./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe026_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/safe026_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/safe026_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe026_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 [2024-06-04 15:42:43,168 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:42:43,242 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:42:43,247 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:42:43,248 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:42:43,267 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:42:43,269 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:42:43,269 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:42:43,270 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:42:43,271 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:42:43,271 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:42:43,271 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:42:43,272 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:42:43,273 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:42:43,274 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:42:43,274 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:42:43,275 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:42:43,277 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:42:43,277 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:42:43,278 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:42:43,279 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:42:43,279 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:42:43,279 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:42:43,279 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:42:43,280 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:42:43,280 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:42:43,280 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:42:43,280 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:42:43,280 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:42:43,281 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:42:43,282 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:42:43,282 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:42:43,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:42:43,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:42:43,283 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:42:43,283 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:42:43,283 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:42:43,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:42:43,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:42:43,283 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:42:43,283 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:42:43,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:42:43,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:42:43,284 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:42:43,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:42:43,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:42:43,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:42:43,482 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:42:43,494 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:42:43,495 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe026_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-04 15:42:43,694 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:42:43,695 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:42:43,696 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe026_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-04 15:42:44,784 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:42:44,991 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:42:44,992 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe026_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-04 15:42:45,001 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f630102/ab2e4edf99504cc89443a0afd53f6c67/FLAGfec16781d [2024-06-04 15:42:45,011 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f630102/ab2e4edf99504cc89443a0afd53f6c67 [2024-06-04 15:42:45,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:42:45,014 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:42:45,016 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:42:45,016 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:42:45,020 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:42:45,020 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:42:43" (1/2) ... [2024-06-04 15:42:45,021 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55dbafdb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:42:45, skipping insertion in model container [2024-06-04 15:42:45,021 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:42:43" (1/2) ... [2024-06-04 15:42:45,022 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@69539d14 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:42:45, skipping insertion in model container [2024-06-04 15:42:45,022 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:42:45" (2/2) ... [2024-06-04 15:42:45,022 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55dbafdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45, skipping insertion in model container [2024-06-04 15:42:45,023 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:42:45" (2/2) ... [2024-06-04 15:42:45,023 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:42:45,093 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:42:45,094 INFO L97 edCorrectnessWitness]: Location invariant before [L831-L831] ((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! 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 || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-04 15:42:45,095 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-04 15:42:45,095 INFO L97 edCorrectnessWitness]: Location invariant before [L833-L833] ((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! 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 || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-04 15:42:45,095 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:42:45,095 INFO L106 edCorrectnessWitness]: ghost_update [L829-L829] multithreaded = 1; [2024-06-04 15:42:45,131 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:42:45,525 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:42:45,533 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:42:45,651 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:42:45,690 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:42:45,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45 WrapperNode [2024-06-04 15:42:45,691 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:42:45,692 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:42:45,692 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:42:45,692 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:42:45,697 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45" (1/1) ... [2024-06-04 15:42:45,722 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45" (1/1) ... [2024-06-04 15:42:45,758 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 124 [2024-06-04 15:42:45,759 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:42:45,760 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:42:45,760 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:42:45,760 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:42:45,769 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45" (1/1) ... [2024-06-04 15:42:45,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45" (1/1) ... [2024-06-04 15:42:45,783 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45" (1/1) ... [2024-06-04 15:42:45,806 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]. [2024-06-04 15:42:45,810 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45" (1/1) ... [2024-06-04 15:42:45,810 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45" (1/1) ... [2024-06-04 15:42:45,816 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45" (1/1) ... [2024-06-04 15:42:45,823 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45" (1/1) ... [2024-06-04 15:42:45,825 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45" (1/1) ... [2024-06-04 15:42:45,829 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45" (1/1) ... [2024-06-04 15:42:45,833 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:42:45,836 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:42:45,836 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:42:45,836 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:42:45,837 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45" (1/1) ... [2024-06-04 15:42:45,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:42:45,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:42:45,873 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) [2024-06-04 15:42:45,910 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 [2024-06-04 15:42:45,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:42:45,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:42:45,925 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:42:45,925 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:42:45,925 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:42:45,925 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:42:45,925 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:42:45,925 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:42:45,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:42:45,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:42:45,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:42:45,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:42:45,927 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:42:46,068 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:42:46,070 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:42:46,440 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:42:46,440 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:42:46,546 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:42:46,547 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:42:46,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:42:46 BoogieIcfgContainer [2024-06-04 15:42:46,547 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:42:46,548 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:42:46,548 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:42:46,551 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:42:46,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:42:43" (1/4) ... [2024-06-04 15:42:46,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe15b4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:42:46, skipping insertion in model container [2024-06-04 15:42:46,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:42:45" (2/4) ... [2024-06-04 15:42:46,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe15b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:42:46, skipping insertion in model container [2024-06-04 15:42:46,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:42:45" (3/4) ... [2024-06-04 15:42:46,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe15b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:42:46, skipping insertion in model container [2024-06-04 15:42:46,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:42:46" (4/4) ... [2024-06-04 15:42:46,552 INFO L112 eAbstractionObserver]: Analyzing ICFG safe026_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-04 15:42:46,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:42:46,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 15:42:46,568 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:42:46,607 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:42:46,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-04 15:42:46,659 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-04 15:42:46,660 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:42:46,662 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 61 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. [2024-06-04 15:42:46,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-04 15:42:46,664 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-04 15:42:46,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:42:46,683 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;@12de063c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:42:46,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 15:42:46,689 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:42:46,689 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:42:46,689 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:42:46,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:46,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:42:46,690 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)] === [2024-06-04 15:42:46,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:46,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1490631750, now seen corresponding path program 1 times [2024-06-04 15:42:46,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:46,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101634842] [2024-06-04 15:42:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:46,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:47,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:47,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101634842] [2024-06-04 15:42:47,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101634842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:47,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:47,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:42:47,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465529333] [2024-06-04 15:42:47,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:47,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:42:47,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:47,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:42:47,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:42:47,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-04 15:42:47,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:47,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:47,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-04 15:42:47,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:47,978 INFO L124 PetriNetUnfolderBase]: 1150/1746 cut-off events. [2024-06-04 15:42:47,978 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-04 15:42:47,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3567 conditions, 1746 events. 1150/1746 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7851 event pairs, 805 based on Foata normal form. 3/1712 useless extension candidates. Maximal degree in co-relation 3552. Up to 1726 conditions per place. [2024-06-04 15:42:47,989 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 35 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 15:42:47,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 43 transitions, 179 flow [2024-06-04 15:42:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:42:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:42:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-04 15:42:47,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 15:42:47,999 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-04 15:42:48,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 43 transitions, 179 flow [2024-06-04 15:42:48,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 15:42:48,003 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-04 15:42:48,005 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} [2024-06-04 15:42:48,007 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-04 15:42:48,007 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-04 15:42:48,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:48,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:48,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:48,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:42:48,008 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)] === [2024-06-04 15:42:48,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:48,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2021986201, now seen corresponding path program 1 times [2024-06-04 15:42:48,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:48,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988220905] [2024-06-04 15:42:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:48,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:48,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:48,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988220905] [2024-06-04 15:42:48,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988220905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:48,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:48,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:42:48,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327239830] [2024-06-04 15:42:48,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:48,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:42:48,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:48,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:42:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:42:48,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-04 15:42:48,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:48,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:48,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-04 15:42:48,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:48,805 INFO L124 PetriNetUnfolderBase]: 1154/1751 cut-off events. [2024-06-04 15:42:48,805 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2024-06-04 15:42:48,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4075 conditions, 1751 events. 1154/1751 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7935 event pairs, 630 based on Foata normal form. 5/1754 useless extension candidates. Maximal degree in co-relation 4060. Up to 1716 conditions per place. [2024-06-04 15:42:48,812 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 45 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-04 15:42:48,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 264 flow [2024-06-04 15:42:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:42:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:42:48,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-04 15:42:48,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-04 15:42:48,814 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 92 transitions. [2024-06-04 15:42:48,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 264 flow [2024-06-04 15:42:48,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 56 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:42:48,815 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 154 flow [2024-06-04 15:42:48,815 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=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-04 15:42:48,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-04 15:42:48,816 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 154 flow [2024-06-04 15:42:48,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:48,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:48,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:48,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:42:48,817 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)] === [2024-06-04 15:42:48,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:48,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1742936489, now seen corresponding path program 1 times [2024-06-04 15:42:48,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:48,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522184687] [2024-06-04 15:42:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:48,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:49,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:49,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522184687] [2024-06-04 15:42:49,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522184687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:49,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:49,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 15:42:49,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087901893] [2024-06-04 15:42:49,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:49,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 15:42:49,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:49,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 15:42:49,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 15:42:49,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-04 15:42:49,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:49,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:49,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-04 15:42:49,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:49,645 INFO L124 PetriNetUnfolderBase]: 1409/2119 cut-off events. [2024-06-04 15:42:49,645 INFO L125 PetriNetUnfolderBase]: For 1023/1023 co-relation queries the response was YES. [2024-06-04 15:42:49,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5547 conditions, 2119 events. 1409/2119 cut-off events. For 1023/1023 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9371 event pairs, 626 based on Foata normal form. 7/2125 useless extension candidates. Maximal degree in co-relation 5529. Up to 1980 conditions per place. [2024-06-04 15:42:49,656 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 65 selfloop transitions, 14 changer transitions 0/82 dead transitions. [2024-06-04 15:42:49,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 82 transitions, 451 flow [2024-06-04 15:42:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:42:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:42:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-04 15:42:49,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-04 15:42:49,658 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 154 flow. Second operand 5 states and 116 transitions. [2024-06-04 15:42:49,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 82 transitions, 451 flow [2024-06-04 15:42:49,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 82 transitions, 436 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-04 15:42:49,661 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 257 flow [2024-06-04 15:42:49,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2024-06-04 15:42:49,661 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-04 15:42:49,662 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 257 flow [2024-06-04 15:42:49,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:49,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:49,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:49,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:42:49,662 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)] === [2024-06-04 15:42:49,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:49,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1803544440, now seen corresponding path program 1 times [2024-06-04 15:42:49,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:49,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148240057] [2024-06-04 15:42:49,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:49,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:50,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:50,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148240057] [2024-06-04 15:42:50,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148240057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:50,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:50,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:42:50,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274298774] [2024-06-04 15:42:50,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:50,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:42:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:42:50,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:42:50,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-04 15:42:50,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 257 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:50,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:50,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-04 15:42:50,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:50,829 INFO L124 PetriNetUnfolderBase]: 1431/2152 cut-off events. [2024-06-04 15:42:50,830 INFO L125 PetriNetUnfolderBase]: For 2498/2500 co-relation queries the response was YES. [2024-06-04 15:42:50,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6768 conditions, 2152 events. 1431/2152 cut-off events. For 2498/2500 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9608 event pairs, 502 based on Foata normal form. 9/2160 useless extension candidates. Maximal degree in co-relation 6746. Up to 1969 conditions per place. [2024-06-04 15:42:50,846 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 73 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-06-04 15:42:50,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 583 flow [2024-06-04 15:42:50,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:42:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:42:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-04 15:42:50,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-04 15:42:50,852 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 257 flow. Second operand 6 states and 137 transitions. [2024-06-04 15:42:50,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 583 flow [2024-06-04 15:42:50,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 94 transitions, 579 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 15:42:50,861 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 326 flow [2024-06-04 15:42:50,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=326, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-06-04 15:42:50,863 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-04 15:42:50,863 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 326 flow [2024-06-04 15:42:50,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:50,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:50,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:50,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:42:50,863 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)] === [2024-06-04 15:42:50,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:50,864 INFO L85 PathProgramCache]: Analyzing trace with hash 75303574, now seen corresponding path program 1 times [2024-06-04 15:42:50,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:50,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357615596] [2024-06-04 15:42:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:50,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:51,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:51,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357615596] [2024-06-04 15:42:51,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357615596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:51,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:51,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:42:51,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727806255] [2024-06-04 15:42:51,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:51,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:42:51,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:51,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:42:51,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:42:51,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-04 15:42:51,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:51,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:51,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-04 15:42:51,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:52,270 INFO L124 PetriNetUnfolderBase]: 1534/2333 cut-off events. [2024-06-04 15:42:52,271 INFO L125 PetriNetUnfolderBase]: For 4090/4092 co-relation queries the response was YES. [2024-06-04 15:42:52,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8062 conditions, 2333 events. 1534/2333 cut-off events. For 4090/4092 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10804 event pairs, 374 based on Foata normal form. 32/2364 useless extension candidates. Maximal degree in co-relation 8037. Up to 1932 conditions per place. [2024-06-04 15:42:52,284 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 82 selfloop transitions, 20 changer transitions 0/105 dead transitions. [2024-06-04 15:42:52,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 105 transitions, 702 flow [2024-06-04 15:42:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:42:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:42:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-04 15:42:52,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-04 15:42:52,286 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 326 flow. Second operand 7 states and 157 transitions. [2024-06-04 15:42:52,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 105 transitions, 702 flow [2024-06-04 15:42:52,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 105 transitions, 661 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 15:42:52,290 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 344 flow [2024-06-04 15:42:52,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=344, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2024-06-04 15:42:52,291 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-04 15:42:52,291 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 344 flow [2024-06-04 15:42:52,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:52,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:52,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:52,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:42:52,292 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)] === [2024-06-04 15:42:52,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:52,292 INFO L85 PathProgramCache]: Analyzing trace with hash -166536493, now seen corresponding path program 1 times [2024-06-04 15:42:52,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:52,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597189778] [2024-06-04 15:42:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:52,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:52,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:52,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597189778] [2024-06-04 15:42:52,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597189778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:52,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:52,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:42:52,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580937503] [2024-06-04 15:42:52,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:52,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:42:52,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:52,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:42:52,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:42:52,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:42:52,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 344 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:52,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:52,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:42:52,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:53,097 INFO L124 PetriNetUnfolderBase]: 1524/2318 cut-off events. [2024-06-04 15:42:53,098 INFO L125 PetriNetUnfolderBase]: For 5061/5061 co-relation queries the response was YES. [2024-06-04 15:42:53,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8417 conditions, 2318 events. 1524/2318 cut-off events. For 5061/5061 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10616 event pairs, 534 based on Foata normal form. 4/2321 useless extension candidates. Maximal degree in co-relation 8391. Up to 2287 conditions per place. [2024-06-04 15:42:53,109 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 61 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-04 15:42:53,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 74 transitions, 547 flow [2024-06-04 15:42:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:42:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:42:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-04 15:42:53,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435 [2024-06-04 15:42:53,111 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 344 flow. Second operand 5 states and 87 transitions. [2024-06-04 15:42:53,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 74 transitions, 547 flow [2024-06-04 15:42:53,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 504 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:53,116 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 376 flow [2024-06-04 15:42:53,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=376, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2024-06-04 15:42:53,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-06-04 15:42:53,116 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 376 flow [2024-06-04 15:42:53,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:53,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:53,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:53,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:42:53,117 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)] === [2024-06-04 15:42:53,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1706339184, now seen corresponding path program 1 times [2024-06-04 15:42:53,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:53,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440464303] [2024-06-04 15:42:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:53,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:53,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:53,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440464303] [2024-06-04 15:42:53,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440464303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:53,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:53,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:42:53,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935603646] [2024-06-04 15:42:53,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:53,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:42:53,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:53,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:42:53,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:42:53,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:42:53,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:53,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:53,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:42:53,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:54,012 INFO L124 PetriNetUnfolderBase]: 1536/2337 cut-off events. [2024-06-04 15:42:54,013 INFO L125 PetriNetUnfolderBase]: For 6336/6338 co-relation queries the response was YES. [2024-06-04 15:42:54,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8801 conditions, 2337 events. 1536/2337 cut-off events. For 6336/6338 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10791 event pairs, 466 based on Foata normal form. 10/2346 useless extension candidates. Maximal degree in co-relation 8772. Up to 2185 conditions per place. [2024-06-04 15:42:54,025 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 68 selfloop transitions, 18 changer transitions 0/89 dead transitions. [2024-06-04 15:42:54,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 89 transitions, 652 flow [2024-06-04 15:42:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:42:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:42:54,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-04 15:42:54,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-04 15:42:54,027 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 376 flow. Second operand 6 states and 112 transitions. [2024-06-04 15:42:54,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 89 transitions, 652 flow [2024-06-04 15:42:54,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 632 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-04 15:42:54,033 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 438 flow [2024-06-04 15:42:54,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=438, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-06-04 15:42:54,034 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-04 15:42:54,034 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 438 flow [2024-06-04 15:42:54,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:54,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:54,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:54,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:42:54,035 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)] === [2024-06-04 15:42:54,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:54,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1127744334, now seen corresponding path program 2 times [2024-06-04 15:42:54,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:54,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204497639] [2024-06-04 15:42:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:54,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:54,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:54,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204497639] [2024-06-04 15:42:54,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204497639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:54,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:54,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:42:54,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585297363] [2024-06-04 15:42:54,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:54,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:42:54,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:54,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:42:54,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:42:54,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:42:54,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 438 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:54,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:54,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:42:54,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:54,897 INFO L124 PetriNetUnfolderBase]: 1494/2258 cut-off events. [2024-06-04 15:42:54,897 INFO L125 PetriNetUnfolderBase]: For 7574/7574 co-relation queries the response was YES. [2024-06-04 15:42:54,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8853 conditions, 2258 events. 1494/2258 cut-off events. For 7574/7574 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10143 event pairs, 504 based on Foata normal form. 4/2261 useless extension candidates. Maximal degree in co-relation 8821. Up to 2218 conditions per place. [2024-06-04 15:42:54,914 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 70 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-06-04 15:42:54,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 84 transitions, 650 flow [2024-06-04 15:42:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:42:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:42:54,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 15:42:54,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-04 15:42:54,917 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 438 flow. Second operand 6 states and 102 transitions. [2024-06-04 15:42:54,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 84 transitions, 650 flow [2024-06-04 15:42:54,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 627 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-04 15:42:54,925 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 455 flow [2024-06-04 15:42:54,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=455, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-04 15:42:54,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-04 15:42:54,928 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 455 flow [2024-06-04 15:42:54,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:54,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:54,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:54,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:42:54,929 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)] === [2024-06-04 15:42:54,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:54,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1146504728, now seen corresponding path program 1 times [2024-06-04 15:42:54,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:54,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516421323] [2024-06-04 15:42:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:54,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:55,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:55,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516421323] [2024-06-04 15:42:55,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516421323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:55,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:55,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:42:55,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990365381] [2024-06-04 15:42:55,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:55,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:42:55,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:55,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:42:55,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:42:55,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:42:55,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 455 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-04 15:42:55,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:55,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:42:55,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:56,179 INFO L124 PetriNetUnfolderBase]: 1486/2246 cut-off events. [2024-06-04 15:42:56,180 INFO L125 PetriNetUnfolderBase]: For 8834/8834 co-relation queries the response was YES. [2024-06-04 15:42:56,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8944 conditions, 2246 events. 1486/2246 cut-off events. For 8834/8834 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10058 event pairs, 485 based on Foata normal form. 4/2249 useless extension candidates. Maximal degree in co-relation 8911. Up to 2197 conditions per place. [2024-06-04 15:42:56,190 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 71 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2024-06-04 15:42:56,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 86 transitions, 679 flow [2024-06-04 15:42:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:42:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:42:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 15:42:56,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-04 15:42:56,194 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 455 flow. Second operand 6 states and 102 transitions. [2024-06-04 15:42:56,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 86 transitions, 679 flow [2024-06-04 15:42:56,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 86 transitions, 655 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 15:42:56,203 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 484 flow [2024-06-04 15:42:56,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=484, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-04 15:42:56,203 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2024-06-04 15:42:56,204 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 484 flow [2024-06-04 15:42:56,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-04 15:42:56,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:56,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:56,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:42:56,204 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)] === [2024-06-04 15:42:56,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:56,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1179767766, now seen corresponding path program 1 times [2024-06-04 15:42:56,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:56,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541905497] [2024-06-04 15:42:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:56,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:57,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:57,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541905497] [2024-06-04 15:42:57,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541905497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:57,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:57,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:42:57,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516995233] [2024-06-04 15:42:57,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:57,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:42:57,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:57,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:42:57,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:42:57,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:42:57,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 484 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-04 15:42:57,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:57,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:42:57,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:57,506 INFO L124 PetriNetUnfolderBase]: 1481/2239 cut-off events. [2024-06-04 15:42:57,507 INFO L125 PetriNetUnfolderBase]: For 10349/10349 co-relation queries the response was YES. [2024-06-04 15:42:57,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9205 conditions, 2239 events. 1481/2239 cut-off events. For 10349/10349 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10038 event pairs, 498 based on Foata normal form. 2/2240 useless extension candidates. Maximal degree in co-relation 9172. Up to 2181 conditions per place. [2024-06-04 15:42:57,517 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 70 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2024-06-04 15:42:57,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 89 transitions, 724 flow [2024-06-04 15:42:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:42:57,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:42:57,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-04 15:42:57,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-04 15:42:57,519 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 484 flow. Second operand 6 states and 103 transitions. [2024-06-04 15:42:57,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 89 transitions, 724 flow [2024-06-04 15:42:57,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 89 transitions, 689 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 15:42:57,532 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 525 flow [2024-06-04 15:42:57,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=525, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2024-06-04 15:42:57,533 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-04 15:42:57,533 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 525 flow [2024-06-04 15:42:57,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-04 15:42:57,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:57,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:57,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:42:57,534 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)] === [2024-06-04 15:42:57,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:57,535 INFO L85 PathProgramCache]: Analyzing trace with hash 881779439, now seen corresponding path program 1 times [2024-06-04 15:42:57,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:57,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169045647] [2024-06-04 15:42:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:57,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:58,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:58,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169045647] [2024-06-04 15:42:58,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169045647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:58,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:58,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:42:58,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461868054] [2024-06-04 15:42:58,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:58,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:42:58,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:58,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:42:58,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:42:58,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:42:58,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 525 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-04 15:42:58,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:58,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:42:58,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:58,729 INFO L124 PetriNetUnfolderBase]: 1503/2273 cut-off events. [2024-06-04 15:42:58,729 INFO L125 PetriNetUnfolderBase]: For 12840/12847 co-relation queries the response was YES. [2024-06-04 15:42:58,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9787 conditions, 2273 events. 1503/2273 cut-off events. For 12840/12847 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10322 event pairs, 425 based on Foata normal form. 8/2280 useless extension candidates. Maximal degree in co-relation 9753. Up to 2011 conditions per place. [2024-06-04 15:42:58,741 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 33 changer transitions 0/114 dead transitions. [2024-06-04 15:42:58,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 114 transitions, 995 flow [2024-06-04 15:42:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:42:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:42:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:42:58,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-04 15:42:58,743 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 525 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:42:58,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 114 transitions, 995 flow [2024-06-04 15:42:58,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 114 transitions, 957 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 15:42:58,753 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 670 flow [2024-06-04 15:42:58,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=670, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-04 15:42:58,754 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-04 15:42:58,754 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 670 flow [2024-06-04 15:42:58,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-04 15:42:58,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:58,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:58,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:42:58,755 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)] === [2024-06-04 15:42:58,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:58,755 INFO L85 PathProgramCache]: Analyzing trace with hash 885444569, now seen corresponding path program 2 times [2024-06-04 15:42:58,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:58,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377693153] [2024-06-04 15:42:58,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:58,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:59,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:59,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377693153] [2024-06-04 15:42:59,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377693153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:59,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:59,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:42:59,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208461237] [2024-06-04 15:42:59,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:59,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:42:59,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:59,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:42:59,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:42:59,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:42:59,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 670 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-04 15:42:59,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:59,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:42:59,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:59,847 INFO L124 PetriNetUnfolderBase]: 1509/2281 cut-off events. [2024-06-04 15:42:59,848 INFO L125 PetriNetUnfolderBase]: For 15689/15691 co-relation queries the response was YES. [2024-06-04 15:42:59,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10590 conditions, 2281 events. 1509/2281 cut-off events. For 15689/15691 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10326 event pairs, 433 based on Foata normal form. 6/2286 useless extension candidates. Maximal degree in co-relation 10554. Up to 2118 conditions per place. [2024-06-04 15:42:59,859 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 85 selfloop transitions, 22 changer transitions 0/110 dead transitions. [2024-06-04 15:42:59,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 110 transitions, 986 flow [2024-06-04 15:42:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:42:59,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:42:59,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 15:42:59,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-04 15:42:59,861 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 670 flow. Second operand 7 states and 126 transitions. [2024-06-04 15:42:59,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 110 transitions, 986 flow [2024-06-04 15:42:59,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 110 transitions, 946 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-04 15:42:59,874 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 722 flow [2024-06-04 15:42:59,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=722, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2024-06-04 15:42:59,874 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-04 15:42:59,874 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 722 flow [2024-06-04 15:42:59,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-04 15:42:59,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:59,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:59,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:42:59,875 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)] === [2024-06-04 15:42:59,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:59,876 INFO L85 PathProgramCache]: Analyzing trace with hash 885594671, now seen corresponding path program 1 times [2024-06-04 15:42:59,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:59,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690398910] [2024-06-04 15:42:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:59,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:00,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:00,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690398910] [2024-06-04 15:43:00,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690398910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:00,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:00,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:00,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405998249] [2024-06-04 15:43:00,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:00,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:00,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:00,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:00,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:00,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:00,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 722 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-04 15:43:00,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:00,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:00,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:01,246 INFO L124 PetriNetUnfolderBase]: 1633/2477 cut-off events. [2024-06-04 15:43:01,246 INFO L125 PetriNetUnfolderBase]: For 19476/19478 co-relation queries the response was YES. [2024-06-04 15:43:01,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11871 conditions, 2477 events. 1633/2477 cut-off events. For 19476/19478 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11301 event pairs, 460 based on Foata normal form. 10/2486 useless extension candidates. Maximal degree in co-relation 11833. Up to 2299 conditions per place. [2024-06-04 15:43:01,259 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 96 selfloop transitions, 24 changer transitions 0/123 dead transitions. [2024-06-04 15:43:01,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 123 transitions, 1206 flow [2024-06-04 15:43:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:01,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 15:43:01,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-04 15:43:01,260 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 722 flow. Second operand 8 states and 133 transitions. [2024-06-04 15:43:01,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 123 transitions, 1206 flow [2024-06-04 15:43:01,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 123 transitions, 1127 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:01,278 INFO L231 Difference]: Finished difference. Result has 87 places, 100 transitions, 923 flow [2024-06-04 15:43:01,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=923, PETRI_PLACES=87, PETRI_TRANSITIONS=100} [2024-06-04 15:43:01,279 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-04 15:43:01,279 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 100 transitions, 923 flow [2024-06-04 15:43:01,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-04 15:43:01,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:01,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:01,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:43:01,280 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)] === [2024-06-04 15:43:01,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1423151526, now seen corresponding path program 1 times [2024-06-04 15:43:01,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:01,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318521004] [2024-06-04 15:43:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:01,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:02,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:02,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318521004] [2024-06-04 15:43:02,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318521004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:02,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:02,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:43:02,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145532472] [2024-06-04 15:43:02,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:02,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:43:02,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:02,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:43:02,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:43:02,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:02,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 100 transitions, 923 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-04 15:43:02,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:02,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:02,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:02,455 INFO L124 PetriNetUnfolderBase]: 1628/2467 cut-off events. [2024-06-04 15:43:02,455 INFO L125 PetriNetUnfolderBase]: For 21303/21316 co-relation queries the response was YES. [2024-06-04 15:43:02,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12318 conditions, 2467 events. 1628/2467 cut-off events. For 21303/21316 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11334 event pairs, 452 based on Foata normal form. 12/2478 useless extension candidates. Maximal degree in co-relation 12276. Up to 2218 conditions per place. [2024-06-04 15:43:02,469 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 81 selfloop transitions, 38 changer transitions 0/122 dead transitions. [2024-06-04 15:43:02,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 122 transitions, 1225 flow [2024-06-04 15:43:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:43:02,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:43:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-04 15:43:02,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-04 15:43:02,470 INFO L175 Difference]: Start difference. First operand has 87 places, 100 transitions, 923 flow. Second operand 6 states and 114 transitions. [2024-06-04 15:43:02,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 122 transitions, 1225 flow [2024-06-04 15:43:02,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 122 transitions, 1171 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 15:43:02,495 INFO L231 Difference]: Finished difference. Result has 91 places, 100 transitions, 965 flow [2024-06-04 15:43:02,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=965, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2024-06-04 15:43:02,496 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-04 15:43:02,496 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 965 flow [2024-06-04 15:43:02,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-04 15:43:02,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:02,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:02,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:43:02,497 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)] === [2024-06-04 15:43:02,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:02,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1423151309, now seen corresponding path program 2 times [2024-06-04 15:43:02,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:02,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839684733] [2024-06-04 15:43:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:02,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:03,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:03,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839684733] [2024-06-04 15:43:03,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839684733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:03,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:03,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:03,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718683466] [2024-06-04 15:43:03,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:03,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:03,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:03,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:03,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:03,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:03,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 965 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-04 15:43:03,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:03,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:03,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:03,990 INFO L124 PetriNetUnfolderBase]: 1645/2494 cut-off events. [2024-06-04 15:43:03,991 INFO L125 PetriNetUnfolderBase]: For 25143/25143 co-relation queries the response was YES. [2024-06-04 15:43:03,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12717 conditions, 2494 events. 1645/2494 cut-off events. For 25143/25143 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11390 event pairs, 523 based on Foata normal form. 4/2497 useless extension candidates. Maximal degree in co-relation 12673. Up to 2405 conditions per place. [2024-06-04 15:43:04,003 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 100 selfloop transitions, 19 changer transitions 0/122 dead transitions. [2024-06-04 15:43:04,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 122 transitions, 1283 flow [2024-06-04 15:43:04,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:43:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:43:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-04 15:43:04,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-04 15:43:04,005 INFO L175 Difference]: Start difference. First operand has 91 places, 100 transitions, 965 flow. Second operand 7 states and 118 transitions. [2024-06-04 15:43:04,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 122 transitions, 1283 flow [2024-06-04 15:43:04,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 122 transitions, 1194 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:04,034 INFO L231 Difference]: Finished difference. Result has 93 places, 102 transitions, 954 flow [2024-06-04 15:43:04,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=954, PETRI_PLACES=93, PETRI_TRANSITIONS=102} [2024-06-04 15:43:04,035 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-06-04 15:43:04,035 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 102 transitions, 954 flow [2024-06-04 15:43:04,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-04 15:43:04,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:04,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:04,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:43:04,036 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)] === [2024-06-04 15:43:04,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2089323055, now seen corresponding path program 3 times [2024-06-04 15:43:04,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:04,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119551593] [2024-06-04 15:43:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:04,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:04,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:04,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119551593] [2024-06-04 15:43:04,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119551593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:04,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:04,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:04,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871341054] [2024-06-04 15:43:04,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:04,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:04,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:04,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:04,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:04,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:04,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 102 transitions, 954 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-04 15:43:04,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:04,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:04,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:05,333 INFO L124 PetriNetUnfolderBase]: 1662/2521 cut-off events. [2024-06-04 15:43:05,334 INFO L125 PetriNetUnfolderBase]: For 27456/27456 co-relation queries the response was YES. [2024-06-04 15:43:05,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13051 conditions, 2521 events. 1662/2521 cut-off events. For 27456/27456 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11540 event pairs, 511 based on Foata normal form. 4/2524 useless extension candidates. Maximal degree in co-relation 13006. Up to 2441 conditions per place. [2024-06-04 15:43:05,347 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 106 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2024-06-04 15:43:05,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 124 transitions, 1278 flow [2024-06-04 15:43:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:43:05,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:43:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 15:43:05,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-04 15:43:05,349 INFO L175 Difference]: Start difference. First operand has 93 places, 102 transitions, 954 flow. Second operand 7 states and 117 transitions. [2024-06-04 15:43:05,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 124 transitions, 1278 flow [2024-06-04 15:43:05,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 124 transitions, 1220 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:05,370 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 969 flow [2024-06-04 15:43:05,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=969, PETRI_PLACES=95, PETRI_TRANSITIONS=104} [2024-06-04 15:43:05,371 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-04 15:43:05,371 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 969 flow [2024-06-04 15:43:05,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-04 15:43:05,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:05,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:05,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:43:05,372 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:05,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1158314253, now seen corresponding path program 4 times [2024-06-04 15:43:05,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:05,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228374175] [2024-06-04 15:43:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:05,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:06,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:06,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228374175] [2024-06-04 15:43:06,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228374175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:06,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:06,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:06,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617608461] [2024-06-04 15:43:06,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:06,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:06,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:06,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:06,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:06,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 104 transitions, 969 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-04 15:43:06,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:06,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:06,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:06,907 INFO L124 PetriNetUnfolderBase]: 1791/2719 cut-off events. [2024-06-04 15:43:06,908 INFO L125 PetriNetUnfolderBase]: For 31967/31969 co-relation queries the response was YES. [2024-06-04 15:43:06,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14355 conditions, 2719 events. 1791/2719 cut-off events. For 31967/31969 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12719 event pairs, 448 based on Foata normal form. 10/2728 useless extension candidates. Maximal degree in co-relation 14309. Up to 2359 conditions per place. [2024-06-04 15:43:06,923 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 105 selfloop transitions, 51 changer transitions 0/159 dead transitions. [2024-06-04 15:43:06,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 159 transitions, 1680 flow [2024-06-04 15:43:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 15:43:06,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-04 15:43:06,925 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 969 flow. Second operand 8 states and 145 transitions. [2024-06-04 15:43:06,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 159 transitions, 1680 flow [2024-06-04 15:43:06,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 159 transitions, 1625 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:06,957 INFO L231 Difference]: Finished difference. Result has 101 places, 128 transitions, 1381 flow [2024-06-04 15:43:06,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1381, PETRI_PLACES=101, PETRI_TRANSITIONS=128} [2024-06-04 15:43:06,958 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-04 15:43:06,958 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 128 transitions, 1381 flow [2024-06-04 15:43:06,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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) [2024-06-04 15:43:06,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:06,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:06,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:43:06,959 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)] === [2024-06-04 15:43:06,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:06,960 INFO L85 PathProgramCache]: Analyzing trace with hash -747635613, now seen corresponding path program 1 times [2024-06-04 15:43:06,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:06,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490779863] [2024-06-04 15:43:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:06,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:07,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:07,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490779863] [2024-06-04 15:43:07,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490779863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:07,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:07,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:07,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216363397] [2024-06-04 15:43:07,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:07,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:07,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:07,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:07,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:07,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 128 transitions, 1381 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:07,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:07,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:07,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:08,384 INFO L124 PetriNetUnfolderBase]: 2190/3375 cut-off events. [2024-06-04 15:43:08,384 INFO L125 PetriNetUnfolderBase]: For 45253/45255 co-relation queries the response was YES. [2024-06-04 15:43:08,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18362 conditions, 3375 events. 2190/3375 cut-off events. For 45253/45255 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17009 event pairs, 656 based on Foata normal form. 18/3392 useless extension candidates. Maximal degree in co-relation 18312. Up to 2439 conditions per place. [2024-06-04 15:43:08,405 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 134 selfloop transitions, 46 changer transitions 0/183 dead transitions. [2024-06-04 15:43:08,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 183 transitions, 2093 flow [2024-06-04 15:43:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:08,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 15:43:08,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-04 15:43:08,407 INFO L175 Difference]: Start difference. First operand has 101 places, 128 transitions, 1381 flow. Second operand 9 states and 159 transitions. [2024-06-04 15:43:08,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 183 transitions, 2093 flow [2024-06-04 15:43:08,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 183 transitions, 1992 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 15:43:08,450 INFO L231 Difference]: Finished difference. Result has 108 places, 142 transitions, 1558 flow [2024-06-04 15:43:08,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1558, PETRI_PLACES=108, PETRI_TRANSITIONS=142} [2024-06-04 15:43:08,451 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-04 15:43:08,451 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 142 transitions, 1558 flow [2024-06-04 15:43:08,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:08,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:08,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:08,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:43:08,452 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)] === [2024-06-04 15:43:08,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:08,452 INFO L85 PathProgramCache]: Analyzing trace with hash -747575163, now seen corresponding path program 2 times [2024-06-04 15:43:08,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:08,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303177600] [2024-06-04 15:43:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:08,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:09,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303177600] [2024-06-04 15:43:09,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303177600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:09,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:09,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:09,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672238542] [2024-06-04 15:43:09,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:09,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:09,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:09,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:09,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:09,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:09,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 142 transitions, 1558 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:09,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:09,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:09,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:09,930 INFO L124 PetriNetUnfolderBase]: 2215/3421 cut-off events. [2024-06-04 15:43:09,930 INFO L125 PetriNetUnfolderBase]: For 49053/49055 co-relation queries the response was YES. [2024-06-04 15:43:09,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18876 conditions, 3421 events. 2215/3421 cut-off events. For 49053/49055 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17312 event pairs, 680 based on Foata normal form. 22/3442 useless extension candidates. Maximal degree in co-relation 18823. Up to 2877 conditions per place. [2024-06-04 15:43:09,951 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 127 selfloop transitions, 51 changer transitions 0/181 dead transitions. [2024-06-04 15:43:09,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 181 transitions, 2084 flow [2024-06-04 15:43:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:43:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:43:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-04 15:43:09,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275 [2024-06-04 15:43:09,953 INFO L175 Difference]: Start difference. First operand has 108 places, 142 transitions, 1558 flow. Second operand 10 states and 171 transitions. [2024-06-04 15:43:09,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 181 transitions, 2084 flow [2024-06-04 15:43:10,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 181 transitions, 2038 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 15:43:10,005 INFO L231 Difference]: Finished difference. Result has 115 places, 144 transitions, 1674 flow [2024-06-04 15:43:10,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1674, PETRI_PLACES=115, PETRI_TRANSITIONS=144} [2024-06-04 15:43:10,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-04 15:43:10,005 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 144 transitions, 1674 flow [2024-06-04 15:43:10,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:10,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:10,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:10,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:43:10,006 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)] === [2024-06-04 15:43:10,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:10,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1683632195, now seen corresponding path program 1 times [2024-06-04 15:43:10,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:10,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042289907] [2024-06-04 15:43:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:10,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:10,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:10,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042289907] [2024-06-04 15:43:10,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042289907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:10,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:10,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:10,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309326703] [2024-06-04 15:43:10,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:10,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:10,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:10,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:10,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:10,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:10,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 144 transitions, 1674 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:10,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:10,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:10,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:11,428 INFO L124 PetriNetUnfolderBase]: 2224/3424 cut-off events. [2024-06-04 15:43:11,428 INFO L125 PetriNetUnfolderBase]: For 50496/50505 co-relation queries the response was YES. [2024-06-04 15:43:11,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19380 conditions, 3424 events. 2224/3424 cut-off events. For 50496/50505 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17294 event pairs, 561 based on Foata normal form. 16/3439 useless extension candidates. Maximal degree in co-relation 19324. Up to 2898 conditions per place. [2024-06-04 15:43:11,451 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 117 selfloop transitions, 54 changer transitions 0/174 dead transitions. [2024-06-04 15:43:11,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 174 transitions, 2184 flow [2024-06-04 15:43:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:43:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:43:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-04 15:43:11,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-04 15:43:11,454 INFO L175 Difference]: Start difference. First operand has 115 places, 144 transitions, 1674 flow. Second operand 7 states and 124 transitions. [2024-06-04 15:43:11,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 174 transitions, 2184 flow [2024-06-04 15:43:11,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 174 transitions, 2088 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 15:43:11,511 INFO L231 Difference]: Finished difference. Result has 116 places, 151 transitions, 1832 flow [2024-06-04 15:43:11,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1832, PETRI_PLACES=116, PETRI_TRANSITIONS=151} [2024-06-04 15:43:11,517 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-04 15:43:11,518 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 151 transitions, 1832 flow [2024-06-04 15:43:11,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:11,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:11,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:11,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:43:11,518 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)] === [2024-06-04 15:43:11,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:11,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1168022959, now seen corresponding path program 2 times [2024-06-04 15:43:11,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:11,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700092794] [2024-06-04 15:43:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:11,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:12,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:12,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700092794] [2024-06-04 15:43:12,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700092794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:12,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:12,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:12,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673392260] [2024-06-04 15:43:12,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:12,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:12,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:12,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:12,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:12,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:12,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 151 transitions, 1832 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:12,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:12,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:12,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:12,980 INFO L124 PetriNetUnfolderBase]: 2241/3449 cut-off events. [2024-06-04 15:43:12,980 INFO L125 PetriNetUnfolderBase]: For 53915/53929 co-relation queries the response was YES. [2024-06-04 15:43:12,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20094 conditions, 3449 events. 2241/3449 cut-off events. For 53915/53929 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17491 event pairs, 544 based on Foata normal form. 16/3464 useless extension candidates. Maximal degree in co-relation 20036. Up to 3061 conditions per place. [2024-06-04 15:43:13,002 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 119 selfloop transitions, 58 changer transitions 0/180 dead transitions. [2024-06-04 15:43:13,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 180 transitions, 2314 flow [2024-06-04 15:43:13,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:43:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:43:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-04 15:43:13,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-04 15:43:13,004 INFO L175 Difference]: Start difference. First operand has 116 places, 151 transitions, 1832 flow. Second operand 7 states and 129 transitions. [2024-06-04 15:43:13,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 180 transitions, 2314 flow [2024-06-04 15:43:13,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 180 transitions, 2207 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-04 15:43:13,071 INFO L231 Difference]: Finished difference. Result has 120 places, 153 transitions, 1898 flow [2024-06-04 15:43:13,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1898, PETRI_PLACES=120, PETRI_TRANSITIONS=153} [2024-06-04 15:43:13,072 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-04 15:43:13,072 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 153 transitions, 1898 flow [2024-06-04 15:43:13,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:13,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:13,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:13,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:43:13,073 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)] === [2024-06-04 15:43:13,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1168023145, now seen corresponding path program 1 times [2024-06-04 15:43:13,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:13,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128256421] [2024-06-04 15:43:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:13,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:13,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:13,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128256421] [2024-06-04 15:43:13,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128256421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:13,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:13,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:43:13,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943405785] [2024-06-04 15:43:13,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:13,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:43:13,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:43:13,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:43:14,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:14,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 153 transitions, 1898 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-04 15:43:14,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:14,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:14,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:14,598 INFO L124 PetriNetUnfolderBase]: 2236/3442 cut-off events. [2024-06-04 15:43:14,598 INFO L125 PetriNetUnfolderBase]: For 57190/57204 co-relation queries the response was YES. [2024-06-04 15:43:14,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20492 conditions, 3442 events. 2236/3442 cut-off events. For 57190/57204 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17415 event pairs, 551 based on Foata normal form. 14/3455 useless extension candidates. Maximal degree in co-relation 20432. Up to 3021 conditions per place. [2024-06-04 15:43:14,622 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 116 selfloop transitions, 64 changer transitions 0/183 dead transitions. [2024-06-04 15:43:14,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 183 transitions, 2360 flow [2024-06-04 15:43:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:43:14,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:43:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:43:14,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-04 15:43:14,624 INFO L175 Difference]: Start difference. First operand has 120 places, 153 transitions, 1898 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:43:14,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 183 transitions, 2360 flow [2024-06-04 15:43:14,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 183 transitions, 2207 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:14,703 INFO L231 Difference]: Finished difference. Result has 122 places, 153 transitions, 1893 flow [2024-06-04 15:43:14,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1893, PETRI_PLACES=122, PETRI_TRANSITIONS=153} [2024-06-04 15:43:14,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-04 15:43:14,704 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 153 transitions, 1893 flow [2024-06-04 15:43:14,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-04 15:43:14,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:14,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:14,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:43:14,705 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)] === [2024-06-04 15:43:14,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1159742239, now seen corresponding path program 3 times [2024-06-04 15:43:14,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:14,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774891390] [2024-06-04 15:43:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:14,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:15,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:15,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774891390] [2024-06-04 15:43:15,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774891390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:15,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:15,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:15,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866154798] [2024-06-04 15:43:15,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:15,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:15,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:15,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:15,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:15,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:15,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 153 transitions, 1893 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:15,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:15,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:15,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:16,167 INFO L124 PetriNetUnfolderBase]: 2253/3475 cut-off events. [2024-06-04 15:43:16,167 INFO L125 PetriNetUnfolderBase]: For 63330/63336 co-relation queries the response was YES. [2024-06-04 15:43:16,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20847 conditions, 3475 events. 2253/3475 cut-off events. For 63330/63336 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17595 event pairs, 739 based on Foata normal form. 8/3482 useless extension candidates. Maximal degree in co-relation 20786. Up to 3357 conditions per place. [2024-06-04 15:43:16,188 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 156 selfloop transitions, 17 changer transitions 0/176 dead transitions. [2024-06-04 15:43:16,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 176 transitions, 2343 flow [2024-06-04 15:43:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:16,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 15:43:16,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-04 15:43:16,190 INFO L175 Difference]: Start difference. First operand has 122 places, 153 transitions, 1893 flow. Second operand 8 states and 127 transitions. [2024-06-04 15:43:16,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 176 transitions, 2343 flow [2024-06-04 15:43:16,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 2199 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:16,259 INFO L231 Difference]: Finished difference. Result has 124 places, 155 transitions, 1838 flow [2024-06-04 15:43:16,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1838, PETRI_PLACES=124, PETRI_TRANSITIONS=155} [2024-06-04 15:43:16,260 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-04 15:43:16,260 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 155 transitions, 1838 flow [2024-06-04 15:43:16,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:16,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:16,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:16,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:43:16,260 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:16,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1168016449, now seen corresponding path program 4 times [2024-06-04 15:43:16,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:16,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297836296] [2024-06-04 15:43:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:16,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:17,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:17,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297836296] [2024-06-04 15:43:17,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297836296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:17,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:17,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:17,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211630696] [2024-06-04 15:43:17,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:17,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:17,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:17,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:17,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:17,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 155 transitions, 1838 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:17,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:17,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:17,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:17,795 INFO L124 PetriNetUnfolderBase]: 2245/3460 cut-off events. [2024-06-04 15:43:17,795 INFO L125 PetriNetUnfolderBase]: For 65600/65613 co-relation queries the response was YES. [2024-06-04 15:43:17,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20619 conditions, 3460 events. 2245/3460 cut-off events. For 65600/65613 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17528 event pairs, 562 based on Foata normal form. 14/3473 useless extension candidates. Maximal degree in co-relation 20557. Up to 2847 conditions per place. [2024-06-04 15:43:17,819 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 110 selfloop transitions, 67 changer transitions 0/180 dead transitions. [2024-06-04 15:43:17,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 180 transitions, 2308 flow [2024-06-04 15:43:17,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:43:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:43:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-04 15:43:17,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-04 15:43:17,820 INFO L175 Difference]: Start difference. First operand has 124 places, 155 transitions, 1838 flow. Second operand 7 states and 125 transitions. [2024-06-04 15:43:17,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 180 transitions, 2308 flow [2024-06-04 15:43:17,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 180 transitions, 2237 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:17,897 INFO L231 Difference]: Finished difference. Result has 125 places, 157 transitions, 1967 flow [2024-06-04 15:43:17,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1967, PETRI_PLACES=125, PETRI_TRANSITIONS=157} [2024-06-04 15:43:17,898 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-04 15:43:17,898 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 157 transitions, 1967 flow [2024-06-04 15:43:17,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:17,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:17,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:17,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:43:17,899 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:17,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:17,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1989558971, now seen corresponding path program 3 times [2024-06-04 15:43:17,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:17,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250891823] [2024-06-04 15:43:17,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:17,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:18,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:18,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250891823] [2024-06-04 15:43:18,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250891823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:18,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:18,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:18,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830925218] [2024-06-04 15:43:18,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:18,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:18,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:18,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:18,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:18,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:18,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 157 transitions, 1967 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:18,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:18,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:18,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:19,498 INFO L124 PetriNetUnfolderBase]: 2785/4321 cut-off events. [2024-06-04 15:43:19,498 INFO L125 PetriNetUnfolderBase]: For 91316/91325 co-relation queries the response was YES. [2024-06-04 15:43:19,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26585 conditions, 4321 events. 2785/4321 cut-off events. For 91316/91325 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23315 event pairs, 655 based on Foata normal form. 24/4344 useless extension candidates. Maximal degree in co-relation 26522. Up to 3048 conditions per place. [2024-06-04 15:43:19,525 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 179 selfloop transitions, 72 changer transitions 0/254 dead transitions. [2024-06-04 15:43:19,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 254 transitions, 3507 flow [2024-06-04 15:43:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:43:19,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-04 15:43:19,527 INFO L175 Difference]: Start difference. First operand has 125 places, 157 transitions, 1967 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:43:19,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 254 transitions, 3507 flow [2024-06-04 15:43:19,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 254 transitions, 3305 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:19,631 INFO L231 Difference]: Finished difference. Result has 133 places, 199 transitions, 2745 flow [2024-06-04 15:43:19,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2745, PETRI_PLACES=133, PETRI_TRANSITIONS=199} [2024-06-04 15:43:19,631 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-04 15:43:19,631 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 199 transitions, 2745 flow [2024-06-04 15:43:19,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:19,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:19,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:19,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:43:19,632 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:19,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:19,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1708132117, now seen corresponding path program 4 times [2024-06-04 15:43:19,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:19,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159748222] [2024-06-04 15:43:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:19,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:20,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:20,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159748222] [2024-06-04 15:43:20,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159748222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:20,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:20,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:20,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316217891] [2024-06-04 15:43:20,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:20,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:20,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:20,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:20,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:20,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:20,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 199 transitions, 2745 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:20,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:20,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:20,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:21,308 INFO L124 PetriNetUnfolderBase]: 2873/4467 cut-off events. [2024-06-04 15:43:21,309 INFO L125 PetriNetUnfolderBase]: For 100344/100373 co-relation queries the response was YES. [2024-06-04 15:43:21,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28470 conditions, 4467 events. 2873/4467 cut-off events. For 100344/100373 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24439 event pairs, 670 based on Foata normal form. 46/4512 useless extension candidates. Maximal degree in co-relation 28402. Up to 3787 conditions per place. [2024-06-04 15:43:21,347 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 178 selfloop transitions, 72 changer transitions 0/253 dead transitions. [2024-06-04 15:43:21,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 253 transitions, 3588 flow [2024-06-04 15:43:21,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:43:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:43:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-04 15:43:21,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-04 15:43:21,349 INFO L175 Difference]: Start difference. First operand has 133 places, 199 transitions, 2745 flow. Second operand 10 states and 182 transitions. [2024-06-04 15:43:21,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 253 transitions, 3588 flow [2024-06-04 15:43:21,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 253 transitions, 3557 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 15:43:21,522 INFO L231 Difference]: Finished difference. Result has 142 places, 206 transitions, 3023 flow [2024-06-04 15:43:21,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2714, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3023, PETRI_PLACES=142, PETRI_TRANSITIONS=206} [2024-06-04 15:43:21,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-04 15:43:21,523 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 206 transitions, 3023 flow [2024-06-04 15:43:21,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-04 15:43:21,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:21,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:21,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:43:21,524 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:21,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:21,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1763868023, now seen corresponding path program 5 times [2024-06-04 15:43:21,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:21,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245441861] [2024-06-04 15:43:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:21,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:21,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:21,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245441861] [2024-06-04 15:43:21,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245441861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:21,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:21,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:43:21,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560211110] [2024-06-04 15:43:21,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:21,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:43:21,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:21,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:43:21,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:43:22,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:22,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 206 transitions, 3023 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-04 15:43:22,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:22,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:22,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:23,030 INFO L124 PetriNetUnfolderBase]: 3664/5846 cut-off events. [2024-06-04 15:43:23,031 INFO L125 PetriNetUnfolderBase]: For 138216/138245 co-relation queries the response was YES. [2024-06-04 15:43:23,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37393 conditions, 5846 events. 3664/5846 cut-off events. For 138216/138245 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 35382 event pairs, 626 based on Foata normal form. 36/5881 useless extension candidates. Maximal degree in co-relation 37322. Up to 2369 conditions per place. [2024-06-04 15:43:23,073 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 144 selfloop transitions, 140 changer transitions 0/287 dead transitions. [2024-06-04 15:43:23,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 287 transitions, 4516 flow [2024-06-04 15:43:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-04 15:43:23,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-06-04 15:43:23,076 INFO L175 Difference]: Start difference. First operand has 142 places, 206 transitions, 3023 flow. Second operand 8 states and 158 transitions. [2024-06-04 15:43:23,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 287 transitions, 4516 flow [2024-06-04 15:43:23,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 287 transitions, 4357 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 15:43:23,300 INFO L231 Difference]: Finished difference. Result has 145 places, 235 transitions, 3779 flow [2024-06-04 15:43:23,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2883, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3779, PETRI_PLACES=145, PETRI_TRANSITIONS=235} [2024-06-04 15:43:23,301 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-04 15:43:23,301 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 235 transitions, 3779 flow [2024-06-04 15:43:23,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-04 15:43:23,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:23,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:23,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:43:23,302 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)] === [2024-06-04 15:43:23,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:23,302 INFO L85 PathProgramCache]: Analyzing trace with hash -422438465, now seen corresponding path program 6 times [2024-06-04 15:43:23,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:23,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420120625] [2024-06-04 15:43:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:23,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:23,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:23,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420120625] [2024-06-04 15:43:23,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420120625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:23,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:23,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:43:23,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491169817] [2024-06-04 15:43:23,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:23,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:43:23,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:23,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:43:23,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:43:23,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:23,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 235 transitions, 3779 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-04 15:43:23,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:23,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:23,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:25,040 INFO L124 PetriNetUnfolderBase]: 4296/6835 cut-off events. [2024-06-04 15:43:25,040 INFO L125 PetriNetUnfolderBase]: For 177805/177834 co-relation queries the response was YES. [2024-06-04 15:43:25,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46292 conditions, 6835 events. 4296/6835 cut-off events. For 177805/177834 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 42582 event pairs, 1234 based on Foata normal form. 44/6878 useless extension candidates. Maximal degree in co-relation 46218. Up to 3948 conditions per place. [2024-06-04 15:43:25,104 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 168 selfloop transitions, 153 changer transitions 0/324 dead transitions. [2024-06-04 15:43:25,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 324 transitions, 5494 flow [2024-06-04 15:43:25,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 15:43:25,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-04 15:43:25,106 INFO L175 Difference]: Start difference. First operand has 145 places, 235 transitions, 3779 flow. Second operand 8 states and 156 transitions. [2024-06-04 15:43:25,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 324 transitions, 5494 flow [2024-06-04 15:43:25,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 324 transitions, 5336 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-04 15:43:25,471 INFO L231 Difference]: Finished difference. Result has 152 places, 272 transitions, 4773 flow [2024-06-04 15:43:25,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4773, PETRI_PLACES=152, PETRI_TRANSITIONS=272} [2024-06-04 15:43:25,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-04 15:43:25,472 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 272 transitions, 4773 flow [2024-06-04 15:43:25,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-04 15:43:25,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:25,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:25,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 15:43:25,473 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:25,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:25,473 INFO L85 PathProgramCache]: Analyzing trace with hash -421830245, now seen corresponding path program 7 times [2024-06-04 15:43:25,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:25,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216464053] [2024-06-04 15:43:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:25,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:26,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:26,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216464053] [2024-06-04 15:43:26,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216464053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:26,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:26,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:43:26,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464694367] [2024-06-04 15:43:26,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:26,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:43:26,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:26,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:43:26,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:43:26,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:26,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 272 transitions, 4773 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-04 15:43:26,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:26,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:26,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:27,317 INFO L124 PetriNetUnfolderBase]: 4356/6925 cut-off events. [2024-06-04 15:43:27,317 INFO L125 PetriNetUnfolderBase]: For 187506/187563 co-relation queries the response was YES. [2024-06-04 15:43:27,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48302 conditions, 6925 events. 4356/6925 cut-off events. For 187506/187563 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 43409 event pairs, 1294 based on Foata normal form. 70/6994 useless extension candidates. Maximal degree in co-relation 48224. Up to 5589 conditions per place. [2024-06-04 15:43:27,366 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 184 selfloop transitions, 128 changer transitions 0/315 dead transitions. [2024-06-04 15:43:27,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 315 transitions, 5718 flow [2024-06-04 15:43:27,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:43:27,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-04 15:43:27,368 INFO L175 Difference]: Start difference. First operand has 152 places, 272 transitions, 4773 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:43:27,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 315 transitions, 5718 flow [2024-06-04 15:43:27,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 315 transitions, 5630 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-04 15:43:27,699 INFO L231 Difference]: Finished difference. Result has 158 places, 278 transitions, 5173 flow [2024-06-04 15:43:27,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4691, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5173, PETRI_PLACES=158, PETRI_TRANSITIONS=278} [2024-06-04 15:43:27,700 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-04 15:43:27,700 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 278 transitions, 5173 flow [2024-06-04 15:43:27,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-04 15:43:27,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:27,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:27,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:43:27,701 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)] === [2024-06-04 15:43:27,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash -2064633939, now seen corresponding path program 1 times [2024-06-04 15:43:27,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:27,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682808925] [2024-06-04 15:43:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:27,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:28,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:28,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682808925] [2024-06-04 15:43:28,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682808925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:28,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:28,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:43:28,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339344651] [2024-06-04 15:43:28,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:28,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:43:28,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:28,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:43:28,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:43:28,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:28,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 278 transitions, 5173 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:28,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:28,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:28,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:29,316 INFO L124 PetriNetUnfolderBase]: 4386/6968 cut-off events. [2024-06-04 15:43:29,316 INFO L125 PetriNetUnfolderBase]: For 186024/186024 co-relation queries the response was YES. [2024-06-04 15:43:29,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49444 conditions, 6968 events. 4386/6968 cut-off events. For 186024/186024 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 43751 event pairs, 1985 based on Foata normal form. 6/6973 useless extension candidates. Maximal degree in co-relation 49364. Up to 6757 conditions per place. [2024-06-04 15:43:29,379 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 279 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2024-06-04 15:43:29,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 303 transitions, 5951 flow [2024-06-04 15:43:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:43:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:43:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-04 15:43:29,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-04 15:43:29,381 INFO L175 Difference]: Start difference. First operand has 158 places, 278 transitions, 5173 flow. Second operand 6 states and 108 transitions. [2024-06-04 15:43:29,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 303 transitions, 5951 flow [2024-06-04 15:43:29,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 303 transitions, 5706 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:29,745 INFO L231 Difference]: Finished difference. Result has 159 places, 284 transitions, 5039 flow [2024-06-04 15:43:29,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4928, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5039, PETRI_PLACES=159, PETRI_TRANSITIONS=284} [2024-06-04 15:43:29,746 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-04 15:43:29,746 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 284 transitions, 5039 flow [2024-06-04 15:43:29,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:29,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:29,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:29,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:43:29,747 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)] === [2024-06-04 15:43:29,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash 116268239, now seen corresponding path program 2 times [2024-06-04 15:43:29,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:29,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429654764] [2024-06-04 15:43:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:29,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:30,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:30,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429654764] [2024-06-04 15:43:30,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429654764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:30,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:30,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:43:30,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79535495] [2024-06-04 15:43:30,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:30,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:43:30,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:30,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:43:30,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:43:30,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:30,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 284 transitions, 5039 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:30,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:30,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:30,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:31,345 INFO L124 PetriNetUnfolderBase]: 4368/6942 cut-off events. [2024-06-04 15:43:31,345 INFO L125 PetriNetUnfolderBase]: For 184282/184282 co-relation queries the response was YES. [2024-06-04 15:43:31,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49023 conditions, 6942 events. 4368/6942 cut-off events. For 184282/184282 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 43586 event pairs, 1989 based on Foata normal form. 6/6947 useless extension candidates. Maximal degree in co-relation 48942. Up to 6770 conditions per place. [2024-06-04 15:43:31,410 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 277 selfloop transitions, 18 changer transitions 0/298 dead transitions. [2024-06-04 15:43:31,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 298 transitions, 5677 flow [2024-06-04 15:43:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:43:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:43:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-04 15:43:31,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-04 15:43:31,412 INFO L175 Difference]: Start difference. First operand has 159 places, 284 transitions, 5039 flow. Second operand 5 states and 92 transitions. [2024-06-04 15:43:31,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 298 transitions, 5677 flow [2024-06-04 15:43:31,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 298 transitions, 5634 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-04 15:43:31,767 INFO L231 Difference]: Finished difference. Result has 162 places, 284 transitions, 5045 flow [2024-06-04 15:43:31,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4996, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5045, PETRI_PLACES=162, PETRI_TRANSITIONS=284} [2024-06-04 15:43:31,768 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-04 15:43:31,768 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 284 transitions, 5045 flow [2024-06-04 15:43:31,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:31,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:31,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:31,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:43:31,769 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:31,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:31,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1783299869, now seen corresponding path program 1 times [2024-06-04 15:43:31,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:31,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985882065] [2024-06-04 15:43:31,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:31,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:32,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:32,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985882065] [2024-06-04 15:43:32,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985882065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:32,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:32,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:43:32,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843910436] [2024-06-04 15:43:32,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:32,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:43:32,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:32,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:43:32,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:43:32,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:32,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 284 transitions, 5045 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:32,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:32,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:32,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:33,548 INFO L124 PetriNetUnfolderBase]: 4557/7197 cut-off events. [2024-06-04 15:43:33,548 INFO L125 PetriNetUnfolderBase]: For 198410/198420 co-relation queries the response was YES. [2024-06-04 15:43:33,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51268 conditions, 7197 events. 4557/7197 cut-off events. For 198410/198420 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 45203 event pairs, 1580 based on Foata normal form. 19/7215 useless extension candidates. Maximal degree in co-relation 51185. Up to 6519 conditions per place. [2024-06-04 15:43:33,609 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 268 selfloop transitions, 63 changer transitions 0/334 dead transitions. [2024-06-04 15:43:33,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 334 transitions, 6166 flow [2024-06-04 15:43:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:43:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:43:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-04 15:43:33,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48928571428571427 [2024-06-04 15:43:33,611 INFO L175 Difference]: Start difference. First operand has 162 places, 284 transitions, 5045 flow. Second operand 7 states and 137 transitions. [2024-06-04 15:43:33,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 334 transitions, 6166 flow [2024-06-04 15:43:34,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 334 transitions, 6128 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 15:43:34,006 INFO L231 Difference]: Finished difference. Result has 167 places, 300 transitions, 5397 flow [2024-06-04 15:43:34,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5009, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5397, PETRI_PLACES=167, PETRI_TRANSITIONS=300} [2024-06-04 15:43:34,008 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-04 15:43:34,008 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 300 transitions, 5397 flow [2024-06-04 15:43:34,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:34,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:34,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:34,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 15:43:34,009 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:34,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:34,010 INFO L85 PathProgramCache]: Analyzing trace with hash 652991694, now seen corresponding path program 1 times [2024-06-04 15:43:34,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:34,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301170596] [2024-06-04 15:43:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:34,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:35,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:35,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301170596] [2024-06-04 15:43:35,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301170596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:35,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:35,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:43:35,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389484740] [2024-06-04 15:43:35,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:35,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:43:35,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:35,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:43:35,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:43:35,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:35,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 300 transitions, 5397 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:35,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:35,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:35,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:36,565 INFO L124 PetriNetUnfolderBase]: 4465/7061 cut-off events. [2024-06-04 15:43:36,565 INFO L125 PetriNetUnfolderBase]: For 209552/209563 co-relation queries the response was YES. [2024-06-04 15:43:36,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50765 conditions, 7061 events. 4465/7061 cut-off events. For 209552/209563 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 44286 event pairs, 1447 based on Foata normal form. 58/7118 useless extension candidates. Maximal degree in co-relation 50679. Up to 5955 conditions per place. [2024-06-04 15:43:36,637 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 239 selfloop transitions, 88 changer transitions 0/330 dead transitions. [2024-06-04 15:43:36,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 330 transitions, 6155 flow [2024-06-04 15:43:36,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:43:36,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-04 15:43:36,638 INFO L175 Difference]: Start difference. First operand has 167 places, 300 transitions, 5397 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:43:36,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 330 transitions, 6155 flow [2024-06-04 15:43:37,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 330 transitions, 6071 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-04 15:43:37,225 INFO L231 Difference]: Finished difference. Result has 174 places, 300 transitions, 5500 flow [2024-06-04 15:43:37,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5500, PETRI_PLACES=174, PETRI_TRANSITIONS=300} [2024-06-04 15:43:37,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-04 15:43:37,226 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 300 transitions, 5500 flow [2024-06-04 15:43:37,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:37,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:37,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:37,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 15:43:37,227 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)] === [2024-06-04 15:43:37,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:37,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1709857787, now seen corresponding path program 2 times [2024-06-04 15:43:37,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:37,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393607193] [2024-06-04 15:43:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:37,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:37,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:37,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393607193] [2024-06-04 15:43:37,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393607193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:37,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:37,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:43:37,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238010031] [2024-06-04 15:43:37,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:37,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:43:37,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:37,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:43:37,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:43:38,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:38,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 300 transitions, 5500 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:38,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:38,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:38,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:39,157 INFO L124 PetriNetUnfolderBase]: 4633/7296 cut-off events. [2024-06-04 15:43:39,157 INFO L125 PetriNetUnfolderBase]: For 204367/204375 co-relation queries the response was YES. [2024-06-04 15:43:39,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53120 conditions, 7296 events. 4633/7296 cut-off events. For 204367/204375 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 45695 event pairs, 1709 based on Foata normal form. 17/7312 useless extension candidates. Maximal degree in co-relation 53031. Up to 6995 conditions per place. [2024-06-04 15:43:39,232 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 307 selfloop transitions, 29 changer transitions 0/339 dead transitions. [2024-06-04 15:43:39,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 339 transitions, 6505 flow [2024-06-04 15:43:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:43:39,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-04 15:43:39,234 INFO L175 Difference]: Start difference. First operand has 174 places, 300 transitions, 5500 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:43:39,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 339 transitions, 6505 flow [2024-06-04 15:43:39,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 339 transitions, 6220 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:39,827 INFO L231 Difference]: Finished difference. Result has 177 places, 311 transitions, 5446 flow [2024-06-04 15:43:39,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5215, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5446, PETRI_PLACES=177, PETRI_TRANSITIONS=311} [2024-06-04 15:43:39,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-04 15:43:39,828 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 311 transitions, 5446 flow [2024-06-04 15:43:39,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:39,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:39,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:39,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 15:43:39,829 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)] === [2024-06-04 15:43:39,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:39,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2089766094, now seen corresponding path program 2 times [2024-06-04 15:43:39,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:39,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395712065] [2024-06-04 15:43:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:39,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:40,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:40,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395712065] [2024-06-04 15:43:40,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395712065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:40,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:40,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:40,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237399270] [2024-06-04 15:43:40,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:40,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:40,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:40,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:40,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:40,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:40,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 311 transitions, 5446 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-04 15:43:40,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:40,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:40,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:41,899 INFO L124 PetriNetUnfolderBase]: 4613/7253 cut-off events. [2024-06-04 15:43:41,900 INFO L125 PetriNetUnfolderBase]: For 199605/199611 co-relation queries the response was YES. [2024-06-04 15:43:41,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51888 conditions, 7253 events. 4613/7253 cut-off events. For 199605/199611 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 44976 event pairs, 1980 based on Foata normal form. 16/7268 useless extension candidates. Maximal degree in co-relation 51797. Up to 6995 conditions per place. [2024-06-04 15:43:42,083 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 319 selfloop transitions, 17 changer transitions 0/339 dead transitions. [2024-06-04 15:43:42,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 339 transitions, 6210 flow [2024-06-04 15:43:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:42,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 15:43:42,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-04 15:43:42,084 INFO L175 Difference]: Start difference. First operand has 177 places, 311 transitions, 5446 flow. Second operand 8 states and 134 transitions. [2024-06-04 15:43:42,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 339 transitions, 6210 flow [2024-06-04 15:43:42,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 339 transitions, 6096 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-04 15:43:42,551 INFO L231 Difference]: Finished difference. Result has 181 places, 311 transitions, 5372 flow [2024-06-04 15:43:42,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5372, PETRI_PLACES=181, PETRI_TRANSITIONS=311} [2024-06-04 15:43:42,552 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-04 15:43:42,552 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 311 transitions, 5372 flow [2024-06-04 15:43:42,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-04 15:43:42,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:42,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:42,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 15:43:42,553 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)] === [2024-06-04 15:43:42,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1848972160, now seen corresponding path program 3 times [2024-06-04 15:43:42,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:42,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25350762] [2024-06-04 15:43:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:42,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:43,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:43,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25350762] [2024-06-04 15:43:43,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25350762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:43,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:43,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:43,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509604044] [2024-06-04 15:43:43,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:43,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:43,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:43,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:43,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 311 transitions, 5372 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-04 15:43:43,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:43,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:43,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:44,898 INFO L124 PetriNetUnfolderBase]: 4898/7751 cut-off events. [2024-06-04 15:43:44,898 INFO L125 PetriNetUnfolderBase]: For 208175/208186 co-relation queries the response was YES. [2024-06-04 15:43:44,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54070 conditions, 7751 events. 4898/7751 cut-off events. For 208175/208186 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 49619 event pairs, 1549 based on Foata normal form. 34/7784 useless extension candidates. Maximal degree in co-relation 53978. Up to 6761 conditions per place. [2024-06-04 15:43:44,979 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 265 selfloop transitions, 90 changer transitions 0/358 dead transitions. [2024-06-04 15:43:44,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 358 transitions, 6502 flow [2024-06-04 15:43:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 15:43:44,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-04 15:43:44,980 INFO L175 Difference]: Start difference. First operand has 181 places, 311 transitions, 5372 flow. Second operand 8 states and 145 transitions. [2024-06-04 15:43:44,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 358 transitions, 6502 flow [2024-06-04 15:43:45,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 358 transitions, 6305 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 15:43:45,530 INFO L231 Difference]: Finished difference. Result has 181 places, 320 transitions, 5631 flow [2024-06-04 15:43:45,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5184, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5631, PETRI_PLACES=181, PETRI_TRANSITIONS=320} [2024-06-04 15:43:45,531 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-04 15:43:45,531 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 320 transitions, 5631 flow [2024-06-04 15:43:45,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-04 15:43:45,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:45,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:45,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 15:43:45,532 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:45,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1848977895, now seen corresponding path program 1 times [2024-06-04 15:43:45,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:45,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233578043] [2024-06-04 15:43:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:45,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:46,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:46,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233578043] [2024-06-04 15:43:46,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233578043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:46,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:46,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:46,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714607930] [2024-06-04 15:43:46,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:46,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:46,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:46,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:46,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 320 transitions, 5631 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-04 15:43:46,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:46,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:46,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:47,866 INFO L124 PetriNetUnfolderBase]: 4975/7892 cut-off events. [2024-06-04 15:43:47,866 INFO L125 PetriNetUnfolderBase]: For 218326/218346 co-relation queries the response was YES. [2024-06-04 15:43:47,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54222 conditions, 7892 events. 4975/7892 cut-off events. For 218326/218346 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 50675 event pairs, 1356 based on Foata normal form. 48/7939 useless extension candidates. Maximal degree in co-relation 54131. Up to 6506 conditions per place. [2024-06-04 15:43:47,961 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 247 selfloop transitions, 117 changer transitions 0/367 dead transitions. [2024-06-04 15:43:47,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 367 transitions, 6709 flow [2024-06-04 15:43:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:43:47,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-04 15:43:47,962 INFO L175 Difference]: Start difference. First operand has 181 places, 320 transitions, 5631 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:43:47,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 367 transitions, 6709 flow [2024-06-04 15:43:48,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 367 transitions, 6448 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:48,649 INFO L231 Difference]: Finished difference. Result has 183 places, 323 transitions, 5772 flow [2024-06-04 15:43:48,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5370, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5772, PETRI_PLACES=183, PETRI_TRANSITIONS=323} [2024-06-04 15:43:48,650 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2024-06-04 15:43:48,650 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 323 transitions, 5772 flow [2024-06-04 15:43:48,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-04 15:43:48,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:48,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:48,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 15:43:48,651 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:48,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:48,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1848770350, now seen corresponding path program 4 times [2024-06-04 15:43:48,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:48,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664695057] [2024-06-04 15:43:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:48,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:49,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:49,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664695057] [2024-06-04 15:43:49,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664695057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:49,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:49,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:49,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589190119] [2024-06-04 15:43:49,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:49,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:49,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:49,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:49,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:49,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:49,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 323 transitions, 5772 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-04 15:43:49,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:49,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:49,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:50,793 INFO L124 PetriNetUnfolderBase]: 4929/7827 cut-off events. [2024-06-04 15:43:50,794 INFO L125 PetriNetUnfolderBase]: For 209446/209458 co-relation queries the response was YES. [2024-06-04 15:43:50,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53125 conditions, 7827 events. 4929/7827 cut-off events. For 209446/209458 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 50526 event pairs, 1512 based on Foata normal form. 34/7860 useless extension candidates. Maximal degree in co-relation 53033. Up to 6405 conditions per place. [2024-06-04 15:43:50,905 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 236 selfloop transitions, 114 changer transitions 0/353 dead transitions. [2024-06-04 15:43:50,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 353 transitions, 6520 flow [2024-06-04 15:43:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:43:50,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-04 15:43:50,907 INFO L175 Difference]: Start difference. First operand has 183 places, 323 transitions, 5772 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:43:50,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 353 transitions, 6520 flow [2024-06-04 15:43:51,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 353 transitions, 6217 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:51,620 INFO L231 Difference]: Finished difference. Result has 184 places, 322 transitions, 5646 flow [2024-06-04 15:43:51,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5646, PETRI_PLACES=184, PETRI_TRANSITIONS=322} [2024-06-04 15:43:51,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-04 15:43:51,620 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 322 transitions, 5646 flow [2024-06-04 15:43:51,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-04 15:43:51,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:51,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:51,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 15:43:51,621 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)] === [2024-06-04 15:43:51,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:51,622 INFO L85 PathProgramCache]: Analyzing trace with hash 809518370, now seen corresponding path program 1 times [2024-06-04 15:43:51,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:51,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225781969] [2024-06-04 15:43:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:51,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:52,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:52,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225781969] [2024-06-04 15:43:52,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225781969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:52,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:52,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:43:52,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373026326] [2024-06-04 15:43:52,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:52,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:43:52,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:52,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:43:52,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:43:52,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:52,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 322 transitions, 5646 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:52,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:52,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:52,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:53,491 INFO L124 PetriNetUnfolderBase]: 4923/7806 cut-off events. [2024-06-04 15:43:53,491 INFO L125 PetriNetUnfolderBase]: For 190380/190388 co-relation queries the response was YES. [2024-06-04 15:43:53,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52544 conditions, 7806 events. 4923/7806 cut-off events. For 190380/190388 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 50171 event pairs, 1906 based on Foata normal form. 10/7815 useless extension candidates. Maximal degree in co-relation 52451. Up to 7625 conditions per place. [2024-06-04 15:43:53,569 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 316 selfloop transitions, 23 changer transitions 0/342 dead transitions. [2024-06-04 15:43:53,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 342 transitions, 6444 flow [2024-06-04 15:43:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:43:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:43:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-04 15:43:53,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-04 15:43:53,570 INFO L175 Difference]: Start difference. First operand has 184 places, 322 transitions, 5646 flow. Second operand 5 states and 93 transitions. [2024-06-04 15:43:53,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 342 transitions, 6444 flow [2024-06-04 15:43:53,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 342 transitions, 6150 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-04 15:43:53,983 INFO L231 Difference]: Finished difference. Result has 182 places, 325 transitions, 5465 flow [2024-06-04 15:43:53,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5352, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5465, PETRI_PLACES=182, PETRI_TRANSITIONS=325} [2024-06-04 15:43:53,983 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-04 15:43:53,983 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 325 transitions, 5465 flow [2024-06-04 15:43:53,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:53,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:53,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:53,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 15:43:53,984 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)] === [2024-06-04 15:43:53,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:53,984 INFO L85 PathProgramCache]: Analyzing trace with hash -719434739, now seen corresponding path program 3 times [2024-06-04 15:43:53,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:53,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041730349] [2024-06-04 15:43:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:53,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:54,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:54,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041730349] [2024-06-04 15:43:54,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041730349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:54,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:54,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:43:54,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496598640] [2024-06-04 15:43:54,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:54,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:43:54,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:43:54,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:43:54,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:54,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 325 transitions, 5465 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:54,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:54,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:54,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:55,919 INFO L124 PetriNetUnfolderBase]: 5052/7980 cut-off events. [2024-06-04 15:43:55,919 INFO L125 PetriNetUnfolderBase]: For 191736/191744 co-relation queries the response was YES. [2024-06-04 15:43:55,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53265 conditions, 7980 events. 5052/7980 cut-off events. For 191736/191744 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 51267 event pairs, 1793 based on Foata normal form. 17/7996 useless extension candidates. Maximal degree in co-relation 53172. Up to 7425 conditions per place. [2024-06-04 15:43:56,023 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 290 selfloop transitions, 74 changer transitions 0/367 dead transitions. [2024-06-04 15:43:56,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 367 transitions, 6552 flow [2024-06-04 15:43:56,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:43:56,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:43:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:43:56,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-04 15:43:56,025 INFO L175 Difference]: Start difference. First operand has 182 places, 325 transitions, 5465 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:43:56,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 367 transitions, 6552 flow [2024-06-04 15:43:56,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 367 transitions, 6501 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 15:43:56,557 INFO L231 Difference]: Finished difference. Result has 188 places, 334 transitions, 5800 flow [2024-06-04 15:43:56,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5414, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5800, PETRI_PLACES=188, PETRI_TRANSITIONS=334} [2024-06-04 15:43:56,558 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-04 15:43:56,558 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 334 transitions, 5800 flow [2024-06-04 15:43:56,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:56,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:56,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:56,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 15:43:56,558 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)] === [2024-06-04 15:43:56,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash -719034560, now seen corresponding path program 1 times [2024-06-04 15:43:56,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:56,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752175436] [2024-06-04 15:43:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:56,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:57,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:57,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752175436] [2024-06-04 15:43:57,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752175436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:57,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:57,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:57,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349772951] [2024-06-04 15:43:57,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:57,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:57,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:57,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:57,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:43:57,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 334 transitions, 5800 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) [2024-06-04 15:43:57,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:57,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:43:57,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:58,947 INFO L124 PetriNetUnfolderBase]: 5047/7980 cut-off events. [2024-06-04 15:43:58,948 INFO L125 PetriNetUnfolderBase]: For 201651/201651 co-relation queries the response was YES. [2024-06-04 15:43:58,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54223 conditions, 7980 events. 5047/7980 cut-off events. For 201651/201651 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 51107 event pairs, 2276 based on Foata normal form. 2/7981 useless extension candidates. Maximal degree in co-relation 54127. Up to 7844 conditions per place. [2024-06-04 15:43:59,026 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 330 selfloop transitions, 12 changer transitions 0/345 dead transitions. [2024-06-04 15:43:59,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 345 transitions, 6538 flow [2024-06-04 15:43:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:43:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:43:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-04 15:43:59,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-04 15:43:59,027 INFO L175 Difference]: Start difference. First operand has 188 places, 334 transitions, 5800 flow. Second operand 5 states and 84 transitions. [2024-06-04 15:43:59,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 345 transitions, 6538 flow [2024-06-04 15:43:59,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 345 transitions, 6428 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 15:43:59,486 INFO L231 Difference]: Finished difference. Result has 190 places, 336 transitions, 5751 flow [2024-06-04 15:43:59,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5690, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5751, PETRI_PLACES=190, PETRI_TRANSITIONS=336} [2024-06-04 15:43:59,487 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-04 15:43:59,487 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 336 transitions, 5751 flow [2024-06-04 15:43:59,487 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) [2024-06-04 15:43:59,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:59,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:59,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 15:43:59,488 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)] === [2024-06-04 15:43:59,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:59,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1457414016, now seen corresponding path program 1 times [2024-06-04 15:43:59,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:59,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021730925] [2024-06-04 15:43:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:59,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:00,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:00,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021730925] [2024-06-04 15:44:00,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021730925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:00,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:00,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:44:00,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819545085] [2024-06-04 15:44:00,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:00,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:44:00,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:44:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:44:00,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:00,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 336 transitions, 5751 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) [2024-06-04 15:44:00,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:00,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:00,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:01,845 INFO L124 PetriNetUnfolderBase]: 5156/8133 cut-off events. [2024-06-04 15:44:01,845 INFO L125 PetriNetUnfolderBase]: For 214233/214243 co-relation queries the response was YES. [2024-06-04 15:44:01,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54960 conditions, 8133 events. 5156/8133 cut-off events. For 214233/214243 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 52215 event pairs, 1721 based on Foata normal form. 19/8151 useless extension candidates. Maximal degree in co-relation 54863. Up to 6925 conditions per place. [2024-06-04 15:44:01,920 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 278 selfloop transitions, 112 changer transitions 0/393 dead transitions. [2024-06-04 15:44:01,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 393 transitions, 7086 flow [2024-06-04 15:44:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:01,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-04 15:44:01,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-04 15:44:01,922 INFO L175 Difference]: Start difference. First operand has 190 places, 336 transitions, 5751 flow. Second operand 9 states and 176 transitions. [2024-06-04 15:44:01,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 393 transitions, 7086 flow [2024-06-04 15:44:02,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 393 transitions, 7041 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 15:44:02,302 INFO L231 Difference]: Finished difference. Result has 197 places, 346 transitions, 6105 flow [2024-06-04 15:44:02,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5706, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6105, PETRI_PLACES=197, PETRI_TRANSITIONS=346} [2024-06-04 15:44:02,303 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-04 15:44:02,303 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 346 transitions, 6105 flow [2024-06-04 15:44:02,303 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) [2024-06-04 15:44:02,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:02,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:02,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 15:44:02,304 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)] === [2024-06-04 15:44:02,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:02,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2126461260, now seen corresponding path program 1 times [2024-06-04 15:44:02,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:02,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896525071] [2024-06-04 15:44:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:02,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:02,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:02,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896525071] [2024-06-04 15:44:02,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896525071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:02,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:02,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:44:02,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572300686] [2024-06-04 15:44:02,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:02,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:44:02,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:02,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:44:02,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:44:02,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:02,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 346 transitions, 6105 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:02,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:02,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:02,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:04,192 INFO L124 PetriNetUnfolderBase]: 5264/8292 cut-off events. [2024-06-04 15:44:04,193 INFO L125 PetriNetUnfolderBase]: For 244409/244438 co-relation queries the response was YES. [2024-06-04 15:44:04,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58721 conditions, 8292 events. 5264/8292 cut-off events. For 244409/244438 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 53311 event pairs, 1810 based on Foata normal form. 38/8329 useless extension candidates. Maximal degree in co-relation 58622. Up to 7246 conditions per place. [2024-06-04 15:44:04,283 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 292 selfloop transitions, 91 changer transitions 0/386 dead transitions. [2024-06-04 15:44:04,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 386 transitions, 7359 flow [2024-06-04 15:44:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:44:04,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:44:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-04 15:44:04,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-04 15:44:04,285 INFO L175 Difference]: Start difference. First operand has 197 places, 346 transitions, 6105 flow. Second operand 7 states and 133 transitions. [2024-06-04 15:44:04,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 386 transitions, 7359 flow [2024-06-04 15:44:04,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 386 transitions, 7234 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 15:44:04,861 INFO L231 Difference]: Finished difference. Result has 201 places, 355 transitions, 6401 flow [2024-06-04 15:44:04,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5982, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6401, PETRI_PLACES=201, PETRI_TRANSITIONS=355} [2024-06-04 15:44:04,862 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-04 15:44:04,862 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 355 transitions, 6401 flow [2024-06-04 15:44:04,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:04,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:04,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:04,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 15:44:04,863 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)] === [2024-06-04 15:44:04,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:04,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1465988864, now seen corresponding path program 2 times [2024-06-04 15:44:04,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:04,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60021970] [2024-06-04 15:44:04,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:04,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:05,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:05,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60021970] [2024-06-04 15:44:05,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60021970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:05,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:05,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:44:05,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145141694] [2024-06-04 15:44:05,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:05,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:44:05,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:05,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:44:05,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:44:05,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:05,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 355 transitions, 6401 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:05,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:05,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:05,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:06,945 INFO L124 PetriNetUnfolderBase]: 5384/8469 cut-off events. [2024-06-04 15:44:06,945 INFO L125 PetriNetUnfolderBase]: For 256203/256205 co-relation queries the response was YES. [2024-06-04 15:44:07,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60712 conditions, 8469 events. 5384/8469 cut-off events. For 256203/256205 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 54369 event pairs, 2246 based on Foata normal form. 14/8482 useless extension candidates. Maximal degree in co-relation 60610. Up to 8195 conditions per place. [2024-06-04 15:44:07,050 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 360 selfloop transitions, 28 changer transitions 0/391 dead transitions. [2024-06-04 15:44:07,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 391 transitions, 7471 flow [2024-06-04 15:44:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-04 15:44:07,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 15:44:07,052 INFO L175 Difference]: Start difference. First operand has 201 places, 355 transitions, 6401 flow. Second operand 9 states and 144 transitions. [2024-06-04 15:44:07,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 391 transitions, 7471 flow [2024-06-04 15:44:07,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 391 transitions, 7328 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-04 15:44:07,692 INFO L231 Difference]: Finished difference. Result has 210 places, 367 transitions, 6545 flow [2024-06-04 15:44:07,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6265, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6545, PETRI_PLACES=210, PETRI_TRANSITIONS=367} [2024-06-04 15:44:07,693 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-04 15:44:07,693 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 367 transitions, 6545 flow [2024-06-04 15:44:07,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:07,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:07,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:07,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 15:44:07,694 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)] === [2024-06-04 15:44:07,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:07,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1465984896, now seen corresponding path program 2 times [2024-06-04 15:44:07,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:07,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949160760] [2024-06-04 15:44:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:07,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:08,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:08,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949160760] [2024-06-04 15:44:08,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949160760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:08,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:08,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:44:08,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7877968] [2024-06-04 15:44:08,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:08,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:44:08,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:08,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:44:08,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:44:08,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:08,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 367 transitions, 6545 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) [2024-06-04 15:44:08,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:08,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:08,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:09,988 INFO L124 PetriNetUnfolderBase]: 5441/8531 cut-off events. [2024-06-04 15:44:09,988 INFO L125 PetriNetUnfolderBase]: For 260125/260133 co-relation queries the response was YES. [2024-06-04 15:44:10,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60847 conditions, 8531 events. 5441/8531 cut-off events. For 260125/260133 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 54560 event pairs, 1972 based on Foata normal form. 17/8547 useless extension candidates. Maximal degree in co-relation 60741. Up to 8054 conditions per place. [2024-06-04 15:44:10,109 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 354 selfloop transitions, 46 changer transitions 0/403 dead transitions. [2024-06-04 15:44:10,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 403 transitions, 7638 flow [2024-06-04 15:44:10,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 15:44:10,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-04 15:44:10,111 INFO L175 Difference]: Start difference. First operand has 210 places, 367 transitions, 6545 flow. Second operand 9 states and 154 transitions. [2024-06-04 15:44:10,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 403 transitions, 7638 flow [2024-06-04 15:44:10,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 403 transitions, 7576 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 15:44:10,818 INFO L231 Difference]: Finished difference. Result has 215 places, 372 transitions, 6653 flow [2024-06-04 15:44:10,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6483, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6653, PETRI_PLACES=215, PETRI_TRANSITIONS=372} [2024-06-04 15:44:10,820 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-04 15:44:10,820 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 372 transitions, 6653 flow [2024-06-04 15:44:10,820 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) [2024-06-04 15:44:10,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:10,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:10,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 15:44:10,821 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)] === [2024-06-04 15:44:10,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:10,821 INFO L85 PathProgramCache]: Analyzing trace with hash 449111854, now seen corresponding path program 3 times [2024-06-04 15:44:10,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:10,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996048637] [2024-06-04 15:44:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:10,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:11,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:11,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996048637] [2024-06-04 15:44:11,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996048637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:11,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:11,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:44:11,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171029368] [2024-06-04 15:44:11,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:11,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:44:11,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:11,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:44:11,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:44:11,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:11,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 372 transitions, 6653 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:11,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:11,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:11,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:13,018 INFO L124 PetriNetUnfolderBase]: 5471/8576 cut-off events. [2024-06-04 15:44:13,018 INFO L125 PetriNetUnfolderBase]: For 269938/269938 co-relation queries the response was YES. [2024-06-04 15:44:13,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61562 conditions, 8576 events. 5471/8576 cut-off events. For 269938/269938 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 54855 event pairs, 2397 based on Foata normal form. 6/8581 useless extension candidates. Maximal degree in co-relation 61456. Up to 8306 conditions per place. [2024-06-04 15:44:13,118 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 363 selfloop transitions, 33 changer transitions 0/399 dead transitions. [2024-06-04 15:44:13,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 399 transitions, 7710 flow [2024-06-04 15:44:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:44:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:44:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-04 15:44:13,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-04 15:44:13,119 INFO L175 Difference]: Start difference. First operand has 215 places, 372 transitions, 6653 flow. Second operand 7 states and 121 transitions. [2024-06-04 15:44:13,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 399 transitions, 7710 flow [2024-06-04 15:44:13,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 399 transitions, 7605 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 15:44:13,683 INFO L231 Difference]: Finished difference. Result has 216 places, 375 transitions, 6687 flow [2024-06-04 15:44:13,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6548, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6687, PETRI_PLACES=216, PETRI_TRANSITIONS=375} [2024-06-04 15:44:13,684 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-04 15:44:13,684 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 375 transitions, 6687 flow [2024-06-04 15:44:13,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:13,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:13,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:13,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 15:44:13,685 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)] === [2024-06-04 15:44:13,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:13,685 INFO L85 PathProgramCache]: Analyzing trace with hash 747352856, now seen corresponding path program 4 times [2024-06-04 15:44:13,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:13,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562688304] [2024-06-04 15:44:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:13,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:14,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:14,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562688304] [2024-06-04 15:44:14,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562688304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:14,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:14,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:44:14,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586039949] [2024-06-04 15:44:14,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:14,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:44:14,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:14,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:44:14,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:44:14,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:14,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 375 transitions, 6687 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:14,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:14,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:14,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:15,788 INFO L124 PetriNetUnfolderBase]: 5453/8550 cut-off events. [2024-06-04 15:44:15,789 INFO L125 PetriNetUnfolderBase]: For 272017/272017 co-relation queries the response was YES. [2024-06-04 15:44:15,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61062 conditions, 8550 events. 5453/8550 cut-off events. For 272017/272017 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 54638 event pairs, 2394 based on Foata normal form. 6/8555 useless extension candidates. Maximal degree in co-relation 60955. Up to 8387 conditions per place. [2024-06-04 15:44:15,880 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 367 selfloop transitions, 20 changer transitions 0/390 dead transitions. [2024-06-04 15:44:15,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 390 transitions, 7519 flow [2024-06-04 15:44:15,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:44:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:44:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-04 15:44:15,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-04 15:44:15,882 INFO L175 Difference]: Start difference. First operand has 216 places, 375 transitions, 6687 flow. Second operand 7 states and 113 transitions. [2024-06-04 15:44:15,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 390 transitions, 7519 flow [2024-06-04 15:44:16,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 390 transitions, 7177 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-04 15:44:16,484 INFO L231 Difference]: Finished difference. Result has 215 places, 375 transitions, 6391 flow [2024-06-04 15:44:16,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6345, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6391, PETRI_PLACES=215, PETRI_TRANSITIONS=375} [2024-06-04 15:44:16,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-04 15:44:16,485 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 375 transitions, 6391 flow [2024-06-04 15:44:16,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:16,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:16,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:16,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 15:44:16,486 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)] === [2024-06-04 15:44:16,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:16,486 INFO L85 PathProgramCache]: Analyzing trace with hash -827635410, now seen corresponding path program 5 times [2024-06-04 15:44:16,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:16,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887278033] [2024-06-04 15:44:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:16,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:17,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:17,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887278033] [2024-06-04 15:44:17,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887278033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:17,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:17,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:44:17,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533224449] [2024-06-04 15:44:17,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:17,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:44:17,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:17,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:44:17,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:44:17,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:17,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 375 transitions, 6391 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:17,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:17,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:17,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:18,696 INFO L124 PetriNetUnfolderBase]: 5417/8512 cut-off events. [2024-06-04 15:44:18,696 INFO L125 PetriNetUnfolderBase]: For 262327/262354 co-relation queries the response was YES. [2024-06-04 15:44:18,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59536 conditions, 8512 events. 5417/8512 cut-off events. For 262327/262354 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 54620 event pairs, 1919 based on Foata normal form. 36/8547 useless extension candidates. Maximal degree in co-relation 59430. Up to 7919 conditions per place. [2024-06-04 15:44:18,784 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 325 selfloop transitions, 77 changer transitions 0/405 dead transitions. [2024-06-04 15:44:18,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 405 transitions, 7424 flow [2024-06-04 15:44:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:44:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:44:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-04 15:44:18,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-04 15:44:18,786 INFO L175 Difference]: Start difference. First operand has 215 places, 375 transitions, 6391 flow. Second operand 7 states and 131 transitions. [2024-06-04 15:44:18,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 405 transitions, 7424 flow [2024-06-04 15:44:19,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 405 transitions, 7330 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 15:44:19,431 INFO L231 Difference]: Finished difference. Result has 216 places, 375 transitions, 6485 flow [2024-06-04 15:44:19,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6297, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6485, PETRI_PLACES=216, PETRI_TRANSITIONS=375} [2024-06-04 15:44:19,432 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-04 15:44:19,432 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 375 transitions, 6485 flow [2024-06-04 15:44:19,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:19,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:19,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:19,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 15:44:19,433 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)] === [2024-06-04 15:44:19,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:19,433 INFO L85 PathProgramCache]: Analyzing trace with hash -821921490, now seen corresponding path program 6 times [2024-06-04 15:44:19,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:19,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125330396] [2024-06-04 15:44:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:19,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:20,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:20,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125330396] [2024-06-04 15:44:20,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125330396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:20,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:20,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:44:20,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885701528] [2024-06-04 15:44:20,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:20,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:44:20,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:20,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:44:20,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:44:20,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:20,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 375 transitions, 6485 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:20,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:20,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:20,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:21,475 INFO L124 PetriNetUnfolderBase]: 5387/8462 cut-off events. [2024-06-04 15:44:21,475 INFO L125 PetriNetUnfolderBase]: For 261764/261764 co-relation queries the response was YES. [2024-06-04 15:44:21,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59501 conditions, 8462 events. 5387/8462 cut-off events. For 261764/261764 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 54140 event pairs, 2360 based on Foata normal form. 6/8467 useless extension candidates. Maximal degree in co-relation 59395. Up to 8273 conditions per place. [2024-06-04 15:44:21,575 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 366 selfloop transitions, 25 changer transitions 0/394 dead transitions. [2024-06-04 15:44:21,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 394 transitions, 7360 flow [2024-06-04 15:44:21,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:44:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:44:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 15:44:21,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-04 15:44:21,577 INFO L175 Difference]: Start difference. First operand has 216 places, 375 transitions, 6485 flow. Second operand 6 states and 105 transitions. [2024-06-04 15:44:21,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 394 transitions, 7360 flow [2024-06-04 15:44:22,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 394 transitions, 7208 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 15:44:22,371 INFO L231 Difference]: Finished difference. Result has 217 places, 375 transitions, 6398 flow [2024-06-04 15:44:22,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6333, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6398, PETRI_PLACES=217, PETRI_TRANSITIONS=375} [2024-06-04 15:44:22,372 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-04 15:44:22,372 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 375 transitions, 6398 flow [2024-06-04 15:44:22,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:22,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:22,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:22,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 15:44:22,372 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)] === [2024-06-04 15:44:22,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:22,373 INFO L85 PathProgramCache]: Analyzing trace with hash -107292998, now seen corresponding path program 3 times [2024-06-04 15:44:22,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:22,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317400014] [2024-06-04 15:44:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:22,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:23,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:23,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317400014] [2024-06-04 15:44:23,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317400014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:23,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:23,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:44:23,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228079065] [2024-06-04 15:44:23,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:23,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:44:23,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:23,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:44:23,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:44:23,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:23,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 375 transitions, 6398 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) [2024-06-04 15:44:23,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:23,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:23,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:24,575 INFO L124 PetriNetUnfolderBase]: 5408/8492 cut-off events. [2024-06-04 15:44:24,575 INFO L125 PetriNetUnfolderBase]: For 255177/255185 co-relation queries the response was YES. [2024-06-04 15:44:24,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58972 conditions, 8492 events. 5408/8492 cut-off events. For 255177/255185 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 54462 event pairs, 1826 based on Foata normal form. 17/8508 useless extension candidates. Maximal degree in co-relation 58866. Up to 7787 conditions per place. [2024-06-04 15:44:24,675 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 314 selfloop transitions, 103 changer transitions 0/420 dead transitions. [2024-06-04 15:44:24,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 420 transitions, 7477 flow [2024-06-04 15:44:24,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:44:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:44:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 15:44:24,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-04 15:44:24,677 INFO L175 Difference]: Start difference. First operand has 217 places, 375 transitions, 6398 flow. Second operand 8 states and 156 transitions. [2024-06-04 15:44:24,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 420 transitions, 7477 flow [2024-06-04 15:44:25,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 420 transitions, 7324 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 15:44:25,310 INFO L231 Difference]: Finished difference. Result has 218 places, 379 transitions, 6541 flow [2024-06-04 15:44:25,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6541, PETRI_PLACES=218, PETRI_TRANSITIONS=379} [2024-06-04 15:44:25,311 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-04 15:44:25,311 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 379 transitions, 6541 flow [2024-06-04 15:44:25,311 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) [2024-06-04 15:44:25,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:25,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:25,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 15:44:25,312 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)] === [2024-06-04 15:44:25,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:25,312 INFO L85 PathProgramCache]: Analyzing trace with hash -815664388, now seen corresponding path program 1 times [2024-06-04 15:44:25,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:25,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139253059] [2024-06-04 15:44:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:25,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:25,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:25,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139253059] [2024-06-04 15:44:25,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139253059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:25,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:25,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:44:25,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504407667] [2024-06-04 15:44:25,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:25,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:44:25,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:25,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:44:25,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:44:26,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:26,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 379 transitions, 6541 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) [2024-06-04 15:44:26,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:26,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:26,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:27,633 INFO L124 PetriNetUnfolderBase]: 5494/8603 cut-off events. [2024-06-04 15:44:27,634 INFO L125 PetriNetUnfolderBase]: For 266004/266012 co-relation queries the response was YES. [2024-06-04 15:44:27,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60843 conditions, 8603 events. 5494/8603 cut-off events. For 266004/266012 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 55042 event pairs, 1852 based on Foata normal form. 14/8616 useless extension candidates. Maximal degree in co-relation 60736. Up to 7941 conditions per place. [2024-06-04 15:44:27,729 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 330 selfloop transitions, 92 changer transitions 0/425 dead transitions. [2024-06-04 15:44:27,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 425 transitions, 7810 flow [2024-06-04 15:44:27,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:44:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:44:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-04 15:44:27,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-06-04 15:44:27,731 INFO L175 Difference]: Start difference. First operand has 218 places, 379 transitions, 6541 flow. Second operand 7 states and 138 transitions. [2024-06-04 15:44:27,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 425 transitions, 7810 flow [2024-06-04 15:44:28,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 425 transitions, 7604 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 15:44:28,492 INFO L231 Difference]: Finished difference. Result has 221 places, 390 transitions, 6813 flow [2024-06-04 15:44:28,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6335, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6813, PETRI_PLACES=221, PETRI_TRANSITIONS=390} [2024-06-04 15:44:28,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-04 15:44:28,492 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 390 transitions, 6813 flow [2024-06-04 15:44:28,493 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) [2024-06-04 15:44:28,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:28,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:28,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 15:44:28,493 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)] === [2024-06-04 15:44:28,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:28,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1355535924, now seen corresponding path program 7 times [2024-06-04 15:44:28,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:28,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312533375] [2024-06-04 15:44:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:28,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:29,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:29,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312533375] [2024-06-04 15:44:29,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312533375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:29,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:29,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:44:29,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915246917] [2024-06-04 15:44:29,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:29,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:44:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:44:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:44:29,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:29,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 390 transitions, 6813 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:29,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:29,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:29,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:30,761 INFO L124 PetriNetUnfolderBase]: 5554/8703 cut-off events. [2024-06-04 15:44:30,761 INFO L125 PetriNetUnfolderBase]: For 281527/281527 co-relation queries the response was YES. [2024-06-04 15:44:30,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62440 conditions, 8703 events. 5554/8703 cut-off events. For 281527/281527 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 55853 event pairs, 2169 based on Foata normal form. 12/8714 useless extension candidates. Maximal degree in co-relation 62330. Up to 8328 conditions per place. [2024-06-04 15:44:30,838 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 388 selfloop transitions, 46 changer transitions 0/437 dead transitions. [2024-06-04 15:44:30,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 437 transitions, 8069 flow [2024-06-04 15:44:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:30,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 15:44:30,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-04 15:44:30,839 INFO L175 Difference]: Start difference. First operand has 221 places, 390 transitions, 6813 flow. Second operand 9 states and 151 transitions. [2024-06-04 15:44:30,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 437 transitions, 8069 flow [2024-06-04 15:44:31,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 437 transitions, 7978 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-04 15:44:31,492 INFO L231 Difference]: Finished difference. Result has 231 places, 410 transitions, 7167 flow [2024-06-04 15:44:31,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6722, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7167, PETRI_PLACES=231, PETRI_TRANSITIONS=410} [2024-06-04 15:44:31,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-04 15:44:31,493 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 410 transitions, 7167 flow [2024-06-04 15:44:31,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:31,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:31,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:31,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 15:44:31,494 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)] === [2024-06-04 15:44:31,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:31,494 INFO L85 PathProgramCache]: Analyzing trace with hash 744503832, now seen corresponding path program 1 times [2024-06-04 15:44:31,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:31,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477178145] [2024-06-04 15:44:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:31,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:32,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:32,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477178145] [2024-06-04 15:44:32,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477178145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:32,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:32,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:44:32,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280942661] [2024-06-04 15:44:32,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:32,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:44:32,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:32,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:44:32,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:44:32,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:32,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 410 transitions, 7167 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) [2024-06-04 15:44:32,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:32,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:32,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:34,083 INFO L124 PetriNetUnfolderBase]: 5636/8820 cut-off events. [2024-06-04 15:44:34,083 INFO L125 PetriNetUnfolderBase]: For 290740/290740 co-relation queries the response was YES. [2024-06-04 15:44:34,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63770 conditions, 8820 events. 5636/8820 cut-off events. For 290740/290740 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 56389 event pairs, 2354 based on Foata normal form. 10/8829 useless extension candidates. Maximal degree in co-relation 63655. Up to 8457 conditions per place. [2024-06-04 15:44:34,191 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 414 selfloop transitions, 27 changer transitions 0/444 dead transitions. [2024-06-04 15:44:34,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 444 transitions, 8347 flow [2024-06-04 15:44:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:44:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:44:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-04 15:44:34,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-04 15:44:34,192 INFO L175 Difference]: Start difference. First operand has 231 places, 410 transitions, 7167 flow. Second operand 7 states and 128 transitions. [2024-06-04 15:44:34,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 444 transitions, 8347 flow [2024-06-04 15:44:35,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 444 transitions, 8218 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 15:44:35,067 INFO L231 Difference]: Finished difference. Result has 231 places, 412 transitions, 7126 flow [2024-06-04 15:44:35,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7038, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7126, PETRI_PLACES=231, PETRI_TRANSITIONS=412} [2024-06-04 15:44:35,068 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-04 15:44:35,068 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 412 transitions, 7126 flow [2024-06-04 15:44:35,068 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) [2024-06-04 15:44:35,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:35,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:35,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 15:44:35,068 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)] === [2024-06-04 15:44:35,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:35,069 INFO L85 PathProgramCache]: Analyzing trace with hash 744564282, now seen corresponding path program 2 times [2024-06-04 15:44:35,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:35,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14024519] [2024-06-04 15:44:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:35,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:35,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:35,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14024519] [2024-06-04 15:44:35,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14024519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:35,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:35,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:44:35,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215280168] [2024-06-04 15:44:35,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:35,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:44:35,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:35,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:44:35,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:44:35,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:35,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 412 transitions, 7126 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) [2024-06-04 15:44:35,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:35,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:35,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:37,612 INFO L124 PetriNetUnfolderBase]: 5688/8900 cut-off events. [2024-06-04 15:44:37,613 INFO L125 PetriNetUnfolderBase]: For 302792/302792 co-relation queries the response was YES. [2024-06-04 15:44:37,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64393 conditions, 8900 events. 5688/8900 cut-off events. For 302792/302792 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 57172 event pairs, 2419 based on Foata normal form. 14/8913 useless extension candidates. Maximal degree in co-relation 64276. Up to 8638 conditions per place. [2024-06-04 15:44:37,744 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 409 selfloop transitions, 26 changer transitions 0/438 dead transitions. [2024-06-04 15:44:37,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 438 transitions, 8154 flow [2024-06-04 15:44:37,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:44:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:44:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-04 15:44:37,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-04 15:44:37,749 INFO L175 Difference]: Start difference. First operand has 231 places, 412 transitions, 7126 flow. Second operand 7 states and 123 transitions. [2024-06-04 15:44:37,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 438 transitions, 8154 flow [2024-06-04 15:44:38,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 438 transitions, 8119 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 15:44:38,443 INFO L231 Difference]: Finished difference. Result has 235 places, 413 transitions, 7166 flow [2024-06-04 15:44:38,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7091, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7166, PETRI_PLACES=235, PETRI_TRANSITIONS=413} [2024-06-04 15:44:38,444 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-04 15:44:38,444 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 413 transitions, 7166 flow [2024-06-04 15:44:38,445 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) [2024-06-04 15:44:38,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:38,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:38,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 15:44:38,445 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)] === [2024-06-04 15:44:38,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:38,445 INFO L85 PathProgramCache]: Analyzing trace with hash -665914856, now seen corresponding path program 3 times [2024-06-04 15:44:38,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:38,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87272027] [2024-06-04 15:44:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:38,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:39,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:39,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87272027] [2024-06-04 15:44:39,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87272027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:39,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:39,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:44:39,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055798416] [2024-06-04 15:44:39,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:39,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:44:39,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:39,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:44:39,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:44:39,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:39,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 413 transitions, 7166 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) [2024-06-04 15:44:39,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:39,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:39,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:41,151 INFO L124 PetriNetUnfolderBase]: 5655/8853 cut-off events. [2024-06-04 15:44:41,151 INFO L125 PetriNetUnfolderBase]: For 293988/293988 co-relation queries the response was YES. [2024-06-04 15:44:41,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63714 conditions, 8853 events. 5655/8853 cut-off events. For 293988/293988 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 56752 event pairs, 2371 based on Foata normal form. 14/8866 useless extension candidates. Maximal degree in co-relation 63595. Up to 8597 conditions per place. [2024-06-04 15:44:41,265 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 410 selfloop transitions, 24 changer transitions 0/437 dead transitions. [2024-06-04 15:44:41,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 437 transitions, 8162 flow [2024-06-04 15:44:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:44:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:44:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-04 15:44:41,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-04 15:44:41,267 INFO L175 Difference]: Start difference. First operand has 235 places, 413 transitions, 7166 flow. Second operand 6 states and 112 transitions. [2024-06-04 15:44:41,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 437 transitions, 8162 flow [2024-06-04 15:44:42,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 437 transitions, 8107 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 15:44:42,069 INFO L231 Difference]: Finished difference. Result has 236 places, 413 transitions, 7168 flow [2024-06-04 15:44:42,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7111, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7168, PETRI_PLACES=236, PETRI_TRANSITIONS=413} [2024-06-04 15:44:42,070 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-04 15:44:42,070 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 413 transitions, 7168 flow [2024-06-04 15:44:42,070 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) [2024-06-04 15:44:42,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:42,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:42,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 15:44:42,071 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)] === [2024-06-04 15:44:42,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:42,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1384992300, now seen corresponding path program 1 times [2024-06-04 15:44:42,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:42,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290142363] [2024-06-04 15:44:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:42,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:42,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:42,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290142363] [2024-06-04 15:44:42,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290142363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:42,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:42,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:44:42,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644542298] [2024-06-04 15:44:42,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:42,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:44:42,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:42,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:44:42,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:44:42,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:42,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 413 transitions, 7168 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) [2024-06-04 15:44:42,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:42,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:42,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:44,365 INFO L124 PetriNetUnfolderBase]: 5637/8827 cut-off events. [2024-06-04 15:44:44,365 INFO L125 PetriNetUnfolderBase]: For 281962/281973 co-relation queries the response was YES. [2024-06-04 15:44:44,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63331 conditions, 8827 events. 5637/8827 cut-off events. For 281962/281973 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 56876 event pairs, 1806 based on Foata normal form. 16/8842 useless extension candidates. Maximal degree in co-relation 63211. Up to 7681 conditions per place. [2024-06-04 15:44:44,487 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 327 selfloop transitions, 119 changer transitions 0/449 dead transitions. [2024-06-04 15:44:44,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 449 transitions, 8355 flow [2024-06-04 15:44:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:44:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:44:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 15:44:44,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-04 15:44:44,488 INFO L175 Difference]: Start difference. First operand has 236 places, 413 transitions, 7168 flow. Second operand 8 states and 150 transitions. [2024-06-04 15:44:44,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 449 transitions, 8355 flow [2024-06-04 15:44:45,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 449 transitions, 8282 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 15:44:45,211 INFO L231 Difference]: Finished difference. Result has 239 places, 413 transitions, 7339 flow [2024-06-04 15:44:45,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7095, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7339, PETRI_PLACES=239, PETRI_TRANSITIONS=413} [2024-06-04 15:44:45,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-04 15:44:45,211 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 413 transitions, 7339 flow [2024-06-04 15:44:45,212 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) [2024-06-04 15:44:45,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:45,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:45,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 15:44:45,212 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)] === [2024-06-04 15:44:45,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:45,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1495790640, now seen corresponding path program 2 times [2024-06-04 15:44:45,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:45,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018290084] [2024-06-04 15:44:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:45,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:45,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:45,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018290084] [2024-06-04 15:44:45,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018290084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:45,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:45,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:44:45,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853452343] [2024-06-04 15:44:45,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:45,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:44:45,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:45,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:44:45,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:44:45,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:45,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 413 transitions, 7339 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) [2024-06-04 15:44:45,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:45,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:45,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:47,632 INFO L124 PetriNetUnfolderBase]: 5667/8882 cut-off events. [2024-06-04 15:44:47,632 INFO L125 PetriNetUnfolderBase]: For 294435/294464 co-relation queries the response was YES. [2024-06-04 15:44:47,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64486 conditions, 8882 events. 5667/8882 cut-off events. For 294435/294464 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 57447 event pairs, 1866 based on Foata normal form. 32/8913 useless extension candidates. Maximal degree in co-relation 64365. Up to 7703 conditions per place. [2024-06-04 15:44:47,731 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 329 selfloop transitions, 118 changer transitions 0/450 dead transitions. [2024-06-04 15:44:47,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 450 transitions, 8588 flow [2024-06-04 15:44:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:44:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:44:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 15:44:47,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-04 15:44:47,732 INFO L175 Difference]: Start difference. First operand has 239 places, 413 transitions, 7339 flow. Second operand 8 states and 147 transitions. [2024-06-04 15:44:47,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 450 transitions, 8588 flow [2024-06-04 15:44:48,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 450 transitions, 8197 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-04 15:44:48,456 INFO L231 Difference]: Finished difference. Result has 238 places, 416 transitions, 7254 flow [2024-06-04 15:44:48,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6954, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7254, PETRI_PLACES=238, PETRI_TRANSITIONS=416} [2024-06-04 15:44:48,457 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-04 15:44:48,457 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 416 transitions, 7254 flow [2024-06-04 15:44:48,457 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) [2024-06-04 15:44:48,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:48,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:48,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 15:44:48,458 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)] === [2024-06-04 15:44:48,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:48,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1816163476, now seen corresponding path program 1 times [2024-06-04 15:44:48,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:48,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692706712] [2024-06-04 15:44:48,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:48,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:49,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:49,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692706712] [2024-06-04 15:44:49,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692706712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:49,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:49,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:44:49,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274875760] [2024-06-04 15:44:49,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:49,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:44:49,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:49,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:44:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:44:49,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:49,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 416 transitions, 7254 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) [2024-06-04 15:44:49,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:49,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:49,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:51,735 INFO L124 PetriNetUnfolderBase]: 6167/9647 cut-off events. [2024-06-04 15:44:51,736 INFO L125 PetriNetUnfolderBase]: For 420409/420428 co-relation queries the response was YES. [2024-06-04 15:44:51,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71970 conditions, 9647 events. 6167/9647 cut-off events. For 420409/420428 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 62026 event pairs, 1616 based on Foata normal form. 30/9676 useless extension candidates. Maximal degree in co-relation 71850. Up to 6008 conditions per place. [2024-06-04 15:44:51,840 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 292 selfloop transitions, 185 changer transitions 0/480 dead transitions. [2024-06-04 15:44:51,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 480 transitions, 8941 flow [2024-06-04 15:44:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-04 15:44:51,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-04 15:44:51,842 INFO L175 Difference]: Start difference. First operand has 238 places, 416 transitions, 7254 flow. Second operand 9 states and 185 transitions. [2024-06-04 15:44:51,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 480 transitions, 8941 flow [2024-06-04 15:44:52,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 480 transitions, 8738 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 15:44:52,929 INFO L231 Difference]: Finished difference. Result has 243 places, 420 transitions, 7588 flow [2024-06-04 15:44:52,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7051, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7588, PETRI_PLACES=243, PETRI_TRANSITIONS=420} [2024-06-04 15:44:52,930 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-04 15:44:52,930 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 420 transitions, 7588 flow [2024-06-04 15:44:52,930 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) [2024-06-04 15:44:52,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:52,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:52,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 15:44:52,930 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)] === [2024-06-04 15:44:52,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:52,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1377580014, now seen corresponding path program 2 times [2024-06-04 15:44:52,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:52,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829134465] [2024-06-04 15:44:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:52,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:53,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:53,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829134465] [2024-06-04 15:44:53,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829134465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:53,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:53,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:44:53,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68464931] [2024-06-04 15:44:53,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:53,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:44:53,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:44:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:44:53,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:53,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 420 transitions, 7588 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) [2024-06-04 15:44:53,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:53,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:53,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:56,176 INFO L124 PetriNetUnfolderBase]: 6447/10090 cut-off events. [2024-06-04 15:44:56,177 INFO L125 PetriNetUnfolderBase]: For 539828/539839 co-relation queries the response was YES. [2024-06-04 15:44:56,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76046 conditions, 10090 events. 6447/10090 cut-off events. For 539828/539839 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 65195 event pairs, 2041 based on Foata normal form. 92/10181 useless extension candidates. Maximal degree in co-relation 75924. Up to 8142 conditions per place. [2024-06-04 15:44:56,303 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 311 selfloop transitions, 163 changer transitions 0/477 dead transitions. [2024-06-04 15:44:56,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 477 transitions, 9109 flow [2024-06-04 15:44:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:44:56,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:44:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-04 15:44:56,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-04 15:44:56,305 INFO L175 Difference]: Start difference. First operand has 243 places, 420 transitions, 7588 flow. Second operand 10 states and 195 transitions. [2024-06-04 15:44:56,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 477 transitions, 9109 flow [2024-06-04 15:44:57,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 477 transitions, 8876 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 15:44:57,535 INFO L231 Difference]: Finished difference. Result has 248 places, 422 transitions, 7732 flow [2024-06-04 15:44:57,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7361, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7732, PETRI_PLACES=248, PETRI_TRANSITIONS=422} [2024-06-04 15:44:57,536 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-04 15:44:57,536 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 422 transitions, 7732 flow [2024-06-04 15:44:57,536 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) [2024-06-04 15:44:57,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:57,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:57,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 15:44:57,537 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)] === [2024-06-04 15:44:57,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:57,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1377580293, now seen corresponding path program 1 times [2024-06-04 15:44:57,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:57,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328903590] [2024-06-04 15:44:57,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:57,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:58,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:58,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328903590] [2024-06-04 15:44:58,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328903590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:58,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:58,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:44:58,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162794314] [2024-06-04 15:44:58,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:58,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:44:58,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:58,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:44:58,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:44:58,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:44:58,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 422 transitions, 7732 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) [2024-06-04 15:44:58,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:58,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:44:58,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:00,784 INFO L124 PetriNetUnfolderBase]: 6544/10219 cut-off events. [2024-06-04 15:45:00,784 INFO L125 PetriNetUnfolderBase]: For 457691/457711 co-relation queries the response was YES. [2024-06-04 15:45:00,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77985 conditions, 10219 events. 6544/10219 cut-off events. For 457691/457711 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 66201 event pairs, 1762 based on Foata normal form. 22/10240 useless extension candidates. Maximal degree in co-relation 77861. Up to 8300 conditions per place. [2024-06-04 15:45:00,890 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 290 selfloop transitions, 201 changer transitions 0/494 dead transitions. [2024-06-04 15:45:00,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 494 transitions, 9759 flow [2024-06-04 15:45:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:45:00,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:45:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-04 15:45:00,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-04 15:45:00,892 INFO L175 Difference]: Start difference. First operand has 248 places, 422 transitions, 7732 flow. Second operand 9 states and 177 transitions. [2024-06-04 15:45:00,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 494 transitions, 9759 flow [2024-06-04 15:45:02,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 494 transitions, 9426 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 15:45:02,007 INFO L231 Difference]: Finished difference. Result has 252 places, 443 transitions, 8340 flow [2024-06-04 15:45:02,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7405, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8340, PETRI_PLACES=252, PETRI_TRANSITIONS=443} [2024-06-04 15:45:02,008 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-04 15:45:02,008 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 443 transitions, 8340 flow [2024-06-04 15:45:02,008 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) [2024-06-04 15:45:02,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:02,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:02,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 15:45:02,009 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)] === [2024-06-04 15:45:02,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:02,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1384989603, now seen corresponding path program 2 times [2024-06-04 15:45:02,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:02,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231634967] [2024-06-04 15:45:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:02,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:02,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:02,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231634967] [2024-06-04 15:45:02,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231634967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:02,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:02,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:45:02,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048495999] [2024-06-04 15:45:02,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:02,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:45:02,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:02,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:45:02,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:45:02,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:45:02,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 443 transitions, 8340 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) [2024-06-04 15:45:02,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:02,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:45:02,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:05,126 INFO L124 PetriNetUnfolderBase]: 6626/10337 cut-off events. [2024-06-04 15:45:05,126 INFO L125 PetriNetUnfolderBase]: For 490220/490232 co-relation queries the response was YES. [2024-06-04 15:45:05,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81988 conditions, 10337 events. 6626/10337 cut-off events. For 490220/490232 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 66911 event pairs, 1968 based on Foata normal form. 16/10352 useless extension candidates. Maximal degree in co-relation 81860. Up to 8800 conditions per place. [2024-06-04 15:45:05,293 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 329 selfloop transitions, 168 changer transitions 0/500 dead transitions. [2024-06-04 15:45:05,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 500 transitions, 10250 flow [2024-06-04 15:45:05,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:45:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:45:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-04 15:45:05,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-04 15:45:05,295 INFO L175 Difference]: Start difference. First operand has 252 places, 443 transitions, 8340 flow. Second operand 9 states and 172 transitions. [2024-06-04 15:45:05,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 500 transitions, 10250 flow [2024-06-04 15:45:06,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 500 transitions, 10087 flow, removed 71 selfloop flow, removed 2 redundant places. [2024-06-04 15:45:06,600 INFO L231 Difference]: Finished difference. Result has 260 places, 454 transitions, 8751 flow [2024-06-04 15:45:06,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8211, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8751, PETRI_PLACES=260, PETRI_TRANSITIONS=454} [2024-06-04 15:45:06,601 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-04 15:45:06,601 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 454 transitions, 8751 flow [2024-06-04 15:45:06,601 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) [2024-06-04 15:45:06,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:06,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:06,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 15:45:06,602 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)] === [2024-06-04 15:45:06,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:06,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1643615907, now seen corresponding path program 1 times [2024-06-04 15:45:06,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:06,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170886918] [2024-06-04 15:45:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:06,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:07,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:07,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170886918] [2024-06-04 15:45:07,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170886918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:07,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:07,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:45:07,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802568638] [2024-06-04 15:45:07,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:07,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:45:07,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:45:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:45:07,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:45:07,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 454 transitions, 8751 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) [2024-06-04 15:45:07,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:07,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:45:07,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:09,810 INFO L124 PetriNetUnfolderBase]: 6634/10353 cut-off events. [2024-06-04 15:45:09,810 INFO L125 PetriNetUnfolderBase]: For 506605/506605 co-relation queries the response was YES. [2024-06-04 15:45:09,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83287 conditions, 10353 events. 6634/10353 cut-off events. For 506605/506605 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 67019 event pairs, 2539 based on Foata normal form. 2/10354 useless extension candidates. Maximal degree in co-relation 83156. Up to 10150 conditions per place. [2024-06-04 15:45:09,966 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 435 selfloop transitions, 42 changer transitions 0/480 dead transitions. [2024-06-04 15:45:09,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 480 transitions, 9892 flow [2024-06-04 15:45:09,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:45:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:45:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:45:09,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 15:45:09,968 INFO L175 Difference]: Start difference. First operand has 260 places, 454 transitions, 8751 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:45:09,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 480 transitions, 9892 flow [2024-06-04 15:45:11,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 480 transitions, 9717 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-04 15:45:11,354 INFO L231 Difference]: Finished difference. Result has 266 places, 462 transitions, 8821 flow [2024-06-04 15:45:11,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8578, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8821, PETRI_PLACES=266, PETRI_TRANSITIONS=462} [2024-06-04 15:45:11,355 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-04 15:45:11,355 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 462 transitions, 8821 flow [2024-06-04 15:45:11,355 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) [2024-06-04 15:45:11,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:11,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:11,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 15:45:11,356 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)] === [2024-06-04 15:45:11,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:11,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1799107398, now seen corresponding path program 3 times [2024-06-04 15:45:11,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:11,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529612354] [2024-06-04 15:45:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:11,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:12,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:12,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529612354] [2024-06-04 15:45:12,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529612354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:12,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:12,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:45:12,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123647259] [2024-06-04 15:45:12,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:12,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:45:12,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:12,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:45:12,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:45:12,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:45:12,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 462 transitions, 8821 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) [2024-06-04 15:45:12,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:12,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:45:12,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:14,949 INFO L124 PetriNetUnfolderBase]: 6914/10797 cut-off events. [2024-06-04 15:45:14,949 INFO L125 PetriNetUnfolderBase]: For 651988/651988 co-relation queries the response was YES. [2024-06-04 15:45:15,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85930 conditions, 10797 events. 6914/10797 cut-off events. For 651988/651988 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 69980 event pairs, 2541 based on Foata normal form. 82/10878 useless extension candidates. Maximal degree in co-relation 85796. Up to 9784 conditions per place. [2024-06-04 15:45:15,107 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 428 selfloop transitions, 69 changer transitions 0/500 dead transitions. [2024-06-04 15:45:15,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 500 transitions, 10077 flow [2024-06-04 15:45:15,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:45:15,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:45:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-04 15:45:15,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-04 15:45:15,109 INFO L175 Difference]: Start difference. First operand has 266 places, 462 transitions, 8821 flow. Second operand 10 states and 173 transitions. [2024-06-04 15:45:15,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 500 transitions, 10077 flow [2024-06-04 15:45:16,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 500 transitions, 9966 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 15:45:16,506 INFO L231 Difference]: Finished difference. Result has 272 places, 464 transitions, 8901 flow [2024-06-04 15:45:16,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8710, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8901, PETRI_PLACES=272, PETRI_TRANSITIONS=464} [2024-06-04 15:45:16,506 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-04 15:45:16,506 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 464 transitions, 8901 flow [2024-06-04 15:45:16,507 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) [2024-06-04 15:45:16,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:16,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:16,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 15:45:16,507 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)] === [2024-06-04 15:45:16,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:16,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1799107119, now seen corresponding path program 3 times [2024-06-04 15:45:16,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:16,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647893569] [2024-06-04 15:45:16,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:16,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:17,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:17,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647893569] [2024-06-04 15:45:17,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647893569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:17,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:17,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:45:17,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565232433] [2024-06-04 15:45:17,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:17,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:45:17,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:17,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:45:17,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:45:17,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:45:17,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 464 transitions, 8901 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) [2024-06-04 15:45:17,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:17,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:45:17,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:19,919 INFO L124 PetriNetUnfolderBase]: 7034/10965 cut-off events. [2024-06-04 15:45:19,919 INFO L125 PetriNetUnfolderBase]: For 550239/550239 co-relation queries the response was YES. [2024-06-04 15:45:20,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87913 conditions, 10965 events. 7034/10965 cut-off events. For 550239/550239 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 71097 event pairs, 2585 based on Foata normal form. 6/10970 useless extension candidates. Maximal degree in co-relation 87778. Up to 10288 conditions per place. [2024-06-04 15:45:20,094 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 424 selfloop transitions, 81 changer transitions 4/512 dead transitions. [2024-06-04 15:45:20,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 512 transitions, 10390 flow [2024-06-04 15:45:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:45:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:45:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-04 15:45:20,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-04 15:45:20,096 INFO L175 Difference]: Start difference. First operand has 272 places, 464 transitions, 8901 flow. Second operand 11 states and 183 transitions. [2024-06-04 15:45:20,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 512 transitions, 10390 flow [2024-06-04 15:45:21,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 512 transitions, 10233 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 15:45:21,602 INFO L231 Difference]: Finished difference. Result has 276 places, 478 transitions, 9219 flow [2024-06-04 15:45:21,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8762, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9219, PETRI_PLACES=276, PETRI_TRANSITIONS=478} [2024-06-04 15:45:21,602 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-04 15:45:21,603 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 478 transitions, 9219 flow [2024-06-04 15:45:21,603 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) [2024-06-04 15:45:21,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:21,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:21,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 15:45:21,603 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)] === [2024-06-04 15:45:21,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash 148300646, now seen corresponding path program 1 times [2024-06-04 15:45:21,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:21,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349109818] [2024-06-04 15:45:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:21,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:22,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:22,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349109818] [2024-06-04 15:45:22,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349109818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:22,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:22,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:45:22,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739157740] [2024-06-04 15:45:22,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:22,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:45:22,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:22,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:45:22,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:45:22,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:45:22,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 478 transitions, 9219 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) [2024-06-04 15:45:22,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:22,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:45:22,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:24,845 INFO L124 PetriNetUnfolderBase]: 7069/11013 cut-off events. [2024-06-04 15:45:24,845 INFO L125 PetriNetUnfolderBase]: For 571256/571256 co-relation queries the response was YES. [2024-06-04 15:45:24,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89105 conditions, 11013 events. 7069/11013 cut-off events. For 571256/571256 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 71477 event pairs, 2791 based on Foata normal form. 3/11015 useless extension candidates. Maximal degree in co-relation 88968. Up to 10621 conditions per place. [2024-06-04 15:45:24,993 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 456 selfloop transitions, 54 changer transitions 0/513 dead transitions. [2024-06-04 15:45:24,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 513 transitions, 10696 flow [2024-06-04 15:45:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:45:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:45:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 15:45:24,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-04 15:45:24,994 INFO L175 Difference]: Start difference. First operand has 276 places, 478 transitions, 9219 flow. Second operand 7 states and 126 transitions. [2024-06-04 15:45:24,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 513 transitions, 10696 flow [2024-06-04 15:45:26,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 513 transitions, 10503 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-04 15:45:26,455 INFO L231 Difference]: Finished difference. Result has 277 places, 484 transitions, 9328 flow [2024-06-04 15:45:26,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9026, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9328, PETRI_PLACES=277, PETRI_TRANSITIONS=484} [2024-06-04 15:45:26,456 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-04 15:45:26,456 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 484 transitions, 9328 flow [2024-06-04 15:45:26,456 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) [2024-06-04 15:45:26,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:26,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:26,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 15:45:26,457 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)] === [2024-06-04 15:45:26,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:26,457 INFO L85 PathProgramCache]: Analyzing trace with hash 158776166, now seen corresponding path program 2 times [2024-06-04 15:45:26,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:26,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262634256] [2024-06-04 15:45:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:26,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:27,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:27,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262634256] [2024-06-04 15:45:27,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262634256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:27,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:27,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:45:27,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364563709] [2024-06-04 15:45:27,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:27,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:45:27,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:45:27,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:45:27,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:45:27,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 484 transitions, 9328 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) [2024-06-04 15:45:27,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:27,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:45:27,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:29,671 INFO L124 PetriNetUnfolderBase]: 7078/11022 cut-off events. [2024-06-04 15:45:29,672 INFO L125 PetriNetUnfolderBase]: For 583224/583224 co-relation queries the response was YES. [2024-06-04 15:45:29,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89189 conditions, 11022 events. 7078/11022 cut-off events. For 583224/583224 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 71484 event pairs, 2835 based on Foata normal form. 5/11026 useless extension candidates. Maximal degree in co-relation 89050. Up to 10775 conditions per place. [2024-06-04 15:45:29,823 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 474 selfloop transitions, 31 changer transitions 0/508 dead transitions. [2024-06-04 15:45:29,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 508 transitions, 10554 flow [2024-06-04 15:45:29,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:45:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:45:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-04 15:45:29,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-04 15:45:29,824 INFO L175 Difference]: Start difference. First operand has 277 places, 484 transitions, 9328 flow. Second operand 7 states and 121 transitions. [2024-06-04 15:45:29,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 508 transitions, 10554 flow [2024-06-04 15:45:31,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 508 transitions, 10220 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-04 15:45:31,261 INFO L231 Difference]: Finished difference. Result has 277 places, 487 transitions, 9150 flow [2024-06-04 15:45:31,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9003, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9150, PETRI_PLACES=277, PETRI_TRANSITIONS=487} [2024-06-04 15:45:31,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-04 15:45:31,262 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 487 transitions, 9150 flow [2024-06-04 15:45:31,262 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) [2024-06-04 15:45:31,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:31,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:31,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 15:45:31,263 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)] === [2024-06-04 15:45:31,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:31,263 INFO L85 PathProgramCache]: Analyzing trace with hash -79510480, now seen corresponding path program 3 times [2024-06-04 15:45:31,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:31,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020086191] [2024-06-04 15:45:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:31,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:31,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:31,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020086191] [2024-06-04 15:45:31,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020086191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:31,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:31,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:45:31,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462207444] [2024-06-04 15:45:31,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:31,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:45:31,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:31,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:45:31,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:45:31,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:45:31,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 487 transitions, 9150 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) [2024-06-04 15:45:31,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:31,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:45:31,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:34,418 INFO L124 PetriNetUnfolderBase]: 7108/11066 cut-off events. [2024-06-04 15:45:34,418 INFO L125 PetriNetUnfolderBase]: For 577094/577094 co-relation queries the response was YES. [2024-06-04 15:45:34,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89259 conditions, 11066 events. 7108/11066 cut-off events. For 577094/577094 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 71865 event pairs, 2866 based on Foata normal form. 6/11071 useless extension candidates. Maximal degree in co-relation 89120. Up to 10790 conditions per place. [2024-06-04 15:45:34,576 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 478 selfloop transitions, 36 changer transitions 0/517 dead transitions. [2024-06-04 15:45:34,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 517 transitions, 10442 flow [2024-06-04 15:45:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:45:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:45:34,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:45:34,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-04 15:45:34,577 INFO L175 Difference]: Start difference. First operand has 277 places, 487 transitions, 9150 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:45:34,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 517 transitions, 10442 flow [2024-06-04 15:45:36,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 517 transitions, 10344 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 15:45:36,167 INFO L231 Difference]: Finished difference. Result has 279 places, 490 transitions, 9213 flow [2024-06-04 15:45:36,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9052, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9213, PETRI_PLACES=279, PETRI_TRANSITIONS=490} [2024-06-04 15:45:36,168 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-04 15:45:36,168 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 490 transitions, 9213 flow [2024-06-04 15:45:36,168 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) [2024-06-04 15:45:36,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:36,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:36,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 15:45:36,168 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)] === [2024-06-04 15:45:36,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash 245230640, now seen corresponding path program 4 times [2024-06-04 15:45:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:36,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735372758] [2024-06-04 15:45:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:36,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:36,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735372758] [2024-06-04 15:45:36,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735372758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:36,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:36,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:45:36,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774424850] [2024-06-04 15:45:36,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:36,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:45:36,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:36,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:45:36,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:45:36,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:45:36,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 490 transitions, 9213 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) [2024-06-04 15:45:36,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:36,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:45:36,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:39,237 INFO L124 PetriNetUnfolderBase]: 7090/11040 cut-off events. [2024-06-04 15:45:39,238 INFO L125 PetriNetUnfolderBase]: For 566074/566074 co-relation queries the response was YES. [2024-06-04 15:45:39,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88595 conditions, 11040 events. 7090/11040 cut-off events. For 566074/566074 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 71680 event pairs, 2866 based on Foata normal form. 6/11045 useless extension candidates. Maximal degree in co-relation 88456. Up to 10845 conditions per place. [2024-06-04 15:45:39,373 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 483 selfloop transitions, 23 changer transitions 0/509 dead transitions. [2024-06-04 15:45:39,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 509 transitions, 10337 flow [2024-06-04 15:45:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:45:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:45:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:45:39,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 15:45:39,375 INFO L175 Difference]: Start difference. First operand has 279 places, 490 transitions, 9213 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:45:39,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 509 transitions, 10337 flow [2024-06-04 15:45:41,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 509 transitions, 10207 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 15:45:41,064 INFO L231 Difference]: Finished difference. Result has 281 places, 490 transitions, 9135 flow [2024-06-04 15:45:41,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9083, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9135, PETRI_PLACES=281, PETRI_TRANSITIONS=490} [2024-06-04 15:45:41,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-04 15:45:41,065 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 490 transitions, 9135 flow [2024-06-04 15:45:41,065 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) [2024-06-04 15:45:41,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:41,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:41,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 15:45:41,065 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)] === [2024-06-04 15:45:41,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:41,066 INFO L85 PathProgramCache]: Analyzing trace with hash 836979619, now seen corresponding path program 1 times [2024-06-04 15:45:41,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:41,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115799455] [2024-06-04 15:45:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:41,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:41,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:41,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115799455] [2024-06-04 15:45:41,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115799455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:41,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:41,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:45:41,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251621091] [2024-06-04 15:45:41,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:41,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:45:41,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:41,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:45:41,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:45:41,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:45:41,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 490 transitions, 9135 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) [2024-06-04 15:45:41,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:41,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:45:41,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:44,217 INFO L124 PetriNetUnfolderBase]: 7078/11026 cut-off events. [2024-06-04 15:45:44,218 INFO L125 PetriNetUnfolderBase]: For 567010/567010 co-relation queries the response was YES. [2024-06-04 15:45:44,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88130 conditions, 11026 events. 7078/11026 cut-off events. For 567010/567010 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 71603 event pairs, 2830 based on Foata normal form. 4/11029 useless extension candidates. Maximal degree in co-relation 87990. Up to 10805 conditions per place. [2024-06-04 15:45:44,349 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 476 selfloop transitions, 32 changer transitions 0/511 dead transitions. [2024-06-04 15:45:44,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 511 transitions, 10266 flow [2024-06-04 15:45:44,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:45:44,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:45:44,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-04 15:45:44,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-04 15:45:44,350 INFO L175 Difference]: Start difference. First operand has 281 places, 490 transitions, 9135 flow. Second operand 6 states and 109 transitions. [2024-06-04 15:45:44,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 511 transitions, 10266 flow [2024-06-04 15:45:45,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 511 transitions, 9997 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-04 15:45:45,800 INFO L231 Difference]: Finished difference. Result has 279 places, 490 transitions, 8949 flow [2024-06-04 15:45:45,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8866, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8949, PETRI_PLACES=279, PETRI_TRANSITIONS=490} [2024-06-04 15:45:45,801 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-04 15:45:45,801 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 490 transitions, 8949 flow [2024-06-04 15:45:45,801 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) [2024-06-04 15:45:45,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:45,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:45,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 15:45:45,802 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)] === [2024-06-04 15:45:45,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash 484212767, now seen corresponding path program 2 times [2024-06-04 15:45:45,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:45,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164506638] [2024-06-04 15:45:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:45,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:46,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:46,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164506638] [2024-06-04 15:45:46,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164506638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:46,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:46,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:45:46,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153955153] [2024-06-04 15:45:46,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:46,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:45:46,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:46,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:45:46,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:45:46,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:45:46,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 490 transitions, 8949 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) [2024-06-04 15:45:46,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:46,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:45:46,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:49,043 INFO L124 PetriNetUnfolderBase]: 7046/10990 cut-off events. [2024-06-04 15:45:49,043 INFO L125 PetriNetUnfolderBase]: For 554505/554532 co-relation queries the response was YES. [2024-06-04 15:45:49,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86565 conditions, 10990 events. 7046/10990 cut-off events. For 554505/554532 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 71551 event pairs, 2352 based on Foata normal form. 32/11021 useless extension candidates. Maximal degree in co-relation 86424. Up to 10315 conditions per place. [2024-06-04 15:45:49,178 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 424 selfloop transitions, 94 changer transitions 0/521 dead transitions. [2024-06-04 15:45:49,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 521 transitions, 10162 flow [2024-06-04 15:45:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:45:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:45:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:45:49,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-04 15:45:49,179 INFO L175 Difference]: Start difference. First operand has 279 places, 490 transitions, 8949 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:45:49,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 521 transitions, 10162 flow [2024-06-04 15:45:50,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 521 transitions, 10022 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 15:45:50,476 INFO L231 Difference]: Finished difference. Result has 280 places, 490 transitions, 9038 flow [2024-06-04 15:45:50,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8809, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9038, PETRI_PLACES=280, PETRI_TRANSITIONS=490} [2024-06-04 15:45:50,477 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-04 15:45:50,477 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 490 transitions, 9038 flow [2024-06-04 15:45:50,477 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) [2024-06-04 15:45:50,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:50,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:50,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 15:45:50,477 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)] === [2024-06-04 15:45:50,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:50,478 INFO L85 PathProgramCache]: Analyzing trace with hash 290475942, now seen corresponding path program 3 times [2024-06-04 15:45:50,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:50,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633496965] [2024-06-04 15:45:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:50,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:51,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:51,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633496965] [2024-06-04 15:45:51,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633496965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:51,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:51,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:45:51,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122185203] [2024-06-04 15:45:51,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:51,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:45:51,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:45:51,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:45:51,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:45:51,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 490 transitions, 9038 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) [2024-06-04 15:45:51,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:51,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:45:51,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:53,827 INFO L124 PetriNetUnfolderBase]: 7037/10972 cut-off events. [2024-06-04 15:45:53,828 INFO L125 PetriNetUnfolderBase]: For 530637/530637 co-relation queries the response was YES. [2024-06-04 15:45:53,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86292 conditions, 10972 events. 7037/10972 cut-off events. For 530637/530637 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 71311 event pairs, 2820 based on Foata normal form. 3/10974 useless extension candidates. Maximal degree in co-relation 86152. Up to 10703 conditions per place. [2024-06-04 15:45:53,963 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 467 selfloop transitions, 43 changer transitions 0/513 dead transitions. [2024-06-04 15:45:53,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 513 transitions, 10205 flow [2024-06-04 15:45:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:45:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:45:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-04 15:45:53,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-04 15:45:53,964 INFO L175 Difference]: Start difference. First operand has 280 places, 490 transitions, 9038 flow. Second operand 6 states and 110 transitions. [2024-06-04 15:45:53,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 513 transitions, 10205 flow [2024-06-04 15:45:55,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 513 transitions, 10014 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 15:45:55,258 INFO L231 Difference]: Finished difference. Result has 280 places, 490 transitions, 8962 flow [2024-06-04 15:45:55,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8847, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8962, PETRI_PLACES=280, PETRI_TRANSITIONS=490} [2024-06-04 15:45:55,261 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-04 15:45:55,261 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 490 transitions, 8962 flow [2024-06-04 15:45:55,261 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) [2024-06-04 15:45:55,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:55,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:55,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 15:45:55,261 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)] === [2024-06-04 15:45:55,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:55,262 INFO L85 PathProgramCache]: Analyzing trace with hash 113322753, now seen corresponding path program 2 times [2024-06-04 15:45:55,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:55,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314258925] [2024-06-04 15:45:55,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:55,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:56,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:56,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314258925] [2024-06-04 15:45:56,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314258925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:56,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:56,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:45:56,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756755776] [2024-06-04 15:45:56,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:56,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:45:56,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:56,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:45:56,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:45:56,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:45:56,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 490 transitions, 8962 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) [2024-06-04 15:45:56,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:56,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:45:56,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:58,666 INFO L124 PetriNetUnfolderBase]: 7045/10989 cut-off events. [2024-06-04 15:45:58,667 INFO L125 PetriNetUnfolderBase]: For 528321/528321 co-relation queries the response was YES. [2024-06-04 15:45:58,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85868 conditions, 10989 events. 7045/10989 cut-off events. For 528321/528321 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 71506 event pairs, 2677 based on Foata normal form. 2/10990 useless extension candidates. Maximal degree in co-relation 85729. Up to 10780 conditions per place. [2024-06-04 15:45:58,805 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 463 selfloop transitions, 42 changer transitions 0/508 dead transitions. [2024-06-04 15:45:58,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 508 transitions, 10062 flow [2024-06-04 15:45:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:45:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:45:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 15:45:58,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-04 15:45:58,807 INFO L175 Difference]: Start difference. First operand has 280 places, 490 transitions, 8962 flow. Second operand 7 states and 114 transitions. [2024-06-04 15:45:58,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 508 transitions, 10062 flow [2024-06-04 15:46:00,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 508 transitions, 9943 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 15:46:00,199 INFO L231 Difference]: Finished difference. Result has 281 places, 492 transitions, 8983 flow [2024-06-04 15:46:00,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8843, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8983, PETRI_PLACES=281, PETRI_TRANSITIONS=492} [2024-06-04 15:46:00,200 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-04 15:46:00,200 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 492 transitions, 8983 flow [2024-06-04 15:46:00,200 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) [2024-06-04 15:46:00,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:00,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:00,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 15:46:00,201 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)] === [2024-06-04 15:46:00,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:00,201 INFO L85 PathProgramCache]: Analyzing trace with hash 497107713, now seen corresponding path program 3 times [2024-06-04 15:46:00,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:00,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179265132] [2024-06-04 15:46:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:00,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:01,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:01,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179265132] [2024-06-04 15:46:01,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179265132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:01,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:01,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:46:01,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142453668] [2024-06-04 15:46:01,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:01,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:46:01,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:01,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:46:01,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:46:01,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:46:01,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 492 transitions, 8983 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) [2024-06-04 15:46:01,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:01,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:46:01,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:03,498 INFO L124 PetriNetUnfolderBase]: 7053/11001 cut-off events. [2024-06-04 15:46:03,498 INFO L125 PetriNetUnfolderBase]: For 528900/528900 co-relation queries the response was YES. [2024-06-04 15:46:03,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85927 conditions, 11001 events. 7053/11001 cut-off events. For 528900/528900 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 71566 event pairs, 2616 based on Foata normal form. 2/11002 useless extension candidates. Maximal degree in co-relation 85788. Up to 10772 conditions per place. [2024-06-04 15:46:03,633 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 461 selfloop transitions, 46 changer transitions 0/510 dead transitions. [2024-06-04 15:46:03,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 510 transitions, 10091 flow [2024-06-04 15:46:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:46:03,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:46:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 15:46:03,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-04 15:46:03,634 INFO L175 Difference]: Start difference. First operand has 281 places, 492 transitions, 8983 flow. Second operand 6 states and 105 transitions. [2024-06-04 15:46:03,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 510 transitions, 10091 flow [2024-06-04 15:46:05,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 510 transitions, 9978 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 15:46:05,090 INFO L231 Difference]: Finished difference. Result has 283 places, 494 transitions, 9025 flow [2024-06-04 15:46:05,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8874, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9025, PETRI_PLACES=283, PETRI_TRANSITIONS=494} [2024-06-04 15:46:05,090 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-04 15:46:05,091 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 494 transitions, 9025 flow [2024-06-04 15:46:05,091 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) [2024-06-04 15:46:05,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:05,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:05,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 15:46:05,091 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)] === [2024-06-04 15:46:05,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:05,092 INFO L85 PathProgramCache]: Analyzing trace with hash 497553183, now seen corresponding path program 4 times [2024-06-04 15:46:05,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:05,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804175384] [2024-06-04 15:46:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:05,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:06,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:06,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804175384] [2024-06-04 15:46:06,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804175384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:06,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:06,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:46:06,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487415342] [2024-06-04 15:46:06,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:06,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:46:06,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:06,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:46:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:46:06,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:46:06,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 494 transitions, 9025 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) [2024-06-04 15:46:06,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:06,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:46:06,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:08,416 INFO L124 PetriNetUnfolderBase]: 7048/10985 cut-off events. [2024-06-04 15:46:08,416 INFO L125 PetriNetUnfolderBase]: For 524847/524847 co-relation queries the response was YES. [2024-06-04 15:46:08,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85709 conditions, 10985 events. 7048/10985 cut-off events. For 524847/524847 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 71340 event pairs, 2844 based on Foata normal form. 2/10986 useless extension candidates. Maximal degree in co-relation 85569. Up to 10839 conditions per place. [2024-06-04 15:46:08,552 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 490 selfloop transitions, 14 changer transitions 0/507 dead transitions. [2024-06-04 15:46:08,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 507 transitions, 10109 flow [2024-06-04 15:46:08,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:46:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:46:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-04 15:46:08,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 15:46:08,554 INFO L175 Difference]: Start difference. First operand has 283 places, 494 transitions, 9025 flow. Second operand 6 states and 96 transitions. [2024-06-04 15:46:08,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 507 transitions, 10109 flow [2024-06-04 15:46:09,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 507 transitions, 9984 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 15:46:09,980 INFO L231 Difference]: Finished difference. Result has 285 places, 496 transitions, 8983 flow [2024-06-04 15:46:09,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8904, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8983, PETRI_PLACES=285, PETRI_TRANSITIONS=496} [2024-06-04 15:46:09,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-04 15:46:09,981 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 496 transitions, 8983 flow [2024-06-04 15:46:09,981 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) [2024-06-04 15:46:09,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:09,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:09,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 15:46:09,982 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)] === [2024-06-04 15:46:09,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:09,982 INFO L85 PathProgramCache]: Analyzing trace with hash 968885719, now seen corresponding path program 4 times [2024-06-04 15:46:09,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:09,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136750430] [2024-06-04 15:46:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:09,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:11,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:11,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136750430] [2024-06-04 15:46:11,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136750430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:11,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:11,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:46:11,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828330877] [2024-06-04 15:46:11,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:11,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:46:11,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:11,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:46:11,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:46:11,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:46:11,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 496 transitions, 8983 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) [2024-06-04 15:46:11,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:11,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:46:11,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:13,580 INFO L124 PetriNetUnfolderBase]: 7108/11075 cut-off events. [2024-06-04 15:46:13,581 INFO L125 PetriNetUnfolderBase]: For 528662/528671 co-relation queries the response was YES. [2024-06-04 15:46:13,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86182 conditions, 11075 events. 7108/11075 cut-off events. For 528662/528671 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 72114 event pairs, 2278 based on Foata normal form. 14/11088 useless extension candidates. Maximal degree in co-relation 86041. Up to 10312 conditions per place. [2024-06-04 15:46:13,738 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 432 selfloop transitions, 115 changer transitions 0/550 dead transitions. [2024-06-04 15:46:13,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 550 transitions, 10467 flow [2024-06-04 15:46:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:46:13,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:46:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-04 15:46:13,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-04 15:46:13,740 INFO L175 Difference]: Start difference. First operand has 285 places, 496 transitions, 8983 flow. Second operand 10 states and 186 transitions. [2024-06-04 15:46:13,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 550 transitions, 10467 flow [2024-06-04 15:46:15,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 550 transitions, 10404 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 15:46:15,357 INFO L231 Difference]: Finished difference. Result has 292 places, 505 transitions, 9369 flow [2024-06-04 15:46:15,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8920, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9369, PETRI_PLACES=292, PETRI_TRANSITIONS=505} [2024-06-04 15:46:15,358 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-04 15:46:15,358 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 505 transitions, 9369 flow [2024-06-04 15:46:15,358 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) [2024-06-04 15:46:15,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:15,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:15,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 15:46:15,358 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)] === [2024-06-04 15:46:15,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:15,359 INFO L85 PathProgramCache]: Analyzing trace with hash 112984140, now seen corresponding path program 4 times [2024-06-04 15:46:15,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:15,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306062183] [2024-06-04 15:46:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:15,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:16,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:16,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306062183] [2024-06-04 15:46:16,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306062183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:16,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:16,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:46:16,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385554528] [2024-06-04 15:46:16,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:16,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:46:16,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:16,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:46:16,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:46:16,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:46:16,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 505 transitions, 9369 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) [2024-06-04 15:46:16,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:16,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:46:16,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:18,769 INFO L124 PetriNetUnfolderBase]: 7303/11393 cut-off events. [2024-06-04 15:46:18,769 INFO L125 PetriNetUnfolderBase]: For 665798/665815 co-relation queries the response was YES. [2024-06-04 15:46:18,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87996 conditions, 11393 events. 7303/11393 cut-off events. For 665798/665815 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 74093 event pairs, 1974 based on Foata normal form. 96/11488 useless extension candidates. Maximal degree in co-relation 87853. Up to 9222 conditions per place. [2024-06-04 15:46:18,918 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 414 selfloop transitions, 141 changer transitions 1/559 dead transitions. [2024-06-04 15:46:18,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 559 transitions, 10801 flow [2024-06-04 15:46:18,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:46:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:46:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-04 15:46:18,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 15:46:18,919 INFO L175 Difference]: Start difference. First operand has 292 places, 505 transitions, 9369 flow. Second operand 9 states and 180 transitions. [2024-06-04 15:46:18,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 559 transitions, 10801 flow [2024-06-04 15:46:20,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 559 transitions, 10494 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-04 15:46:20,473 INFO L231 Difference]: Finished difference. Result has 294 places, 505 transitions, 9398 flow [2024-06-04 15:46:20,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9062, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9398, PETRI_PLACES=294, PETRI_TRANSITIONS=505} [2024-06-04 15:46:20,473 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-04 15:46:20,474 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 505 transitions, 9398 flow [2024-06-04 15:46:20,474 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) [2024-06-04 15:46:20,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:20,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:20,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 15:46:20,474 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)] === [2024-06-04 15:46:20,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:20,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1625414393, now seen corresponding path program 5 times [2024-06-04 15:46:20,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:20,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026475651] [2024-06-04 15:46:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:20,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:21,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:21,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026475651] [2024-06-04 15:46:21,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026475651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:21,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:21,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:46:21,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382260403] [2024-06-04 15:46:21,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:21,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:46:21,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:21,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:46:21,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:46:21,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:46:21,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 505 transitions, 9398 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) [2024-06-04 15:46:21,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:21,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:46:21,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:24,156 INFO L124 PetriNetUnfolderBase]: 7368/11478 cut-off events. [2024-06-04 15:46:24,157 INFO L125 PetriNetUnfolderBase]: For 544858/544875 co-relation queries the response was YES. [2024-06-04 15:46:24,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89562 conditions, 11478 events. 7368/11478 cut-off events. For 544858/544875 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 74829 event pairs, 2140 based on Foata normal form. 21/11498 useless extension candidates. Maximal degree in co-relation 89418. Up to 10676 conditions per place. [2024-06-04 15:46:24,309 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 418 selfloop transitions, 159 changer transitions 4/584 dead transitions. [2024-06-04 15:46:24,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 584 transitions, 11486 flow [2024-06-04 15:46:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:46:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:46:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-04 15:46:24,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-06-04 15:46:24,311 INFO L175 Difference]: Start difference. First operand has 294 places, 505 transitions, 9398 flow. Second operand 9 states and 179 transitions. [2024-06-04 15:46:24,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 584 transitions, 11486 flow [2024-06-04 15:46:25,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 584 transitions, 11223 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 15:46:25,958 INFO L231 Difference]: Finished difference. Result has 301 places, 534 transitions, 10231 flow [2024-06-04 15:46:25,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9154, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10231, PETRI_PLACES=301, PETRI_TRANSITIONS=534} [2024-06-04 15:46:25,959 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-04 15:46:25,959 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 534 transitions, 10231 flow [2024-06-04 15:46:25,959 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) [2024-06-04 15:46:25,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:25,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:25,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 15:46:25,960 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)] === [2024-06-04 15:46:25,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:25,960 INFO L85 PathProgramCache]: Analyzing trace with hash 497559135, now seen corresponding path program 1 times [2024-06-04 15:46:25,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:25,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659753451] [2024-06-04 15:46:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:25,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:26,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:26,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659753451] [2024-06-04 15:46:26,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659753451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:26,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:26,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:46:26,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685355155] [2024-06-04 15:46:26,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:26,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:46:26,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:26,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:46:26,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:46:26,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:46:26,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 534 transitions, 10231 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) [2024-06-04 15:46:26,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:26,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:46:26,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:29,460 INFO L124 PetriNetUnfolderBase]: 7278/11357 cut-off events. [2024-06-04 15:46:29,460 INFO L125 PetriNetUnfolderBase]: For 551609/551609 co-relation queries the response was YES. [2024-06-04 15:46:29,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90002 conditions, 11357 events. 7278/11357 cut-off events. For 551609/551609 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 73793 event pairs, 2889 based on Foata normal form. 8/11364 useless extension candidates. Maximal degree in co-relation 89852. Up to 11053 conditions per place. [2024-06-04 15:46:29,641 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 525 selfloop transitions, 33 changer transitions 0/561 dead transitions. [2024-06-04 15:46:29,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 561 transitions, 11525 flow [2024-06-04 15:46:29,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:46:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:46:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 15:46:29,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-04 15:46:29,643 INFO L175 Difference]: Start difference. First operand has 301 places, 534 transitions, 10231 flow. Second operand 7 states and 127 transitions. [2024-06-04 15:46:29,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 561 transitions, 11525 flow [2024-06-04 15:46:31,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 561 transitions, 11356 flow, removed 67 selfloop flow, removed 2 redundant places. [2024-06-04 15:46:31,461 INFO L231 Difference]: Finished difference. Result has 306 places, 534 transitions, 10134 flow [2024-06-04 15:46:31,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10064, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10134, PETRI_PLACES=306, PETRI_TRANSITIONS=534} [2024-06-04 15:46:31,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-04 15:46:31,465 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 534 transitions, 10134 flow [2024-06-04 15:46:31,465 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) [2024-06-04 15:46:31,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:31,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:31,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 15:46:31,465 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)] === [2024-06-04 15:46:31,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:31,466 INFO L85 PathProgramCache]: Analyzing trace with hash -249451029, now seen corresponding path program 1 times [2024-06-04 15:46:31,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:31,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909504872] [2024-06-04 15:46:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:31,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:32,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:32,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909504872] [2024-06-04 15:46:32,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909504872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:32,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:32,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:46:32,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574496969] [2024-06-04 15:46:32,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:32,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:46:32,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:32,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:46:32,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:46:32,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:46:32,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 534 transitions, 10134 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:32,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:32,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:46:32,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:34,655 INFO L124 PetriNetUnfolderBase]: 7304/11393 cut-off events. [2024-06-04 15:46:34,655 INFO L125 PetriNetUnfolderBase]: For 541081/541100 co-relation queries the response was YES. [2024-06-04 15:46:34,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89917 conditions, 11393 events. 7304/11393 cut-off events. For 541081/541100 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 74458 event pairs, 2000 based on Foata normal form. 18/11410 useless extension candidates. Maximal degree in co-relation 89765. Up to 10178 conditions per place. [2024-06-04 15:46:34,822 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 449 selfloop transitions, 182 changer transitions 9/643 dead transitions. [2024-06-04 15:46:34,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 643 transitions, 13143 flow [2024-06-04 15:46:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:46:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:46:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:46:34,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-04 15:46:34,824 INFO L175 Difference]: Start difference. First operand has 306 places, 534 transitions, 10134 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:46:34,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 643 transitions, 13143 flow [2024-06-04 15:46:36,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 643 transitions, 13045 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 15:46:36,445 INFO L231 Difference]: Finished difference. Result has 311 places, 592 transitions, 11647 flow [2024-06-04 15:46:36,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10042, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11647, PETRI_PLACES=311, PETRI_TRANSITIONS=592} [2024-06-04 15:46:36,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-04 15:46:36,446 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 592 transitions, 11647 flow [2024-06-04 15:46:36,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:36,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:36,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:36,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 15:46:36,447 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)] === [2024-06-04 15:46:36,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:36,447 INFO L85 PathProgramCache]: Analyzing trace with hash -244689429, now seen corresponding path program 2 times [2024-06-04 15:46:36,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:36,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809543184] [2024-06-04 15:46:36,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:36,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:37,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:37,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809543184] [2024-06-04 15:46:37,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809543184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:37,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:37,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:46:37,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172562435] [2024-06-04 15:46:37,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:37,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:46:37,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:46:37,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:46:37,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:46:37,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 592 transitions, 11647 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) [2024-06-04 15:46:37,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:37,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:46:37,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:40,155 INFO L124 PetriNetUnfolderBase]: 7256/11336 cut-off events. [2024-06-04 15:46:40,155 INFO L125 PetriNetUnfolderBase]: For 575771/575782 co-relation queries the response was YES. [2024-06-04 15:46:40,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92340 conditions, 11336 events. 7256/11336 cut-off events. For 575771/575782 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 74167 event pairs, 2107 based on Foata normal form. 18/11353 useless extension candidates. Maximal degree in co-relation 92185. Up to 9668 conditions per place. [2024-06-04 15:46:40,326 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 424 selfloop transitions, 226 changer transitions 0/653 dead transitions. [2024-06-04 15:46:40,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 653 transitions, 13629 flow [2024-06-04 15:46:40,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:46:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:46:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-04 15:46:40,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-04 15:46:40,328 INFO L175 Difference]: Start difference. First operand has 311 places, 592 transitions, 11647 flow. Second operand 11 states and 204 transitions. [2024-06-04 15:46:40,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 653 transitions, 13629 flow [2024-06-04 15:46:42,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 653 transitions, 13403 flow, removed 112 selfloop flow, removed 1 redundant places. [2024-06-04 15:46:42,623 INFO L231 Difference]: Finished difference. Result has 321 places, 601 transitions, 12124 flow [2024-06-04 15:46:42,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11507, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12124, PETRI_PLACES=321, PETRI_TRANSITIONS=601} [2024-06-04 15:46:42,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 280 predicate places. [2024-06-04 15:46:42,624 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 601 transitions, 12124 flow [2024-06-04 15:46:42,624 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) [2024-06-04 15:46:42,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:42,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:42,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 15:46:42,625 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)] === [2024-06-04 15:46:42,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:42,625 INFO L85 PathProgramCache]: Analyzing trace with hash -162759219, now seen corresponding path program 3 times [2024-06-04 15:46:42,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:42,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732998016] [2024-06-04 15:46:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:42,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:43,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:43,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732998016] [2024-06-04 15:46:43,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732998016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:43,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:43,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:46:43,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959233066] [2024-06-04 15:46:43,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:43,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:46:43,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:43,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:46:43,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:46:43,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:46:43,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 601 transitions, 12124 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:43,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:43,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:46:43,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:46,091 INFO L124 PetriNetUnfolderBase]: 7338/11457 cut-off events. [2024-06-04 15:46:46,091 INFO L125 PetriNetUnfolderBase]: For 588232/588261 co-relation queries the response was YES. [2024-06-04 15:46:46,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95048 conditions, 11457 events. 7338/11457 cut-off events. For 588232/588261 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 75121 event pairs, 2205 based on Foata normal form. 32/11488 useless extension candidates. Maximal degree in co-relation 94890. Up to 9983 conditions per place. [2024-06-04 15:46:46,273 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 458 selfloop transitions, 195 changer transitions 0/656 dead transitions. [2024-06-04 15:46:46,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 656 transitions, 14093 flow [2024-06-04 15:46:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:46:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:46:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 15:46:46,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-04 15:46:46,275 INFO L175 Difference]: Start difference. First operand has 321 places, 601 transitions, 12124 flow. Second operand 9 states and 166 transitions. [2024-06-04 15:46:46,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 656 transitions, 14093 flow [2024-06-04 15:46:48,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 656 transitions, 13520 flow, removed 66 selfloop flow, removed 9 redundant places. [2024-06-04 15:46:48,430 INFO L231 Difference]: Finished difference. Result has 322 places, 614 transitions, 12266 flow [2024-06-04 15:46:48,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11596, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12266, PETRI_PLACES=322, PETRI_TRANSITIONS=614} [2024-06-04 15:46:48,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-04 15:46:48,430 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 614 transitions, 12266 flow [2024-06-04 15:46:48,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:48,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:48,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:48,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 15:46:48,435 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)] === [2024-06-04 15:46:48,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:48,435 INFO L85 PathProgramCache]: Analyzing trace with hash -217723425, now seen corresponding path program 1 times [2024-06-04 15:46:48,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:48,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367907931] [2024-06-04 15:46:48,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:48,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:49,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:49,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367907931] [2024-06-04 15:46:49,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367907931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:49,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:49,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:46:49,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475434429] [2024-06-04 15:46:49,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:49,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:46:49,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:46:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:46:49,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:46:49,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 614 transitions, 12266 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) [2024-06-04 15:46:49,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:49,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:46:49,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:52,245 INFO L124 PetriNetUnfolderBase]: 7580/11818 cut-off events. [2024-06-04 15:46:52,246 INFO L125 PetriNetUnfolderBase]: For 704016/704045 co-relation queries the response was YES. [2024-06-04 15:46:52,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100425 conditions, 11818 events. 7580/11818 cut-off events. For 704016/704045 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 77596 event pairs, 2211 based on Foata normal form. 46/11863 useless extension candidates. Maximal degree in co-relation 100265. Up to 10014 conditions per place. [2024-06-04 15:46:52,433 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 487 selfloop transitions, 173 changer transitions 0/663 dead transitions. [2024-06-04 15:46:52,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 663 transitions, 14149 flow [2024-06-04 15:46:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:46:52,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:46:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:46:52,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-04 15:46:52,435 INFO L175 Difference]: Start difference. First operand has 322 places, 614 transitions, 12266 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:46:52,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 663 transitions, 14149 flow [2024-06-04 15:46:54,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 663 transitions, 13814 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-04 15:46:54,765 INFO L231 Difference]: Finished difference. Result has 325 places, 618 transitions, 12380 flow [2024-06-04 15:46:54,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11931, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12380, PETRI_PLACES=325, PETRI_TRANSITIONS=618} [2024-06-04 15:46:54,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-04 15:46:54,766 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 618 transitions, 12380 flow [2024-06-04 15:46:54,766 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) [2024-06-04 15:46:54,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:54,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:54,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 15:46:54,767 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)] === [2024-06-04 15:46:54,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:54,767 INFO L85 PathProgramCache]: Analyzing trace with hash -217662975, now seen corresponding path program 2 times [2024-06-04 15:46:54,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:54,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358486616] [2024-06-04 15:46:54,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:54,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:55,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:55,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358486616] [2024-06-04 15:46:55,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358486616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:55,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:55,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:46:55,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460992626] [2024-06-04 15:46:55,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:55,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:46:55,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:55,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:46:55,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:46:55,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:46:55,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 618 transitions, 12380 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) [2024-06-04 15:46:55,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:55,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:46:55,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:58,884 INFO L124 PetriNetUnfolderBase]: 7684/11980 cut-off events. [2024-06-04 15:46:58,884 INFO L125 PetriNetUnfolderBase]: For 745137/745166 co-relation queries the response was YES. [2024-06-04 15:46:59,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102716 conditions, 11980 events. 7684/11980 cut-off events. For 745137/745166 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 78879 event pairs, 2283 based on Foata normal form. 54/12033 useless extension candidates. Maximal degree in co-relation 102554. Up to 10618 conditions per place. [2024-06-04 15:46:59,081 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 492 selfloop transitions, 164 changer transitions 0/659 dead transitions. [2024-06-04 15:46:59,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 659 transitions, 14056 flow [2024-06-04 15:46:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:46:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:46:59,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 15:46:59,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-04 15:46:59,084 INFO L175 Difference]: Start difference. First operand has 325 places, 618 transitions, 12380 flow. Second operand 8 states and 149 transitions. [2024-06-04 15:46:59,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 659 transitions, 14056 flow [2024-06-04 15:47:01,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 659 transitions, 13815 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 15:47:01,780 INFO L231 Difference]: Finished difference. Result has 329 places, 620 transitions, 12526 flow [2024-06-04 15:47:01,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12145, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12526, PETRI_PLACES=329, PETRI_TRANSITIONS=620} [2024-06-04 15:47:01,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-04 15:47:01,781 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 620 transitions, 12526 flow [2024-06-04 15:47:01,781 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) [2024-06-04 15:47:01,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:01,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:01,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 15:47:01,782 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)] === [2024-06-04 15:47:01,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:01,782 INFO L85 PathProgramCache]: Analyzing trace with hash -875129365, now seen corresponding path program 4 times [2024-06-04 15:47:01,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:01,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449942158] [2024-06-04 15:47:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:01,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:03,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:03,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449942158] [2024-06-04 15:47:03,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449942158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:03,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:03,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:47:03,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028071215] [2024-06-04 15:47:03,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:03,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:47:03,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:03,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:47:03,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:47:03,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:47:03,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 620 transitions, 12526 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) [2024-06-04 15:47:03,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:03,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:47:03,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:06,456 INFO L124 PetriNetUnfolderBase]: 7694/11992 cut-off events. [2024-06-04 15:47:06,456 INFO L125 PetriNetUnfolderBase]: For 700350/700379 co-relation queries the response was YES. [2024-06-04 15:47:06,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103395 conditions, 11992 events. 7694/11992 cut-off events. For 700350/700379 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 78890 event pairs, 2297 based on Foata normal form. 28/12019 useless extension candidates. Maximal degree in co-relation 103231. Up to 11253 conditions per place. [2024-06-04 15:47:06,630 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 531 selfloop transitions, 132 changer transitions 3/669 dead transitions. [2024-06-04 15:47:06,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 669 transitions, 14468 flow [2024-06-04 15:47:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:47:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:47:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 15:47:06,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-04 15:47:06,632 INFO L175 Difference]: Start difference. First operand has 329 places, 620 transitions, 12526 flow. Second operand 9 states and 153 transitions. [2024-06-04 15:47:06,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 669 transitions, 14468 flow [2024-06-04 15:47:09,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 669 transitions, 14105 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 15:47:09,161 INFO L231 Difference]: Finished difference. Result has 334 places, 632 transitions, 12759 flow [2024-06-04 15:47:09,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12179, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12759, PETRI_PLACES=334, PETRI_TRANSITIONS=632} [2024-06-04 15:47:09,162 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 293 predicate places. [2024-06-04 15:47:09,162 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 632 transitions, 12759 flow [2024-06-04 15:47:09,162 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) [2024-06-04 15:47:09,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:09,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:09,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 15:47:09,162 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)] === [2024-06-04 15:47:09,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:09,163 INFO L85 PathProgramCache]: Analyzing trace with hash -594193109, now seen corresponding path program 3 times [2024-06-04 15:47:09,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:09,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207216895] [2024-06-04 15:47:09,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:09,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:10,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:10,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207216895] [2024-06-04 15:47:10,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207216895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:10,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:10,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:47:10,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247224432] [2024-06-04 15:47:10,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:10,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:47:10,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:10,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:47:10,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:47:10,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:47:10,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 632 transitions, 12759 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) [2024-06-04 15:47:10,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:10,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:47:10,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:13,697 INFO L124 PetriNetUnfolderBase]: 7726/12056 cut-off events. [2024-06-04 15:47:13,698 INFO L125 PetriNetUnfolderBase]: For 776642/776642 co-relation queries the response was YES. [2024-06-04 15:47:13,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103641 conditions, 12056 events. 7726/12056 cut-off events. For 776642/776642 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 79426 event pairs, 2760 based on Foata normal form. 28/12083 useless extension candidates. Maximal degree in co-relation 103474. Up to 11408 conditions per place. [2024-06-04 15:47:13,870 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 576 selfloop transitions, 85 changer transitions 0/664 dead transitions. [2024-06-04 15:47:13,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 664 transitions, 14332 flow [2024-06-04 15:47:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:47:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:47:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:47:13,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-04 15:47:13,871 INFO L175 Difference]: Start difference. First operand has 334 places, 632 transitions, 12759 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:47:13,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 664 transitions, 14332 flow [2024-06-04 15:47:16,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 664 transitions, 14056 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-04 15:47:16,748 INFO L231 Difference]: Finished difference. Result has 339 places, 634 transitions, 12728 flow [2024-06-04 15:47:16,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12495, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12728, PETRI_PLACES=339, PETRI_TRANSITIONS=634} [2024-06-04 15:47:16,751 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 298 predicate places. [2024-06-04 15:47:16,751 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 634 transitions, 12728 flow [2024-06-04 15:47:16,751 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) [2024-06-04 15:47:16,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:16,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:16,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 15:47:16,752 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)] === [2024-06-04 15:47:16,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:16,752 INFO L85 PathProgramCache]: Analyzing trace with hash -597918131, now seen corresponding path program 5 times [2024-06-04 15:47:16,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:16,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696946003] [2024-06-04 15:47:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:16,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:17,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:17,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696946003] [2024-06-04 15:47:17,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696946003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:17,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:17,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:47:17,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890681330] [2024-06-04 15:47:17,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:17,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:47:17,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:17,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:47:17,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:47:17,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:47:17,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 634 transitions, 12728 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:17,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:17,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:47:17,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:21,298 INFO L124 PetriNetUnfolderBase]: 7756/12098 cut-off events. [2024-06-04 15:47:21,299 INFO L125 PetriNetUnfolderBase]: For 741763/741763 co-relation queries the response was YES. [2024-06-04 15:47:21,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103967 conditions, 12098 events. 7756/12098 cut-off events. For 741763/741763 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 79762 event pairs, 2774 based on Foata normal form. 6/12103 useless extension candidates. Maximal degree in co-relation 103799. Up to 11562 conditions per place. [2024-06-04 15:47:21,468 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 573 selfloop transitions, 89 changer transitions 0/665 dead transitions. [2024-06-04 15:47:21,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 665 transitions, 14260 flow [2024-06-04 15:47:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:47:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:47:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-04 15:47:21,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-04 15:47:21,470 INFO L175 Difference]: Start difference. First operand has 339 places, 634 transitions, 12728 flow. Second operand 9 states and 152 transitions. [2024-06-04 15:47:21,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 665 transitions, 14260 flow [2024-06-04 15:47:24,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 665 transitions, 14073 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-04 15:47:24,482 INFO L231 Difference]: Finished difference. Result has 341 places, 640 transitions, 12834 flow [2024-06-04 15:47:24,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12541, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12834, PETRI_PLACES=341, PETRI_TRANSITIONS=640} [2024-06-04 15:47:24,483 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-04 15:47:24,483 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 640 transitions, 12834 flow [2024-06-04 15:47:24,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:24,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:24,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:24,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 15:47:24,488 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)] === [2024-06-04 15:47:24,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:24,488 INFO L85 PathProgramCache]: Analyzing trace with hash -598008341, now seen corresponding path program 6 times [2024-06-04 15:47:24,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:24,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992319068] [2024-06-04 15:47:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:24,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:25,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:25,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992319068] [2024-06-04 15:47:25,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992319068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:25,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:25,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:47:25,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045261704] [2024-06-04 15:47:25,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:25,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:47:25,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:25,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:47:25,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:47:25,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:47:25,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 640 transitions, 12834 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:25,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:25,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:47:25,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:28,907 INFO L124 PetriNetUnfolderBase]: 7766/12112 cut-off events. [2024-06-04 15:47:28,907 INFO L125 PetriNetUnfolderBase]: For 745244/745244 co-relation queries the response was YES. [2024-06-04 15:47:29,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103983 conditions, 12112 events. 7766/12112 cut-off events. For 745244/745244 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 79967 event pairs, 2852 based on Foata normal form. 2/12113 useless extension candidates. Maximal degree in co-relation 103814. Up to 11829 conditions per place. [2024-06-04 15:47:29,279 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 607 selfloop transitions, 53 changer transitions 0/663 dead transitions. [2024-06-04 15:47:29,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 663 transitions, 14279 flow [2024-06-04 15:47:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:47:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:47:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-04 15:47:29,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-04 15:47:29,281 INFO L175 Difference]: Start difference. First operand has 341 places, 640 transitions, 12834 flow. Second operand 9 states and 143 transitions. [2024-06-04 15:47:29,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 663 transitions, 14279 flow [2024-06-04 15:47:31,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 663 transitions, 14069 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-04 15:47:31,775 INFO L231 Difference]: Finished difference. Result has 344 places, 644 transitions, 12811 flow [2024-06-04 15:47:31,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12624, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12811, PETRI_PLACES=344, PETRI_TRANSITIONS=644} [2024-06-04 15:47:31,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-04 15:47:31,776 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 644 transitions, 12811 flow [2024-06-04 15:47:31,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:31,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:31,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:31,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 15:47:31,776 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)] === [2024-06-04 15:47:31,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:31,777 INFO L85 PathProgramCache]: Analyzing trace with hash -251177915, now seen corresponding path program 1 times [2024-06-04 15:47:31,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:31,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697681320] [2024-06-04 15:47:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:31,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:32,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:32,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697681320] [2024-06-04 15:47:32,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697681320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:32,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:32,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:47:32,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005091085] [2024-06-04 15:47:32,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:32,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:47:32,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:32,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:47:32,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:47:32,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:47:32,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 644 transitions, 12811 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:32,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:32,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:47:32,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:37,329 INFO L124 PetriNetUnfolderBase]: 8864/13885 cut-off events. [2024-06-04 15:47:37,330 INFO L125 PetriNetUnfolderBase]: For 1155349/1155368 co-relation queries the response was YES. [2024-06-04 15:47:37,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121037 conditions, 13885 events. 8864/13885 cut-off events. For 1155349/1155368 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 92572 event pairs, 2124 based on Foata normal form. 64/13948 useless extension candidates. Maximal degree in co-relation 120866. Up to 8178 conditions per place. [2024-06-04 15:47:37,512 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 382 selfloop transitions, 336 changer transitions 6/727 dead transitions. [2024-06-04 15:47:37,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 727 transitions, 15510 flow [2024-06-04 15:47:37,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:47:37,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:47:37,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-04 15:47:37,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-04 15:47:37,514 INFO L175 Difference]: Start difference. First operand has 344 places, 644 transitions, 12811 flow. Second operand 10 states and 205 transitions. [2024-06-04 15:47:37,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 727 transitions, 15510 flow [2024-06-04 15:47:40,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 727 transitions, 15413 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 15:47:40,941 INFO L231 Difference]: Finished difference. Result has 351 places, 647 transitions, 13477 flow [2024-06-04 15:47:40,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12714, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13477, PETRI_PLACES=351, PETRI_TRANSITIONS=647} [2024-06-04 15:47:40,942 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-04 15:47:40,942 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 647 transitions, 13477 flow [2024-06-04 15:47:40,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:40,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:40,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:40,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 15:47:40,943 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)] === [2024-06-04 15:47:40,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:40,943 INFO L85 PathProgramCache]: Analyzing trace with hash -244682795, now seen corresponding path program 2 times [2024-06-04 15:47:40,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:40,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533601987] [2024-06-04 15:47:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:40,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:42,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:42,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533601987] [2024-06-04 15:47:42,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533601987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:42,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:42,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:47:42,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30713331] [2024-06-04 15:47:42,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:42,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:47:42,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:42,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:47:42,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:47:42,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:47:42,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 647 transitions, 13477 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:42,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:42,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:47:42,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:46,321 INFO L124 PetriNetUnfolderBase]: 8973/14081 cut-off events. [2024-06-04 15:47:46,321 INFO L125 PetriNetUnfolderBase]: For 1213648/1213667 co-relation queries the response was YES. [2024-06-04 15:47:46,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124484 conditions, 14081 events. 8973/14081 cut-off events. For 1213648/1213667 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 94565 event pairs, 2690 based on Foata normal form. 70/14150 useless extension candidates. Maximal degree in co-relation 124310. Up to 11641 conditions per place. [2024-06-04 15:47:46,538 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 382 selfloop transitions, 317 changer transitions 2/704 dead transitions. [2024-06-04 15:47:46,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 704 transitions, 15687 flow [2024-06-04 15:47:46,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:47:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:47:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-04 15:47:46,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-06-04 15:47:46,539 INFO L175 Difference]: Start difference. First operand has 351 places, 647 transitions, 13477 flow. Second operand 10 states and 194 transitions. [2024-06-04 15:47:46,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 704 transitions, 15687 flow [2024-06-04 15:47:50,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 704 transitions, 15254 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 15:47:50,770 INFO L231 Difference]: Finished difference. Result has 356 places, 648 transitions, 13715 flow [2024-06-04 15:47:50,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13044, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13715, PETRI_PLACES=356, PETRI_TRANSITIONS=648} [2024-06-04 15:47:50,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-04 15:47:50,772 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 648 transitions, 13715 flow [2024-06-04 15:47:50,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:50,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:50,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:50,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 15:47:50,772 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)] === [2024-06-04 15:47:50,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:50,773 INFO L85 PathProgramCache]: Analyzing trace with hash -244691165, now seen corresponding path program 3 times [2024-06-04 15:47:50,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:50,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802810981] [2024-06-04 15:47:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:50,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:51,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:51,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802810981] [2024-06-04 15:47:51,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802810981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:51,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:51,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:47:51,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215434674] [2024-06-04 15:47:51,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:51,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:47:51,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:51,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:47:51,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:47:52,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-04 15:47:52,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 648 transitions, 13715 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:52,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:52,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-04 15:47:52,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:56,432 INFO L124 PetriNetUnfolderBase]: 9247/14531 cut-off events. [2024-06-04 15:47:56,433 INFO L125 PetriNetUnfolderBase]: For 1255190/1255209 co-relation queries the response was YES. [2024-06-04 15:47:56,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128937 conditions, 14531 events. 9247/14531 cut-off events. For 1255190/1255209 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 98374 event pairs, 2628 based on Foata normal form. 64/14594 useless extension candidates. Maximal degree in co-relation 128761. Up to 11647 conditions per place. [2024-06-04 15:47:56,696 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 391 selfloop transitions, 316 changer transitions 6/716 dead transitions. [2024-06-04 15:47:56,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 716 transitions, 16234 flow [2024-06-04 15:47:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:47:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:47:56,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-04 15:47:56,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025 [2024-06-04 15:47:56,697 INFO L175 Difference]: Start difference. First operand has 356 places, 648 transitions, 13715 flow. Second operand 10 states and 201 transitions. [2024-06-04 15:47:56,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 716 transitions, 16234 flow [2024-06-04 15:48:00,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 716 transitions, 15592 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 15:48:00,834 INFO L231 Difference]: Finished difference. Result has 359 places, 649 transitions, 13699 flow [2024-06-04 15:48:00,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13073, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13699, PETRI_PLACES=359, PETRI_TRANSITIONS=649} [2024-06-04 15:48:00,835 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-04 15:48:00,835 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 649 transitions, 13699 flow [2024-06-04 15:48:00,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:00,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:48:00,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:48:00,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 15:48:00,836 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)] === [2024-06-04 15:48:00,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:48:00,836 INFO L85 PathProgramCache]: Analyzing trace with hash -230307817, now seen corresponding path program 4 times [2024-06-04 15:48:00,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:48:00,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862284139] [2024-06-04 15:48:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:48:00,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:48:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat