PETRI_PLACES=384, PETRI_TRANSITIONS=747} [2024-06-03 20:16:28,482 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-03 20:16:28,482 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 747 transitions, 17959 flow [2024-06-03 20:16:28,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:28,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:28,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:28,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:16:28,483 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)] === [2024-06-03 20:16:28,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:28,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1990643696, now seen corresponding path program 1 times [2024-06-03 20:16:28,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:28,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103923025] [2024-06-03 20:16:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:28,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:29,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:29,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103923025] [2024-06-03 20:16:29,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103923025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:29,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:29,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:16:29,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878028661] [2024-06-03 20:16:29,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:29,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:16:29,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:29,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:16:29,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:16:29,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-03 20:16:29,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 747 transitions, 17959 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:29,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:29,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-03 20:16:29,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:33,189 INFO L124 PetriNetUnfolderBase]: 7927/12037 cut-off events. [2024-06-03 20:16:33,190 INFO L125 PetriNetUnfolderBase]: For 1343018/1343022 co-relation queries the response was YES. [2024-06-03 20:16:33,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125769 conditions, 12037 events. 7927/12037 cut-off events. For 1343018/1343022 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 75156 event pairs, 2773 based on Foata normal form. 10/12046 useless extension candidates. Maximal degree in co-relation 125591. Up to 11540 conditions per place. [2024-06-03 20:16:33,365 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 677 selfloop transitions, 105 changer transitions 0/785 dead transitions. [2024-06-03 20:16:33,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 785 transitions, 19956 flow [2024-06-03 20:16:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:16:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:16:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-03 20:16:33,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-03 20:16:33,366 INFO L175 Difference]: Start difference. First operand has 384 places, 747 transitions, 17959 flow. Second operand 11 states and 168 transitions. [2024-06-03 20:16:33,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 785 transitions, 19956 flow