./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix025_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix025_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix025_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix025_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:11:55,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:11:55,949 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:11:55,955 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:11:55,955 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:11:55,983 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:11:55,983 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:11:55,984 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:11:55,984 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:11:55,988 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:11:55,988 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:11:55,988 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:11:55,989 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:11:55,990 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:11:55,990 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:11:55,991 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:11:55,991 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:11:55,991 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:11:55,991 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:11:55,991 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:11:55,992 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:11:55,992 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:11:55,992 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:11:55,992 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:11:55,993 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:11:55,993 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:11:55,993 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:11:55,993 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:11:55,994 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:11:55,994 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:11:55,995 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:11:55,995 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:11:55,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:11:55,995 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:11:55,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:11:55,996 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:11:55,996 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:11:55,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:11:55,996 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:11:55,996 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:11:55,997 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:11:55,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:11:55,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:11:55,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:11:56,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:11:56,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:11:56,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:11:56,268 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:11:56,269 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:11:56,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix025_pso.opt_rmo.opt.i [2024-06-27 20:11:57,285 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:11:57,460 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:11:57,463 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix025_pso.opt_rmo.opt.i [2024-06-27 20:11:57,476 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abcb30b9e/32b76db9015a40c8afcc3790d0d166bc/FLAG20127e488 [2024-06-27 20:11:57,487 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abcb30b9e/32b76db9015a40c8afcc3790d0d166bc [2024-06-27 20:11:57,489 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:11:57,489 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:11:57,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix025_pso.opt_rmo.opt.yml/witness.yml [2024-06-27 20:11:57,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:11:57,600 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:11:57,600 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:11:57,601 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:11:57,604 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:11:57,605 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:11:57" (1/2) ... [2024-06-27 20:11:57,606 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7482457a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:11:57, skipping insertion in model container [2024-06-27 20:11:57,606 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:11:57" (1/2) ... [2024-06-27 20:11:57,607 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@171a1211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:11:57, skipping insertion in model container [2024-06-27 20:11:57,607 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:11:57" (2/2) ... [2024-06-27 20:11:57,607 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7482457a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:57, skipping insertion in model container [2024-06-27 20:11:57,608 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:11:57" (2/2) ... [2024-06-27 20:11:57,608 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:11:57,740 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:11:57,741 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 20:11:57,741 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 20:11:57,741 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 20:11:57,742 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:11:57,742 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-27 20:11:57,767 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:11:58,074 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:11:58,082 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:11:58,211 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:11:58,256 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:11:58,258 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58 WrapperNode [2024-06-27 20:11:58,258 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:11:58,259 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:11:58,260 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:11:58,260 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:11:58,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58" (1/1) ... [2024-06-27 20:11:58,285 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58" (1/1) ... [2024-06-27 20:11:58,319 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-27 20:11:58,322 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:11:58,323 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:11:58,323 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:11:58,323 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:11:58,331 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58" (1/1) ... [2024-06-27 20:11:58,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58" (1/1) ... [2024-06-27 20:11:58,345 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58" (1/1) ... [2024-06-27 20:11:58,367 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]. [2024-06-27 20:11:58,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58" (1/1) ... [2024-06-27 20:11:58,368 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58" (1/1) ... [2024-06-27 20:11:58,373 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58" (1/1) ... [2024-06-27 20:11:58,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58" (1/1) ... [2024-06-27 20:11:58,381 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58" (1/1) ... [2024-06-27 20:11:58,387 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58" (1/1) ... [2024-06-27 20:11:58,389 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:11:58,393 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:11:58,393 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:11:58,393 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:11:58,394 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58" (1/1) ... [2024-06-27 20:11:58,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:11:58,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:11:58,433 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) [2024-06-27 20:11:58,454 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 [2024-06-27 20:11:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:11:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:11:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:11:58,479 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:11:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:11:58,480 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:11:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:11:58,480 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:11:58,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:11:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:11:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:11:58,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:11:58,484 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:11:58,640 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:11:58,643 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:11:59,007 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:11:59,008 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:11:59,181 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:11:59,182 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:11:59,183 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:11:59 BoogieIcfgContainer [2024-06-27 20:11:59,183 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:11:59,184 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:11:59,185 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:11:59,187 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:11:59,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:11:57" (1/4) ... [2024-06-27 20:11:59,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4537e63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:11:59, skipping insertion in model container [2024-06-27 20:11:59,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:11:57" (2/4) ... [2024-06-27 20:11:59,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4537e63a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:11:59, skipping insertion in model container [2024-06-27 20:11:59,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:11:58" (3/4) ... [2024-06-27 20:11:59,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4537e63a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:11:59, skipping insertion in model container [2024-06-27 20:11:59,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:11:59" (4/4) ... [2024-06-27 20:11:59,190 INFO L112 eAbstractionObserver]: Analyzing ICFG mix025_pso.opt_rmo.opt.i [2024-06-27 20:11:59,203 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:11:59,203 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:11:59,203 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:11:59,242 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:11:59,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 20:11:59,294 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 20:11:59,295 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:11:59,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:11:59,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 20:11:59,300 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 20:11:59,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:11:59,319 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;@b7a60d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:11:59,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:11:59,324 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:11:59,324 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:11:59,324 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:11:59,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:59,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:11:59,326 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)] === [2024-06-27 20:11:59,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:59,330 INFO L85 PathProgramCache]: Analyzing trace with hash 362366708, now seen corresponding path program 1 times [2024-06-27 20:11:59,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:59,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942221674] [2024-06-27 20:11:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:59,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:00,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:00,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942221674] [2024-06-27 20:12:00,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942221674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:00,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:00,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:12:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934828558] [2024-06-27 20:12:00,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:00,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:12:00,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:00,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:12:00,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:12:00,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-27 20:12:00,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:00,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:00,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-27 20:12:00,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:00,532 INFO L124 PetriNetUnfolderBase]: 1152/1852 cut-off events. [2024-06-27 20:12:00,532 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 20:12:00,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3669 conditions, 1852 events. 1152/1852 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9237 event pairs, 785 based on Foata normal form. 1/1778 useless extension candidates. Maximal degree in co-relation 3657. Up to 1732 conditions per place. [2024-06-27 20:12:00,544 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 20:12:00,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 169 flow [2024-06-27 20:12:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:12:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:12:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-27 20:12:00,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-27 20:12:00,553 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 77 transitions. [2024-06-27 20:12:00,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 169 flow [2024-06-27 20:12:00,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:12:00,557 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 20:12:00,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 20:12:00,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 20:12:00,561 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 20:12:00,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:00,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:00,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:00,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:12:00,562 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)] === [2024-06-27 20:12:00,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:00,562 INFO L85 PathProgramCache]: Analyzing trace with hash 342093779, now seen corresponding path program 1 times [2024-06-27 20:12:00,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:00,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186280254] [2024-06-27 20:12:00,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:00,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:00,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:00,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186280254] [2024-06-27 20:12:00,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186280254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:00,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:00,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:12:00,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595083694] [2024-06-27 20:12:00,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:00,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:12:00,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:00,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:12:00,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:12:00,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:12:00,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2024-06-27 20:12:00,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:00,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:12:00,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:01,216 INFO L124 PetriNetUnfolderBase]: 1347/2081 cut-off events. [2024-06-27 20:12:01,217 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2024-06-27 20:12:01,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4722 conditions, 2081 events. 1347/2081 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10036 event pairs, 649 based on Foata normal form. 6/2076 useless extension candidates. Maximal degree in co-relation 4710. Up to 1981 conditions per place. [2024-06-27 20:12:01,226 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 20:12:01,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 242 flow [2024-06-27 20:12:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:12:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:12:01,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-27 20:12:01,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 20:12:01,228 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 98 transitions. [2024-06-27 20:12:01,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 242 flow [2024-06-27 20:12:01,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:12:01,229 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-27 20:12:01,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 20:12:01,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-27 20:12:01,230 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-27 20:12:01,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2024-06-27 20:12:01,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:01,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:01,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:12:01,231 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)] === [2024-06-27 20:12:01,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:01,231 INFO L85 PathProgramCache]: Analyzing trace with hash -640371016, now seen corresponding path program 1 times [2024-06-27 20:12:01,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:01,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749633945] [2024-06-27 20:12:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:01,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:01,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:01,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749633945] [2024-06-27 20:12:01,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749633945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:01,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:01,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:12:01,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333590917] [2024-06-27 20:12:01,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:01,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:12:01,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:01,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:12:01,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:12:02,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:12:02,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2024-06-27 20:12:02,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:02,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:12:02,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:02,365 INFO L124 PetriNetUnfolderBase]: 1338/2066 cut-off events. [2024-06-27 20:12:02,366 INFO L125 PetriNetUnfolderBase]: For 1107/1107 co-relation queries the response was YES. [2024-06-27 20:12:02,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5215 conditions, 2066 events. 1338/2066 cut-off events. For 1107/1107 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9949 event pairs, 485 based on Foata normal form. 6/2061 useless extension candidates. Maximal degree in co-relation 5201. Up to 1936 conditions per place. [2024-06-27 20:12:02,374 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 50 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-27 20:12:02,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 348 flow [2024-06-27 20:12:02,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 20:12:02,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-27 20:12:02,376 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 6 states and 137 transitions. [2024-06-27 20:12:02,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 68 transitions, 348 flow [2024-06-27 20:12:02,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 328 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 20:12:02,378 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 179 flow [2024-06-27 20:12:02,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-27 20:12:02,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-27 20:12:02,379 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 179 flow [2024-06-27 20:12:02,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2024-06-27 20:12:02,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:02,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:02,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:12:02,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:02,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:02,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1396552970, now seen corresponding path program 1 times [2024-06-27 20:12:02,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:02,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199978968] [2024-06-27 20:12:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:02,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:02,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:02,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199978968] [2024-06-27 20:12:02,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199978968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:02,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:02,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:12:02,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864958524] [2024-06-27 20:12:02,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:02,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:12:02,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:02,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:12:02,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:12:02,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-27 20:12:02,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:02,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:02,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-27 20:12:02,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:03,111 INFO L124 PetriNetUnfolderBase]: 1126/1832 cut-off events. [2024-06-27 20:12:03,111 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2024-06-27 20:12:03,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5000 conditions, 1832 events. 1126/1832 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9199 event pairs, 487 based on Foata normal form. 2/1803 useless extension candidates. Maximal degree in co-relation 4983. Up to 1683 conditions per place. [2024-06-27 20:12:03,120 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-27 20:12:03,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 321 flow [2024-06-27 20:12:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:12:03,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:12:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-27 20:12:03,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-27 20:12:03,122 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 179 flow. Second operand 5 states and 99 transitions. [2024-06-27 20:12:03,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 321 flow [2024-06-27 20:12:03,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 294 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:12:03,125 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-27 20:12:03,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 20:12:03,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-27 20:12:03,126 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-27 20:12:03,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:03,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:03,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:03,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:12:03,127 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:03,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:03,127 INFO L85 PathProgramCache]: Analyzing trace with hash -317550184, now seen corresponding path program 1 times [2024-06-27 20:12:03,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:03,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824716248] [2024-06-27 20:12:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:03,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:03,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:03,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824716248] [2024-06-27 20:12:03,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824716248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:03,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:03,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:03,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325635151] [2024-06-27 20:12:03,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:03,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:03,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:03,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:03,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:03,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:03,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:03,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:03,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:03,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:04,049 INFO L124 PetriNetUnfolderBase]: 1335/2073 cut-off events. [2024-06-27 20:12:04,049 INFO L125 PetriNetUnfolderBase]: For 3047/3047 co-relation queries the response was YES. [2024-06-27 20:12:04,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6181 conditions, 2073 events. 1335/2073 cut-off events. For 3047/3047 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10000 event pairs, 569 based on Foata normal form. 3/2075 useless extension candidates. Maximal degree in co-relation 6162. Up to 1955 conditions per place. [2024-06-27 20:12:04,059 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 51 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-27 20:12:04,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 440 flow [2024-06-27 20:12:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:04,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 20:12:04,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-27 20:12:04,061 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 6 states and 118 transitions. [2024-06-27 20:12:04,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 440 flow [2024-06-27 20:12:04,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 73 transitions, 420 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:12:04,064 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 297 flow [2024-06-27 20:12:04,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-06-27 20:12:04,064 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-27 20:12:04,065 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 297 flow [2024-06-27 20:12:04,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:04,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:04,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:04,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:12:04,065 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)] === [2024-06-27 20:12:04,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:04,066 INFO L85 PathProgramCache]: Analyzing trace with hash -203461313, now seen corresponding path program 1 times [2024-06-27 20:12:04,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:04,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103449058] [2024-06-27 20:12:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:04,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:04,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:04,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103449058] [2024-06-27 20:12:04,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103449058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:04,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:04,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:04,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927770516] [2024-06-27 20:12:04,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:04,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:04,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:04,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:04,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:04,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:04,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:04,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:04,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:04,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:05,022 INFO L124 PetriNetUnfolderBase]: 1409/2191 cut-off events. [2024-06-27 20:12:05,023 INFO L125 PetriNetUnfolderBase]: For 5223/5233 co-relation queries the response was YES. [2024-06-27 20:12:05,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7379 conditions, 2191 events. 1409/2191 cut-off events. For 5223/5233 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10578 event pairs, 568 based on Foata normal form. 4/2183 useless extension candidates. Maximal degree in co-relation 7357. Up to 2047 conditions per place. [2024-06-27 20:12:05,034 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-06-27 20:12:05,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 78 transitions, 509 flow [2024-06-27 20:12:05,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:12:05,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 20:12:05,036 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 297 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:12:05,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 78 transitions, 509 flow [2024-06-27 20:12:05,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 495 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 20:12:05,040 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 341 flow [2024-06-27 20:12:05,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-27 20:12:05,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-27 20:12:05,041 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 341 flow [2024-06-27 20:12:05,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:05,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:05,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:05,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:12:05,041 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)] === [2024-06-27 20:12:05,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:05,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1254128261, now seen corresponding path program 2 times [2024-06-27 20:12:05,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:05,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252613854] [2024-06-27 20:12:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:05,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:05,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:05,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252613854] [2024-06-27 20:12:05,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252613854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:05,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:05,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:05,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559831260] [2024-06-27 20:12:05,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:05,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:05,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:05,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:05,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:05,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:05,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:05,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:05,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:05,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:05,930 INFO L124 PetriNetUnfolderBase]: 1415/2207 cut-off events. [2024-06-27 20:12:05,931 INFO L125 PetriNetUnfolderBase]: For 7055/7071 co-relation queries the response was YES. [2024-06-27 20:12:05,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7960 conditions, 2207 events. 1415/2207 cut-off events. For 7055/7071 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10724 event pairs, 575 based on Foata normal form. 8/2203 useless extension candidates. Maximal degree in co-relation 7935. Up to 2029 conditions per place. [2024-06-27 20:12:05,944 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 55 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-27 20:12:05,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 557 flow [2024-06-27 20:12:05,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:12:05,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 20:12:05,961 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 341 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:12:05,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 557 flow [2024-06-27 20:12:05,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 523 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:05,966 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 381 flow [2024-06-27 20:12:05,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-27 20:12:05,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-27 20:12:05,967 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 381 flow [2024-06-27 20:12:05,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:05,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:05,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:05,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:12:05,968 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)] === [2024-06-27 20:12:05,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:05,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1254120325, now seen corresponding path program 1 times [2024-06-27 20:12:05,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:05,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886834084] [2024-06-27 20:12:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:05,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:06,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:06,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886834084] [2024-06-27 20:12:06,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886834084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:06,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:06,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:12:06,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748817531] [2024-06-27 20:12:06,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:06,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:12:06,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:06,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:12:06,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:12:06,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:06,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 381 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:06,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:06,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:06,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:07,285 INFO L124 PetriNetUnfolderBase]: 1365/2148 cut-off events. [2024-06-27 20:12:07,286 INFO L125 PetriNetUnfolderBase]: For 8574/8574 co-relation queries the response was YES. [2024-06-27 20:12:07,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8202 conditions, 2148 events. 1365/2148 cut-off events. For 8574/8574 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10486 event pairs, 533 based on Foata normal form. 3/2150 useless extension candidates. Maximal degree in co-relation 8176. Up to 1986 conditions per place. [2024-06-27 20:12:07,297 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 61 selfloop transitions, 21 changer transitions 0/87 dead transitions. [2024-06-27 20:12:07,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 655 flow [2024-06-27 20:12:07,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:12:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:12:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:12:07,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-27 20:12:07,299 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 381 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:12:07,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 655 flow [2024-06-27 20:12:07,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 605 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:07,305 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 420 flow [2024-06-27 20:12:07,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-27 20:12:07,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-27 20:12:07,305 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 420 flow [2024-06-27 20:12:07,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:07,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:07,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:07,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:12:07,306 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)] === [2024-06-27 20:12:07,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash 461921059, now seen corresponding path program 1 times [2024-06-27 20:12:07,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:07,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457981461] [2024-06-27 20:12:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:07,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:08,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:08,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457981461] [2024-06-27 20:12:08,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457981461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:08,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:08,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:12:08,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23648413] [2024-06-27 20:12:08,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:08,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:12:08,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:08,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:12:08,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:12:08,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:08,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 420 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:08,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:08,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:08,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:08,604 INFO L124 PetriNetUnfolderBase]: 1445/2233 cut-off events. [2024-06-27 20:12:08,604 INFO L125 PetriNetUnfolderBase]: For 11854/11873 co-relation queries the response was YES. [2024-06-27 20:12:08,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9186 conditions, 2233 events. 1445/2233 cut-off events. For 11854/11873 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10717 event pairs, 571 based on Foata normal form. 3/2229 useless extension candidates. Maximal degree in co-relation 9159. Up to 2071 conditions per place. [2024-06-27 20:12:08,621 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-27 20:12:08,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 690 flow [2024-06-27 20:12:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:12:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:12:08,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:12:08,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-27 20:12:08,622 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 420 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:12:08,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 690 flow [2024-06-27 20:12:08,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 631 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:08,629 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 439 flow [2024-06-27 20:12:08,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-27 20:12:08,630 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-27 20:12:08,630 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 439 flow [2024-06-27 20:12:08,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:08,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:08,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:08,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:12:08,631 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)] === [2024-06-27 20:12:08,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:08,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2012332651, now seen corresponding path program 1 times [2024-06-27 20:12:08,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:08,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036330485] [2024-06-27 20:12:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:08,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:09,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:09,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036330485] [2024-06-27 20:12:09,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036330485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:09,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:09,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:12:09,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048454360] [2024-06-27 20:12:09,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:09,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:12:09,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:09,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:12:09,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:12:09,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:09,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 439 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:09,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:09,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:09,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:09,783 INFO L124 PetriNetUnfolderBase]: 1635/2454 cut-off events. [2024-06-27 20:12:09,796 INFO L125 PetriNetUnfolderBase]: For 15031/15031 co-relation queries the response was YES. [2024-06-27 20:12:09,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10603 conditions, 2454 events. 1635/2454 cut-off events. For 15031/15031 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11455 event pairs, 592 based on Foata normal form. 6/2459 useless extension candidates. Maximal degree in co-relation 10575. Up to 2319 conditions per place. [2024-06-27 20:12:09,807 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 81 selfloop transitions, 22 changer transitions 0/107 dead transitions. [2024-06-27 20:12:09,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 861 flow [2024-06-27 20:12:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:12:09,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:12:09,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:12:09,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-27 20:12:09,813 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 439 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:12:09,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 861 flow [2024-06-27 20:12:09,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 107 transitions, 807 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:09,820 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 561 flow [2024-06-27 20:12:09,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=561, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2024-06-27 20:12:09,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-27 20:12:09,821 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 561 flow [2024-06-27 20:12:09,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:09,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:09,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:09,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:12:09,822 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)] === [2024-06-27 20:12:09,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:09,822 INFO L85 PathProgramCache]: Analyzing trace with hash -223032521, now seen corresponding path program 2 times [2024-06-27 20:12:09,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:09,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69303972] [2024-06-27 20:12:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:09,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:10,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:10,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69303972] [2024-06-27 20:12:10,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69303972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:10,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:10,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:12:10,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625737280] [2024-06-27 20:12:10,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:10,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:12:10,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:12:10,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:12:10,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:10,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 561 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:10,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:10,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:10,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:11,004 INFO L124 PetriNetUnfolderBase]: 1719/2583 cut-off events. [2024-06-27 20:12:11,005 INFO L125 PetriNetUnfolderBase]: For 20639/20643 co-relation queries the response was YES. [2024-06-27 20:12:11,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12344 conditions, 2583 events. 1719/2583 cut-off events. For 20639/20643 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12188 event pairs, 597 based on Foata normal form. 10/2592 useless extension candidates. Maximal degree in co-relation 12313. Up to 2285 conditions per place. [2024-06-27 20:12:11,022 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 72 selfloop transitions, 42 changer transitions 0/118 dead transitions. [2024-06-27 20:12:11,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 1079 flow [2024-06-27 20:12:11,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:12:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:12:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:12:11,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-27 20:12:11,024 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 561 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:12:11,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 1079 flow [2024-06-27 20:12:11,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 118 transitions, 1021 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 20:12:11,041 INFO L231 Difference]: Finished difference. Result has 78 places, 92 transitions, 772 flow [2024-06-27 20:12:11,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=772, PETRI_PLACES=78, PETRI_TRANSITIONS=92} [2024-06-27 20:12:11,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-27 20:12:11,042 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 92 transitions, 772 flow [2024-06-27 20:12:11,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:11,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:11,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:11,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:12:11,043 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)] === [2024-06-27 20:12:11,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:11,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1204227751, now seen corresponding path program 3 times [2024-06-27 20:12:11,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:11,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142322139] [2024-06-27 20:12:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:11,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:11,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:11,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142322139] [2024-06-27 20:12:11,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142322139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:11,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:11,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:12:11,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527626387] [2024-06-27 20:12:11,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:11,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:12:11,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:11,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:12:11,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:12:11,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:11,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 772 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:11,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:11,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:11,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:12,083 INFO L124 PetriNetUnfolderBase]: 1707/2570 cut-off events. [2024-06-27 20:12:12,084 INFO L125 PetriNetUnfolderBase]: For 24258/24262 co-relation queries the response was YES. [2024-06-27 20:12:12,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13020 conditions, 2570 events. 1707/2570 cut-off events. For 24258/24262 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12159 event pairs, 607 based on Foata normal form. 10/2579 useless extension candidates. Maximal degree in co-relation 12986. Up to 2279 conditions per place. [2024-06-27 20:12:12,098 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 76 selfloop transitions, 37 changer transitions 0/117 dead transitions. [2024-06-27 20:12:12,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 117 transitions, 1130 flow [2024-06-27 20:12:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:12:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:12:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:12:12,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-27 20:12:12,100 INFO L175 Difference]: Start difference. First operand has 78 places, 92 transitions, 772 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:12:12,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 117 transitions, 1130 flow [2024-06-27 20:12:12,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 117 transitions, 1043 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-27 20:12:12,120 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 769 flow [2024-06-27 20:12:12,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=769, PETRI_PLACES=83, PETRI_TRANSITIONS=92} [2024-06-27 20:12:12,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-27 20:12:12,121 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 769 flow [2024-06-27 20:12:12,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:12,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:12,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:12,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:12:12,122 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)] === [2024-06-27 20:12:12,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:12,122 INFO L85 PathProgramCache]: Analyzing trace with hash -223023593, now seen corresponding path program 1 times [2024-06-27 20:12:12,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:12,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112753545] [2024-06-27 20:12:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:12,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:12,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:12,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112753545] [2024-06-27 20:12:12,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112753545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:12,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:12,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:12:12,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883269745] [2024-06-27 20:12:12,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:12,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:12:12,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:12:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:12:13,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:13,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 92 transitions, 769 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:13,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:13,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:13,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:13,438 INFO L124 PetriNetUnfolderBase]: 1503/2363 cut-off events. [2024-06-27 20:12:13,439 INFO L125 PetriNetUnfolderBase]: For 21035/21035 co-relation queries the response was YES. [2024-06-27 20:12:13,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11533 conditions, 2363 events. 1503/2363 cut-off events. For 21035/21035 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11617 event pairs, 506 based on Foata normal form. 6/2368 useless extension candidates. Maximal degree in co-relation 11497. Up to 2157 conditions per place. [2024-06-27 20:12:13,455 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 92 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2024-06-27 20:12:13,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 121 transitions, 1155 flow [2024-06-27 20:12:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:12:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:12:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:12:13,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-27 20:12:13,457 INFO L175 Difference]: Start difference. First operand has 83 places, 92 transitions, 769 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:12:13,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 121 transitions, 1155 flow [2024-06-27 20:12:13,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 121 transitions, 1022 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:12:13,476 INFO L231 Difference]: Finished difference. Result has 83 places, 95 transitions, 740 flow [2024-06-27 20:12:13,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=740, PETRI_PLACES=83, PETRI_TRANSITIONS=95} [2024-06-27 20:12:13,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-27 20:12:13,477 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 95 transitions, 740 flow [2024-06-27 20:12:13,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:13,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:13,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:13,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:12:13,478 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:13,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:13,478 INFO L85 PathProgramCache]: Analyzing trace with hash 368949640, now seen corresponding path program 1 times [2024-06-27 20:12:13,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:13,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268258614] [2024-06-27 20:12:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:13,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:13,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:13,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268258614] [2024-06-27 20:12:13,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268258614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:13,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:13,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:12:13,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589299164] [2024-06-27 20:12:13,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:13,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:12:13,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:13,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:12:13,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:12:13,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:13,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 95 transitions, 740 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:13,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:13,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:13,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:14,282 INFO L124 PetriNetUnfolderBase]: 1500/2358 cut-off events. [2024-06-27 20:12:14,282 INFO L125 PetriNetUnfolderBase]: For 22613/22613 co-relation queries the response was YES. [2024-06-27 20:12:14,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11518 conditions, 2358 events. 1500/2358 cut-off events. For 22613/22613 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11553 event pairs, 525 based on Foata normal form. 1/2358 useless extension candidates. Maximal degree in co-relation 11484. Up to 2226 conditions per place. [2024-06-27 20:12:14,296 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 90 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2024-06-27 20:12:14,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 103 transitions, 956 flow [2024-06-27 20:12:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:12:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:12:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-27 20:12:14,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-27 20:12:14,297 INFO L175 Difference]: Start difference. First operand has 83 places, 95 transitions, 740 flow. Second operand 5 states and 91 transitions. [2024-06-27 20:12:14,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 103 transitions, 956 flow [2024-06-27 20:12:14,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 103 transitions, 870 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:14,312 INFO L231 Difference]: Finished difference. Result has 82 places, 95 transitions, 676 flow [2024-06-27 20:12:14,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=676, PETRI_PLACES=82, PETRI_TRANSITIONS=95} [2024-06-27 20:12:14,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-27 20:12:14,313 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 95 transitions, 676 flow [2024-06-27 20:12:14,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:14,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:14,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:14,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:12:14,314 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)] === [2024-06-27 20:12:14,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:14,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2042048099, now seen corresponding path program 1 times [2024-06-27 20:12:14,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:14,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446902308] [2024-06-27 20:12:14,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:14,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:15,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:15,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446902308] [2024-06-27 20:12:15,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446902308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:15,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:15,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:12:15,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742564001] [2024-06-27 20:12:15,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:15,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:12:15,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:15,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:12:15,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:12:15,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:15,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 95 transitions, 676 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:15,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:15,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:15,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:15,725 INFO L124 PetriNetUnfolderBase]: 1709/2572 cut-off events. [2024-06-27 20:12:15,725 INFO L125 PetriNetUnfolderBase]: For 28978/28978 co-relation queries the response was YES. [2024-06-27 20:12:15,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12786 conditions, 2572 events. 1709/2572 cut-off events. For 28978/28978 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12113 event pairs, 591 based on Foata normal form. 3/2574 useless extension candidates. Maximal degree in co-relation 12751. Up to 2450 conditions per place. [2024-06-27 20:12:15,740 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 107 selfloop transitions, 27 changer transitions 0/138 dead transitions. [2024-06-27 20:12:15,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 138 transitions, 1236 flow [2024-06-27 20:12:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:12:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:12:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:12:15,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-27 20:12:15,741 INFO L175 Difference]: Start difference. First operand has 82 places, 95 transitions, 676 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:12:15,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 138 transitions, 1236 flow [2024-06-27 20:12:15,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 138 transitions, 1214 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:15,758 INFO L231 Difference]: Finished difference. Result has 88 places, 106 transitions, 874 flow [2024-06-27 20:12:15,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=874, PETRI_PLACES=88, PETRI_TRANSITIONS=106} [2024-06-27 20:12:15,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-27 20:12:15,759 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 106 transitions, 874 flow [2024-06-27 20:12:15,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:15,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:15,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:15,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:12:15,759 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)] === [2024-06-27 20:12:15,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:15,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2042198046, now seen corresponding path program 1 times [2024-06-27 20:12:15,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:15,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435219168] [2024-06-27 20:12:15,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:15,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:16,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:16,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435219168] [2024-06-27 20:12:16,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435219168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:16,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:16,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:12:16,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855686005] [2024-06-27 20:12:16,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:16,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:12:16,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:12:16,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:12:16,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:16,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 106 transitions, 874 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:16,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:16,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:16,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:17,052 INFO L124 PetriNetUnfolderBase]: 1745/2626 cut-off events. [2024-06-27 20:12:17,053 INFO L125 PetriNetUnfolderBase]: For 35127/35127 co-relation queries the response was YES. [2024-06-27 20:12:17,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13931 conditions, 2626 events. 1745/2626 cut-off events. For 35127/35127 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12399 event pairs, 563 based on Foata normal form. 6/2631 useless extension candidates. Maximal degree in co-relation 13894. Up to 2454 conditions per place. [2024-06-27 20:12:17,070 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 110 selfloop transitions, 27 changer transitions 0/141 dead transitions. [2024-06-27 20:12:17,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 141 transitions, 1348 flow [2024-06-27 20:12:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:12:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:12:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:12:17,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 20:12:17,073 INFO L175 Difference]: Start difference. First operand has 88 places, 106 transitions, 874 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:12:17,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 141 transitions, 1348 flow [2024-06-27 20:12:17,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 141 transitions, 1265 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 20:12:17,103 INFO L231 Difference]: Finished difference. Result has 93 places, 111 transitions, 927 flow [2024-06-27 20:12:17,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=927, PETRI_PLACES=93, PETRI_TRANSITIONS=111} [2024-06-27 20:12:17,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-27 20:12:17,104 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 111 transitions, 927 flow [2024-06-27 20:12:17,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:17,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:17,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:17,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:12:17,105 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)] === [2024-06-27 20:12:17,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:17,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1652862348, now seen corresponding path program 2 times [2024-06-27 20:12:17,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:17,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961251299] [2024-06-27 20:12:17,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:17,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:17,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:17,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961251299] [2024-06-27 20:12:17,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961251299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:17,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:17,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:12:17,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213514098] [2024-06-27 20:12:17,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:17,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:12:17,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:17,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:12:17,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:12:17,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:17,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 111 transitions, 927 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:17,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:17,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:17,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:18,436 INFO L124 PetriNetUnfolderBase]: 1771/2671 cut-off events. [2024-06-27 20:12:18,436 INFO L125 PetriNetUnfolderBase]: For 39682/39686 co-relation queries the response was YES. [2024-06-27 20:12:18,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14933 conditions, 2671 events. 1771/2671 cut-off events. For 39682/39686 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12790 event pairs, 549 based on Foata normal form. 7/2677 useless extension candidates. Maximal degree in co-relation 14894. Up to 2415 conditions per place. [2024-06-27 20:12:18,474 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 114 selfloop transitions, 52 changer transitions 0/170 dead transitions. [2024-06-27 20:12:18,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 170 transitions, 1779 flow [2024-06-27 20:12:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:12:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:12:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:12:18,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 20:12:18,478 INFO L175 Difference]: Start difference. First operand has 93 places, 111 transitions, 927 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:12:18,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 170 transitions, 1779 flow [2024-06-27 20:12:18,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 170 transitions, 1625 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:18,505 INFO L231 Difference]: Finished difference. Result has 98 places, 141 transitions, 1310 flow [2024-06-27 20:12:18,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1310, PETRI_PLACES=98, PETRI_TRANSITIONS=141} [2024-06-27 20:12:18,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-27 20:12:18,506 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 141 transitions, 1310 flow [2024-06-27 20:12:18,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:18,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:18,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:18,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:12:18,507 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)] === [2024-06-27 20:12:18,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:18,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2108676910, now seen corresponding path program 3 times [2024-06-27 20:12:18,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:18,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040183660] [2024-06-27 20:12:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:18,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:19,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:19,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040183660] [2024-06-27 20:12:19,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040183660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:19,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:19,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:12:19,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170872406] [2024-06-27 20:12:19,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:19,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:12:19,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:19,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:12:19,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:12:19,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:19,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 141 transitions, 1310 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:19,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:19,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:19,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:19,855 INFO L124 PetriNetUnfolderBase]: 1807/2714 cut-off events. [2024-06-27 20:12:19,855 INFO L125 PetriNetUnfolderBase]: For 45011/45015 co-relation queries the response was YES. [2024-06-27 20:12:19,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16130 conditions, 2714 events. 1807/2714 cut-off events. For 45011/45015 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12881 event pairs, 557 based on Foata normal form. 10/2723 useless extension candidates. Maximal degree in co-relation 16087. Up to 2401 conditions per place. [2024-06-27 20:12:19,872 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 104 selfloop transitions, 67 changer transitions 0/175 dead transitions. [2024-06-27 20:12:19,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 175 transitions, 1931 flow [2024-06-27 20:12:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:12:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:12:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:12:19,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-27 20:12:19,874 INFO L175 Difference]: Start difference. First operand has 98 places, 141 transitions, 1310 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:12:19,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 175 transitions, 1931 flow [2024-06-27 20:12:19,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 175 transitions, 1842 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-27 20:12:19,913 INFO L231 Difference]: Finished difference. Result has 104 places, 149 transitions, 1529 flow [2024-06-27 20:12:19,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1529, PETRI_PLACES=104, PETRI_TRANSITIONS=149} [2024-06-27 20:12:19,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-27 20:12:19,914 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 149 transitions, 1529 flow [2024-06-27 20:12:19,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:19,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:19,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:19,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:12:19,916 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)] === [2024-06-27 20:12:19,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1660480908, now seen corresponding path program 4 times [2024-06-27 20:12:19,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:19,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83023416] [2024-06-27 20:12:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:19,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:20,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:20,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83023416] [2024-06-27 20:12:20,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83023416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:20,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:20,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:12:20,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908179896] [2024-06-27 20:12:20,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:20,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:12:20,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:20,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:12:20,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:12:20,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:20,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 149 transitions, 1529 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:20,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:20,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:20,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:21,221 INFO L124 PetriNetUnfolderBase]: 1819/2732 cut-off events. [2024-06-27 20:12:21,221 INFO L125 PetriNetUnfolderBase]: For 50024/50028 co-relation queries the response was YES. [2024-06-27 20:12:21,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16974 conditions, 2732 events. 1819/2732 cut-off events. For 50024/50028 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12978 event pairs, 557 based on Foata normal form. 10/2741 useless extension candidates. Maximal degree in co-relation 16929. Up to 2419 conditions per place. [2024-06-27 20:12:21,237 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 120 selfloop transitions, 58 changer transitions 0/182 dead transitions. [2024-06-27 20:12:21,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 182 transitions, 2154 flow [2024-06-27 20:12:21,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:12:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:12:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:12:21,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-27 20:12:21,239 INFO L175 Difference]: Start difference. First operand has 104 places, 149 transitions, 1529 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:12:21,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 182 transitions, 2154 flow [2024-06-27 20:12:21,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 182 transitions, 1910 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:21,286 INFO L231 Difference]: Finished difference. Result has 106 places, 153 transitions, 1503 flow [2024-06-27 20:12:21,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1503, PETRI_PLACES=106, PETRI_TRANSITIONS=153} [2024-06-27 20:12:21,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-27 20:12:21,288 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 153 transitions, 1503 flow [2024-06-27 20:12:21,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:21,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:21,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:21,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:12:21,289 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:21,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:21,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1447461146, now seen corresponding path program 1 times [2024-06-27 20:12:21,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:21,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329958942] [2024-06-27 20:12:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:21,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:21,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:21,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329958942] [2024-06-27 20:12:21,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329958942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:21,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:21,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:21,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427198155] [2024-06-27 20:12:21,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:21,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:21,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:21,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:21,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:21,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:21,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 153 transitions, 1503 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:21,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:21,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:21,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:22,213 INFO L124 PetriNetUnfolderBase]: 1606/2510 cut-off events. [2024-06-27 20:12:22,214 INFO L125 PetriNetUnfolderBase]: For 44371/44371 co-relation queries the response was YES. [2024-06-27 20:12:22,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15599 conditions, 2510 events. 1606/2510 cut-off events. For 44371/44371 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12315 event pairs, 467 based on Foata normal form. 2/2511 useless extension candidates. Maximal degree in co-relation 15553. Up to 2374 conditions per place. [2024-06-27 20:12:22,231 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 150 selfloop transitions, 11 changer transitions 0/166 dead transitions. [2024-06-27 20:12:22,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 166 transitions, 1877 flow [2024-06-27 20:12:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:12:22,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:12:22,232 INFO L175 Difference]: Start difference. First operand has 106 places, 153 transitions, 1503 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:12:22,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 166 transitions, 1877 flow [2024-06-27 20:12:22,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 166 transitions, 1683 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:22,268 INFO L231 Difference]: Finished difference. Result has 106 places, 156 transitions, 1371 flow [2024-06-27 20:12:22,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1371, PETRI_PLACES=106, PETRI_TRANSITIONS=156} [2024-06-27 20:12:22,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-27 20:12:22,268 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 156 transitions, 1371 flow [2024-06-27 20:12:22,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:22,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:22,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:22,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:12:22,269 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)] === [2024-06-27 20:12:22,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:22,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1521668514, now seen corresponding path program 1 times [2024-06-27 20:12:22,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:22,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914667404] [2024-06-27 20:12:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:22,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:22,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:22,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914667404] [2024-06-27 20:12:22,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914667404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:22,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:22,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:12:22,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645603088] [2024-06-27 20:12:22,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:22,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:12:22,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:22,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:12:22,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:12:23,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:23,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 156 transitions, 1371 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:23,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:23,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:23,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:23,618 INFO L124 PetriNetUnfolderBase]: 1749/2666 cut-off events. [2024-06-27 20:12:23,618 INFO L125 PetriNetUnfolderBase]: For 55616/55618 co-relation queries the response was YES. [2024-06-27 20:12:23,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17034 conditions, 2666 events. 1749/2666 cut-off events. For 55616/55618 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12939 event pairs, 350 based on Foata normal form. 6/2671 useless extension candidates. Maximal degree in co-relation 16987. Up to 2385 conditions per place. [2024-06-27 20:12:23,632 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 143 selfloop transitions, 15 changer transitions 0/189 dead transitions. [2024-06-27 20:12:23,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 189 transitions, 1815 flow [2024-06-27 20:12:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:12:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:12:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:12:23,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:12:23,633 INFO L175 Difference]: Start difference. First operand has 106 places, 156 transitions, 1371 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:12:23,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 189 transitions, 1815 flow [2024-06-27 20:12:23,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 189 transitions, 1775 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:23,678 INFO L231 Difference]: Finished difference. Result has 110 places, 158 transitions, 1422 flow [2024-06-27 20:12:23,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1422, PETRI_PLACES=110, PETRI_TRANSITIONS=158} [2024-06-27 20:12:23,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-27 20:12:23,696 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 158 transitions, 1422 flow [2024-06-27 20:12:23,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:23,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:23,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:23,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:12:23,697 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)] === [2024-06-27 20:12:23,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:23,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1231845064, now seen corresponding path program 2 times [2024-06-27 20:12:23,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:23,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277145044] [2024-06-27 20:12:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:23,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:24,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:24,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277145044] [2024-06-27 20:12:24,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277145044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:24,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:24,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:12:24,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603791375] [2024-06-27 20:12:24,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:24,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:12:24,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:12:24,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:12:24,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:24,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 158 transitions, 1422 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:24,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:24,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:24,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:25,246 INFO L124 PetriNetUnfolderBase]: 1766/2693 cut-off events. [2024-06-27 20:12:25,246 INFO L125 PetriNetUnfolderBase]: For 61137/61139 co-relation queries the response was YES. [2024-06-27 20:12:25,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17567 conditions, 2693 events. 1766/2693 cut-off events. For 61137/61139 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13111 event pairs, 473 based on Foata normal form. 6/2698 useless extension candidates. Maximal degree in co-relation 17519. Up to 2438 conditions per place. [2024-06-27 20:12:25,265 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 143 selfloop transitions, 16 changer transitions 0/190 dead transitions. [2024-06-27 20:12:25,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 190 transitions, 1870 flow [2024-06-27 20:12:25,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:12:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:12:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:12:25,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:12:25,266 INFO L175 Difference]: Start difference. First operand has 110 places, 158 transitions, 1422 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:12:25,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 190 transitions, 1870 flow [2024-06-27 20:12:25,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 190 transitions, 1797 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:25,312 INFO L231 Difference]: Finished difference. Result has 112 places, 160 transitions, 1446 flow [2024-06-27 20:12:25,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1446, PETRI_PLACES=112, PETRI_TRANSITIONS=160} [2024-06-27 20:12:25,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-27 20:12:25,313 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 160 transitions, 1446 flow [2024-06-27 20:12:25,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:25,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:25,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:25,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:12:25,313 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)] === [2024-06-27 20:12:25,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:25,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1524530434, now seen corresponding path program 1 times [2024-06-27 20:12:25,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:25,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114222630] [2024-06-27 20:12:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:25,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:26,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:26,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114222630] [2024-06-27 20:12:26,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114222630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:26,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:26,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:26,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562131880] [2024-06-27 20:12:26,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:26,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:26,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:26,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:26,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:26,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:26,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 160 transitions, 1446 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:26,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:26,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:26,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:27,094 INFO L124 PetriNetUnfolderBase]: 1862/2803 cut-off events. [2024-06-27 20:12:27,094 INFO L125 PetriNetUnfolderBase]: For 67326/67326 co-relation queries the response was YES. [2024-06-27 20:12:27,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18494 conditions, 2803 events. 1862/2803 cut-off events. For 67326/67326 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13354 event pairs, 480 based on Foata normal form. 3/2805 useless extension candidates. Maximal degree in co-relation 18445. Up to 2664 conditions per place. [2024-06-27 20:12:27,113 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 165 selfloop transitions, 31 changer transitions 0/200 dead transitions. [2024-06-27 20:12:27,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 200 transitions, 2152 flow [2024-06-27 20:12:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:27,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:12:27,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:12:27,115 INFO L175 Difference]: Start difference. First operand has 112 places, 160 transitions, 1446 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:12:27,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 200 transitions, 2152 flow [2024-06-27 20:12:27,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 200 transitions, 2073 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:27,170 INFO L231 Difference]: Finished difference. Result has 115 places, 164 transitions, 1538 flow [2024-06-27 20:12:27,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1538, PETRI_PLACES=115, PETRI_TRANSITIONS=164} [2024-06-27 20:12:27,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-27 20:12:27,171 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 164 transitions, 1538 flow [2024-06-27 20:12:27,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:27,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:27,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:27,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:12:27,171 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)] === [2024-06-27 20:12:27,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:27,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1639816644, now seen corresponding path program 3 times [2024-06-27 20:12:27,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:27,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274057649] [2024-06-27 20:12:27,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:27,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:27,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:27,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274057649] [2024-06-27 20:12:27,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274057649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:27,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:27,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:12:27,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66348179] [2024-06-27 20:12:27,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:27,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:12:27,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:28,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:12:28,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:12:28,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:28,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 164 transitions, 1538 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:28,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:28,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:28,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:28,708 INFO L124 PetriNetUnfolderBase]: 1801/2749 cut-off events. [2024-06-27 20:12:28,708 INFO L125 PetriNetUnfolderBase]: For 73812/73814 co-relation queries the response was YES. [2024-06-27 20:12:28,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18751 conditions, 2749 events. 1801/2749 cut-off events. For 73812/73814 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13429 event pairs, 448 based on Foata normal form. 6/2754 useless extension candidates. Maximal degree in co-relation 18701. Up to 2494 conditions per place. [2024-06-27 20:12:28,727 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 147 selfloop transitions, 16 changer transitions 0/195 dead transitions. [2024-06-27 20:12:28,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 195 transitions, 2003 flow [2024-06-27 20:12:28,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:12:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:12:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:12:28,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 20:12:28,729 INFO L175 Difference]: Start difference. First operand has 115 places, 164 transitions, 1538 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:12:28,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 195 transitions, 2003 flow [2024-06-27 20:12:28,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 195 transitions, 1862 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:28,776 INFO L231 Difference]: Finished difference. Result has 117 places, 168 transitions, 1517 flow [2024-06-27 20:12:28,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1517, PETRI_PLACES=117, PETRI_TRANSITIONS=168} [2024-06-27 20:12:28,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-27 20:12:28,777 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 168 transitions, 1517 flow [2024-06-27 20:12:28,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:28,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:28,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:28,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:12:28,778 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)] === [2024-06-27 20:12:28,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:28,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1116369196, now seen corresponding path program 1 times [2024-06-27 20:12:28,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:28,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339602635] [2024-06-27 20:12:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:28,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:29,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:29,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339602635] [2024-06-27 20:12:29,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339602635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:29,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:29,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:29,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927652197] [2024-06-27 20:12:29,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:29,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:29,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:29,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:29,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:29,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 168 transitions, 1517 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:29,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:29,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:29,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:30,277 INFO L124 PetriNetUnfolderBase]: 1907/2872 cut-off events. [2024-06-27 20:12:30,277 INFO L125 PetriNetUnfolderBase]: For 82092/82092 co-relation queries the response was YES. [2024-06-27 20:12:30,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19655 conditions, 2872 events. 1907/2872 cut-off events. For 82092/82092 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13786 event pairs, 478 based on Foata normal form. 6/2877 useless extension candidates. Maximal degree in co-relation 19603. Up to 2731 conditions per place. [2024-06-27 20:12:30,296 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 173 selfloop transitions, 29 changer transitions 0/206 dead transitions. [2024-06-27 20:12:30,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 206 transitions, 2187 flow [2024-06-27 20:12:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:30,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:12:30,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-27 20:12:30,298 INFO L175 Difference]: Start difference. First operand has 117 places, 168 transitions, 1517 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:12:30,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 206 transitions, 2187 flow [2024-06-27 20:12:30,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 206 transitions, 2100 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:30,362 INFO L231 Difference]: Finished difference. Result has 123 places, 173 transitions, 1609 flow [2024-06-27 20:12:30,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1609, PETRI_PLACES=123, PETRI_TRANSITIONS=173} [2024-06-27 20:12:30,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-27 20:12:30,363 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 173 transitions, 1609 flow [2024-06-27 20:12:30,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:30,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:30,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:30,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:12:30,363 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)] === [2024-06-27 20:12:30,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:30,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1640001094, now seen corresponding path program 2 times [2024-06-27 20:12:30,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:30,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465668184] [2024-06-27 20:12:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:30,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:31,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:31,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465668184] [2024-06-27 20:12:31,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465668184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:31,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:31,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:31,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470253008] [2024-06-27 20:12:31,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:31,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:31,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:31,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:31,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:31,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:31,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 173 transitions, 1609 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:31,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:31,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:31,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:31,934 INFO L124 PetriNetUnfolderBase]: 1925/2906 cut-off events. [2024-06-27 20:12:31,934 INFO L125 PetriNetUnfolderBase]: For 86467/86467 co-relation queries the response was YES. [2024-06-27 20:12:31,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20369 conditions, 2906 events. 1925/2906 cut-off events. For 86467/86467 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14016 event pairs, 473 based on Foata normal form. 3/2908 useless extension candidates. Maximal degree in co-relation 20314. Up to 2645 conditions per place. [2024-06-27 20:12:31,953 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 147 selfloop transitions, 58 changer transitions 0/209 dead transitions. [2024-06-27 20:12:31,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 209 transitions, 2305 flow [2024-06-27 20:12:31,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:12:31,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:12:31,955 INFO L175 Difference]: Start difference. First operand has 123 places, 173 transitions, 1609 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:12:31,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 209 transitions, 2305 flow [2024-06-27 20:12:32,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 209 transitions, 2201 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:32,023 INFO L231 Difference]: Finished difference. Result has 128 places, 177 transitions, 1744 flow [2024-06-27 20:12:32,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1744, PETRI_PLACES=128, PETRI_TRANSITIONS=177} [2024-06-27 20:12:32,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-27 20:12:32,024 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 177 transitions, 1744 flow [2024-06-27 20:12:32,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:32,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:32,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:32,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:12:32,025 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:32,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:32,025 INFO L85 PathProgramCache]: Analyzing trace with hash -755806953, now seen corresponding path program 1 times [2024-06-27 20:12:32,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:32,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698398405] [2024-06-27 20:12:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:32,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:32,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:32,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698398405] [2024-06-27 20:12:32,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698398405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:32,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:32,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:32,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183024487] [2024-06-27 20:12:32,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:32,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:32,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:32,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:32,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:32,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 177 transitions, 1744 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-27 20:12:32,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:32,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:32,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:33,035 INFO L124 PetriNetUnfolderBase]: 1935/2927 cut-off events. [2024-06-27 20:12:33,035 INFO L125 PetriNetUnfolderBase]: For 93449/93449 co-relation queries the response was YES. [2024-06-27 20:12:33,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21013 conditions, 2927 events. 1935/2927 cut-off events. For 93449/93449 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14185 event pairs, 486 based on Foata normal form. 2/2928 useless extension candidates. Maximal degree in co-relation 20957. Up to 2817 conditions per place. [2024-06-27 20:12:33,056 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 173 selfloop transitions, 22 changer transitions 0/199 dead transitions. [2024-06-27 20:12:33,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 199 transitions, 2307 flow [2024-06-27 20:12:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-27 20:12:33,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 20:12:33,057 INFO L175 Difference]: Start difference. First operand has 128 places, 177 transitions, 1744 flow. Second operand 6 states and 111 transitions. [2024-06-27 20:12:33,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 199 transitions, 2307 flow [2024-06-27 20:12:33,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 199 transitions, 2088 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:33,123 INFO L231 Difference]: Finished difference. Result has 127 places, 182 transitions, 1649 flow [2024-06-27 20:12:33,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1649, PETRI_PLACES=127, PETRI_TRANSITIONS=182} [2024-06-27 20:12:33,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-27 20:12:33,124 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 182 transitions, 1649 flow [2024-06-27 20:12:33,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-27 20:12:33,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:33,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:33,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:12:33,124 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)] === [2024-06-27 20:12:33,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:33,125 INFO L85 PathProgramCache]: Analyzing trace with hash 64515524, now seen corresponding path program 4 times [2024-06-27 20:12:33,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:33,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570262173] [2024-06-27 20:12:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:33,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:33,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:33,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570262173] [2024-06-27 20:12:33,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570262173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:33,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:33,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:12:33,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584882497] [2024-06-27 20:12:33,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:33,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:12:33,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:33,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:12:33,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:12:34,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:34,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 182 transitions, 1649 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:34,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:34,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:34,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:34,552 INFO L124 PetriNetUnfolderBase]: 1846/2828 cut-off events. [2024-06-27 20:12:34,552 INFO L125 PetriNetUnfolderBase]: For 96068/96074 co-relation queries the response was YES. [2024-06-27 20:12:34,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20113 conditions, 2828 events. 1846/2828 cut-off events. For 96068/96074 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13951 event pairs, 451 based on Foata normal form. 10/2837 useless extension candidates. Maximal degree in co-relation 20056. Up to 2526 conditions per place. [2024-06-27 20:12:34,574 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 151 selfloop transitions, 23 changer transitions 0/210 dead transitions. [2024-06-27 20:12:34,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 210 transitions, 2138 flow [2024-06-27 20:12:34,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:12:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:12:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:12:34,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 20:12:34,575 INFO L175 Difference]: Start difference. First operand has 127 places, 182 transitions, 1649 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:12:34,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 210 transitions, 2138 flow [2024-06-27 20:12:34,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 210 transitions, 2087 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 20:12:34,647 INFO L231 Difference]: Finished difference. Result has 133 places, 186 transitions, 1742 flow [2024-06-27 20:12:34,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1598, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1742, PETRI_PLACES=133, PETRI_TRANSITIONS=186} [2024-06-27 20:12:34,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-27 20:12:34,652 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 186 transitions, 1742 flow [2024-06-27 20:12:34,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:34,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:34,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:34,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:12:34,653 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)] === [2024-06-27 20:12:34,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:34,653 INFO L85 PathProgramCache]: Analyzing trace with hash 301172252, now seen corresponding path program 2 times [2024-06-27 20:12:34,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:34,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587296022] [2024-06-27 20:12:34,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:34,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:35,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:35,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587296022] [2024-06-27 20:12:35,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587296022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:35,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:35,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:35,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546768141] [2024-06-27 20:12:35,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:35,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:35,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:35,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:35,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:35,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:35,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 186 transitions, 1742 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:35,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:35,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:35,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:36,221 INFO L124 PetriNetUnfolderBase]: 1968/2974 cut-off events. [2024-06-27 20:12:36,221 INFO L125 PetriNetUnfolderBase]: For 107057/107061 co-relation queries the response was YES. [2024-06-27 20:12:36,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21493 conditions, 2974 events. 1968/2974 cut-off events. For 107057/107061 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14428 event pairs, 427 based on Foata normal form. 10/2983 useless extension candidates. Maximal degree in co-relation 21434. Up to 2574 conditions per place. [2024-06-27 20:12:36,242 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 148 selfloop transitions, 73 changer transitions 0/225 dead transitions. [2024-06-27 20:12:36,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 225 transitions, 2654 flow [2024-06-27 20:12:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:36,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:12:36,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:12:36,244 INFO L175 Difference]: Start difference. First operand has 133 places, 186 transitions, 1742 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:12:36,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 225 transitions, 2654 flow [2024-06-27 20:12:36,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 225 transitions, 2543 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:36,338 INFO L231 Difference]: Finished difference. Result has 137 places, 192 transitions, 1963 flow [2024-06-27 20:12:36,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1963, PETRI_PLACES=137, PETRI_TRANSITIONS=192} [2024-06-27 20:12:36,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-27 20:12:36,339 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 192 transitions, 1963 flow [2024-06-27 20:12:36,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:36,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:36,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:36,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:12:36,340 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:36,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:36,340 INFO L85 PathProgramCache]: Analyzing trace with hash 422411544, now seen corresponding path program 3 times [2024-06-27 20:12:36,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:36,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783364236] [2024-06-27 20:12:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:36,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:37,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:37,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783364236] [2024-06-27 20:12:37,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783364236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:37,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:37,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:37,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861918786] [2024-06-27 20:12:37,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:37,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:37,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:37,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:37,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:37,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 192 transitions, 1963 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:37,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:37,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:37,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:37,710 INFO L124 PetriNetUnfolderBase]: 1996/3023 cut-off events. [2024-06-27 20:12:37,711 INFO L125 PetriNetUnfolderBase]: For 114939/114943 co-relation queries the response was YES. [2024-06-27 20:12:37,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22395 conditions, 3023 events. 1996/3023 cut-off events. For 114939/114943 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14785 event pairs, 471 based on Foata normal form. 10/3032 useless extension candidates. Maximal degree in co-relation 22335. Up to 2728 conditions per place. [2024-06-27 20:12:37,734 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 156 selfloop transitions, 65 changer transitions 0/225 dead transitions. [2024-06-27 20:12:37,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 225 transitions, 2687 flow [2024-06-27 20:12:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:12:37,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 20:12:37,736 INFO L175 Difference]: Start difference. First operand has 137 places, 192 transitions, 1963 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:12:37,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 225 transitions, 2687 flow [2024-06-27 20:12:37,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 225 transitions, 2494 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:37,816 INFO L231 Difference]: Finished difference. Result has 141 places, 195 transitions, 2006 flow [2024-06-27 20:12:37,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2006, PETRI_PLACES=141, PETRI_TRANSITIONS=195} [2024-06-27 20:12:37,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-27 20:12:37,825 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 195 transitions, 2006 flow [2024-06-27 20:12:37,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:37,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:37,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:37,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:12:37,826 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:37,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:37,826 INFO L85 PathProgramCache]: Analyzing trace with hash 422411296, now seen corresponding path program 3 times [2024-06-27 20:12:37,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:37,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087750674] [2024-06-27 20:12:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:37,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:38,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:38,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087750674] [2024-06-27 20:12:38,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087750674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:38,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:38,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:38,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686287477] [2024-06-27 20:12:38,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:38,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:38,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:38,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:38,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:38,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:38,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 195 transitions, 2006 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:38,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:38,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:38,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:39,375 INFO L124 PetriNetUnfolderBase]: 2022/3076 cut-off events. [2024-06-27 20:12:39,376 INFO L125 PetriNetUnfolderBase]: For 119334/119338 co-relation queries the response was YES. [2024-06-27 20:12:39,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22977 conditions, 3076 events. 2022/3076 cut-off events. For 119334/119338 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15228 event pairs, 471 based on Foata normal form. 7/3082 useless extension candidates. Maximal degree in co-relation 22915. Up to 2599 conditions per place. [2024-06-27 20:12:39,396 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 135 selfloop transitions, 104 changer transitions 0/243 dead transitions. [2024-06-27 20:12:39,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 243 transitions, 3064 flow [2024-06-27 20:12:39,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:39,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 20:12:39,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-27 20:12:39,397 INFO L175 Difference]: Start difference. First operand has 141 places, 195 transitions, 2006 flow. Second operand 11 states and 208 transitions. [2024-06-27 20:12:39,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 243 transitions, 3064 flow [2024-06-27 20:12:39,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 243 transitions, 2872 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:39,479 INFO L231 Difference]: Finished difference. Result has 146 places, 204 transitions, 2297 flow [2024-06-27 20:12:39,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2297, PETRI_PLACES=146, PETRI_TRANSITIONS=204} [2024-06-27 20:12:39,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-27 20:12:39,480 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 204 transitions, 2297 flow [2024-06-27 20:12:39,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:39,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:39,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:39,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:12:39,481 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:39,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1811896586, now seen corresponding path program 4 times [2024-06-27 20:12:39,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:39,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37589705] [2024-06-27 20:12:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:39,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:40,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:40,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37589705] [2024-06-27 20:12:40,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37589705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:40,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:40,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:40,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467397717] [2024-06-27 20:12:40,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:40,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:40,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:40,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:40,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:40,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:40,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 204 transitions, 2297 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:40,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:40,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:40,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:40,933 INFO L124 PetriNetUnfolderBase]: 2050/3120 cut-off events. [2024-06-27 20:12:40,933 INFO L125 PetriNetUnfolderBase]: For 129866/129870 co-relation queries the response was YES. [2024-06-27 20:12:40,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23880 conditions, 3120 events. 2050/3120 cut-off events. For 129866/129870 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15460 event pairs, 471 based on Foata normal form. 10/3129 useless extension candidates. Maximal degree in co-relation 23816. Up to 2861 conditions per place. [2024-06-27 20:12:40,960 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 182 selfloop transitions, 51 changer transitions 0/237 dead transitions. [2024-06-27 20:12:40,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 237 transitions, 3043 flow [2024-06-27 20:12:40,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:40,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:12:40,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-27 20:12:40,970 INFO L175 Difference]: Start difference. First operand has 146 places, 204 transitions, 2297 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:12:40,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 237 transitions, 3043 flow [2024-06-27 20:12:41,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 237 transitions, 2811 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:41,079 INFO L231 Difference]: Finished difference. Result has 149 places, 207 transitions, 2263 flow [2024-06-27 20:12:41,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2263, PETRI_PLACES=149, PETRI_TRANSITIONS=207} [2024-06-27 20:12:41,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-27 20:12:41,081 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 207 transitions, 2263 flow [2024-06-27 20:12:41,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:41,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:41,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:41,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:12:41,081 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)] === [2024-06-27 20:12:41,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:41,082 INFO L85 PathProgramCache]: Analyzing trace with hash 64700222, now seen corresponding path program 5 times [2024-06-27 20:12:41,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:41,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669163658] [2024-06-27 20:12:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:41,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:41,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:41,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669163658] [2024-06-27 20:12:41,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669163658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:41,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:41,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:41,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523715277] [2024-06-27 20:12:41,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:41,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:41,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:41,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:41,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:41,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 207 transitions, 2263 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:41,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:41,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:41,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:42,552 INFO L124 PetriNetUnfolderBase]: 2040/3095 cut-off events. [2024-06-27 20:12:42,552 INFO L125 PetriNetUnfolderBase]: For 131427/131431 co-relation queries the response was YES. [2024-06-27 20:12:42,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23708 conditions, 3095 events. 2040/3095 cut-off events. For 131427/131431 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15221 event pairs, 469 based on Foata normal form. 10/3104 useless extension candidates. Maximal degree in co-relation 23642. Up to 2847 conditions per place. [2024-06-27 20:12:42,577 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 188 selfloop transitions, 46 changer transitions 0/238 dead transitions. [2024-06-27 20:12:42,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 238 transitions, 2999 flow [2024-06-27 20:12:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:42,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:12:42,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 20:12:42,579 INFO L175 Difference]: Start difference. First operand has 149 places, 207 transitions, 2263 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:12:42,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 238 transitions, 2999 flow [2024-06-27 20:12:42,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 238 transitions, 2772 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:42,717 INFO L231 Difference]: Finished difference. Result has 151 places, 207 transitions, 2136 flow [2024-06-27 20:12:42,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2036, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2136, PETRI_PLACES=151, PETRI_TRANSITIONS=207} [2024-06-27 20:12:42,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-27 20:12:42,718 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 207 transitions, 2136 flow [2024-06-27 20:12:42,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:42,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:42,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:42,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:12:42,718 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:42,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:42,719 INFO L85 PathProgramCache]: Analyzing trace with hash 64699974, now seen corresponding path program 4 times [2024-06-27 20:12:42,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:42,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066861250] [2024-06-27 20:12:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:42,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:43,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:43,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066861250] [2024-06-27 20:12:43,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066861250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:43,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:43,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:43,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800657648] [2024-06-27 20:12:43,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:43,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:43,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:43,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:43,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:43,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 207 transitions, 2136 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:43,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:43,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:43,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:44,341 INFO L124 PetriNetUnfolderBase]: 2034/3089 cut-off events. [2024-06-27 20:12:44,341 INFO L125 PetriNetUnfolderBase]: For 131895/131897 co-relation queries the response was YES. [2024-06-27 20:12:44,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23418 conditions, 3089 events. 2034/3089 cut-off events. For 131895/131897 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15193 event pairs, 469 based on Foata normal form. 3/3090 useless extension candidates. Maximal degree in co-relation 23352. Up to 2676 conditions per place. [2024-06-27 20:12:44,365 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 156 selfloop transitions, 77 changer transitions 0/237 dead transitions. [2024-06-27 20:12:44,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 237 transitions, 2874 flow [2024-06-27 20:12:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:12:44,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-27 20:12:44,366 INFO L175 Difference]: Start difference. First operand has 151 places, 207 transitions, 2136 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:12:44,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 237 transitions, 2874 flow [2024-06-27 20:12:44,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 237 transitions, 2650 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-27 20:12:44,497 INFO L231 Difference]: Finished difference. Result has 151 places, 207 transitions, 2075 flow [2024-06-27 20:12:44,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2075, PETRI_PLACES=151, PETRI_TRANSITIONS=207} [2024-06-27 20:12:44,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-27 20:12:44,498 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 207 transitions, 2075 flow [2024-06-27 20:12:44,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:44,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:44,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:44,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:12:44,498 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:44,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:44,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1921634521, now seen corresponding path program 2 times [2024-06-27 20:12:44,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:44,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798891757] [2024-06-27 20:12:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:44,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:44,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:44,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798891757] [2024-06-27 20:12:44,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798891757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:44,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:44,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490622568] [2024-06-27 20:12:44,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:44,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:44,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:44,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:44,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:45,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:45,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 207 transitions, 2075 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-27 20:12:45,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:45,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:45,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:45,561 INFO L124 PetriNetUnfolderBase]: 2028/3086 cut-off events. [2024-06-27 20:12:45,561 INFO L125 PetriNetUnfolderBase]: For 136349/136351 co-relation queries the response was YES. [2024-06-27 20:12:45,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23335 conditions, 3086 events. 2028/3086 cut-off events. For 136349/136351 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15230 event pairs, 493 based on Foata normal form. 2/3086 useless extension candidates. Maximal degree in co-relation 23270. Up to 2966 conditions per place. [2024-06-27 20:12:45,586 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 191 selfloop transitions, 22 changer transitions 0/217 dead transitions. [2024-06-27 20:12:45,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 217 transitions, 2535 flow [2024-06-27 20:12:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:45,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 20:12:45,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 20:12:45,587 INFO L175 Difference]: Start difference. First operand has 151 places, 207 transitions, 2075 flow. Second operand 6 states and 105 transitions. [2024-06-27 20:12:45,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 217 transitions, 2535 flow [2024-06-27 20:12:45,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 217 transitions, 2295 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 20:12:45,690 INFO L231 Difference]: Finished difference. Result has 149 places, 207 transitions, 1887 flow [2024-06-27 20:12:45,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1887, PETRI_PLACES=149, PETRI_TRANSITIONS=207} [2024-06-27 20:12:45,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-27 20:12:45,691 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 207 transitions, 1887 flow [2024-06-27 20:12:45,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-27 20:12:45,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:45,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:45,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:12:45,692 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:45,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash -305761585, now seen corresponding path program 1 times [2024-06-27 20:12:45,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:45,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431089876] [2024-06-27 20:12:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:45,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:46,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:46,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431089876] [2024-06-27 20:12:46,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431089876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:46,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:46,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:46,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820124081] [2024-06-27 20:12:46,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:46,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:46,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:46,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:46,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:46,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:46,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 207 transitions, 1887 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:46,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:46,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:46,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:46,680 INFO L124 PetriNetUnfolderBase]: 1826/2880 cut-off events. [2024-06-27 20:12:46,681 INFO L125 PetriNetUnfolderBase]: For 117932/117932 co-relation queries the response was YES. [2024-06-27 20:12:46,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20757 conditions, 2880 events. 1826/2880 cut-off events. For 117932/117932 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14662 event pairs, 404 based on Foata normal form. 2/2881 useless extension candidates. Maximal degree in co-relation 20691. Up to 2686 conditions per place. [2024-06-27 20:12:46,705 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 199 selfloop transitions, 19 changer transitions 0/223 dead transitions. [2024-06-27 20:12:46,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 223 transitions, 2459 flow [2024-06-27 20:12:46,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:46,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 20:12:46,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-27 20:12:46,707 INFO L175 Difference]: Start difference. First operand has 149 places, 207 transitions, 1887 flow. Second operand 6 states and 113 transitions. [2024-06-27 20:12:46,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 223 transitions, 2459 flow [2024-06-27 20:12:46,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 223 transitions, 2403 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:46,784 INFO L231 Difference]: Finished difference. Result has 150 places, 210 transitions, 1913 flow [2024-06-27 20:12:46,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1913, PETRI_PLACES=150, PETRI_TRANSITIONS=210} [2024-06-27 20:12:46,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-27 20:12:46,785 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 210 transitions, 1913 flow [2024-06-27 20:12:46,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:46,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:46,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:46,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:12:46,786 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:46,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:46,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1921628569, now seen corresponding path program 2 times [2024-06-27 20:12:46,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:46,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958092550] [2024-06-27 20:12:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:46,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:47,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:47,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958092550] [2024-06-27 20:12:47,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958092550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:47,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:47,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:12:47,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327111057] [2024-06-27 20:12:47,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:47,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:12:47,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:47,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:12:47,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:12:47,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:12:47,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 210 transitions, 1913 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:47,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:47,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:12:47,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:47,652 INFO L124 PetriNetUnfolderBase]: 1795/2830 cut-off events. [2024-06-27 20:12:47,653 INFO L125 PetriNetUnfolderBase]: For 121802/121802 co-relation queries the response was YES. [2024-06-27 20:12:47,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20646 conditions, 2830 events. 1795/2830 cut-off events. For 121802/121802 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14348 event pairs, 402 based on Foata normal form. 1/2830 useless extension candidates. Maximal degree in co-relation 20579. Up to 2669 conditions per place. [2024-06-27 20:12:47,673 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 203 selfloop transitions, 11 changer transitions 0/219 dead transitions. [2024-06-27 20:12:47,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 219 transitions, 2363 flow [2024-06-27 20:12:47,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:12:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:12:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 20:12:47,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 20:12:47,675 INFO L175 Difference]: Start difference. First operand has 150 places, 210 transitions, 1913 flow. Second operand 6 states and 105 transitions. [2024-06-27 20:12:47,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 219 transitions, 2363 flow [2024-06-27 20:12:47,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 219 transitions, 2334 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:12:47,774 INFO L231 Difference]: Finished difference. Result has 153 places, 210 transitions, 1912 flow [2024-06-27 20:12:47,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1912, PETRI_PLACES=153, PETRI_TRANSITIONS=210} [2024-06-27 20:12:47,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-27 20:12:47,774 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 210 transitions, 1912 flow [2024-06-27 20:12:47,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:47,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:47,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:47,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:12:47,775 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)] === [2024-06-27 20:12:47,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:47,775 INFO L85 PathProgramCache]: Analyzing trace with hash -72915566, now seen corresponding path program 1 times [2024-06-27 20:12:47,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:47,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119227124] [2024-06-27 20:12:47,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:47,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:48,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:48,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119227124] [2024-06-27 20:12:48,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119227124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:48,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:48,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:48,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786299064] [2024-06-27 20:12:48,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:48,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:48,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:48,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:48,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:48,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:48,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 210 transitions, 1912 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:48,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:48,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:48,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:49,296 INFO L124 PetriNetUnfolderBase]: 2053/3122 cut-off events. [2024-06-27 20:12:49,297 INFO L125 PetriNetUnfolderBase]: For 157528/157528 co-relation queries the response was YES. [2024-06-27 20:12:49,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23953 conditions, 3122 events. 2053/3122 cut-off events. For 157528/157528 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15342 event pairs, 301 based on Foata normal form. 6/3127 useless extension candidates. Maximal degree in co-relation 23885. Up to 2873 conditions per place. [2024-06-27 20:12:49,320 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 220 selfloop transitions, 32 changer transitions 0/256 dead transitions. [2024-06-27 20:12:49,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 256 transitions, 2856 flow [2024-06-27 20:12:49,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:49,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:12:49,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 20:12:49,321 INFO L175 Difference]: Start difference. First operand has 153 places, 210 transitions, 1912 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:12:49,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 256 transitions, 2856 flow [2024-06-27 20:12:49,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 256 transitions, 2809 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:49,408 INFO L231 Difference]: Finished difference. Result has 158 places, 218 transitions, 2159 flow [2024-06-27 20:12:49,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2159, PETRI_PLACES=158, PETRI_TRANSITIONS=218} [2024-06-27 20:12:49,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-27 20:12:49,409 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 218 transitions, 2159 flow [2024-06-27 20:12:49,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:49,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:49,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:49,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:12:49,410 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:49,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:49,410 INFO L85 PathProgramCache]: Analyzing trace with hash 15798064, now seen corresponding path program 2 times [2024-06-27 20:12:49,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:49,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177381772] [2024-06-27 20:12:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:49,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:50,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:50,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177381772] [2024-06-27 20:12:50,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177381772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:50,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:50,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:50,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053509875] [2024-06-27 20:12:50,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:50,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:50,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:50,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:50,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 218 transitions, 2159 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:50,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:50,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:50,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:51,038 INFO L124 PetriNetUnfolderBase]: 2081/3166 cut-off events. [2024-06-27 20:12:51,039 INFO L125 PetriNetUnfolderBase]: For 170632/170632 co-relation queries the response was YES. [2024-06-27 20:12:51,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25025 conditions, 3166 events. 2081/3166 cut-off events. For 170632/170632 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15636 event pairs, 445 based on Foata normal form. 6/3171 useless extension candidates. Maximal degree in co-relation 24954. Up to 2987 conditions per place. [2024-06-27 20:12:51,064 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 217 selfloop transitions, 35 changer transitions 0/256 dead transitions. [2024-06-27 20:12:51,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 256 transitions, 2925 flow [2024-06-27 20:12:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:12:51,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-27 20:12:51,066 INFO L175 Difference]: Start difference. First operand has 158 places, 218 transitions, 2159 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:12:51,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 256 transitions, 2925 flow [2024-06-27 20:12:51,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 256 transitions, 2772 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:51,202 INFO L231 Difference]: Finished difference. Result has 163 places, 221 transitions, 2188 flow [2024-06-27 20:12:51,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2188, PETRI_PLACES=163, PETRI_TRANSITIONS=221} [2024-06-27 20:12:51,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-27 20:12:51,202 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 221 transitions, 2188 flow [2024-06-27 20:12:51,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:51,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:51,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:51,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:12:51,203 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:51,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:51,203 INFO L85 PathProgramCache]: Analyzing trace with hash 15650194, now seen corresponding path program 3 times [2024-06-27 20:12:51,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:51,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48523483] [2024-06-27 20:12:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:51,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:51,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:51,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48523483] [2024-06-27 20:12:51,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48523483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:51,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:51,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:51,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914297688] [2024-06-27 20:12:51,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:51,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:51,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:51,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:51,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:52,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:52,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 221 transitions, 2188 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:52,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:52,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:52,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:52,863 INFO L124 PetriNetUnfolderBase]: 2135/3248 cut-off events. [2024-06-27 20:12:52,863 INFO L125 PetriNetUnfolderBase]: For 180954/180954 co-relation queries the response was YES. [2024-06-27 20:12:52,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26067 conditions, 3248 events. 2135/3248 cut-off events. For 180954/180954 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16170 event pairs, 450 based on Foata normal form. 6/3253 useless extension candidates. Maximal degree in co-relation 25994. Up to 2985 conditions per place. [2024-06-27 20:12:52,888 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 222 selfloop transitions, 38 changer transitions 0/264 dead transitions. [2024-06-27 20:12:52,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 264 transitions, 3130 flow [2024-06-27 20:12:52,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:52,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:52,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:12:52,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:12:52,889 INFO L175 Difference]: Start difference. First operand has 163 places, 221 transitions, 2188 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:12:52,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 264 transitions, 3130 flow [2024-06-27 20:12:53,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 264 transitions, 2972 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:53,031 INFO L231 Difference]: Finished difference. Result has 166 places, 227 transitions, 2307 flow [2024-06-27 20:12:53,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2307, PETRI_PLACES=166, PETRI_TRANSITIONS=227} [2024-06-27 20:12:53,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-27 20:12:53,032 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 227 transitions, 2307 flow [2024-06-27 20:12:53,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:53,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:53,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:53,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:12:53,032 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:53,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:53,033 INFO L85 PathProgramCache]: Analyzing trace with hash 467663258, now seen corresponding path program 1 times [2024-06-27 20:12:53,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:53,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746198780] [2024-06-27 20:12:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:53,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:54,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:54,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746198780] [2024-06-27 20:12:54,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746198780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:54,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:54,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:12:54,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303008237] [2024-06-27 20:12:54,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:54,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:12:54,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:54,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:12:54,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:12:54,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:54,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 227 transitions, 2307 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:54,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:54,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:54,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:55,140 INFO L124 PetriNetUnfolderBase]: 2231/3408 cut-off events. [2024-06-27 20:12:55,141 INFO L125 PetriNetUnfolderBase]: For 215174/215174 co-relation queries the response was YES. [2024-06-27 20:12:55,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27940 conditions, 3408 events. 2231/3408 cut-off events. For 215174/215174 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17299 event pairs, 468 based on Foata normal form. 24/3431 useless extension candidates. Maximal degree in co-relation 27865. Up to 3064 conditions per place. [2024-06-27 20:12:55,171 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 227 selfloop transitions, 40 changer transitions 0/271 dead transitions. [2024-06-27 20:12:55,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 271 transitions, 3161 flow [2024-06-27 20:12:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 20:12:55,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-27 20:12:55,172 INFO L175 Difference]: Start difference. First operand has 166 places, 227 transitions, 2307 flow. Second operand 10 states and 189 transitions. [2024-06-27 20:12:55,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 271 transitions, 3161 flow [2024-06-27 20:12:55,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 271 transitions, 2998 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:55,346 INFO L231 Difference]: Finished difference. Result has 171 places, 229 transitions, 2335 flow [2024-06-27 20:12:55,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2335, PETRI_PLACES=171, PETRI_TRANSITIONS=229} [2024-06-27 20:12:55,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-27 20:12:55,347 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 229 transitions, 2335 flow [2024-06-27 20:12:55,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:55,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:55,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:55,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:12:55,348 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:55,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:55,348 INFO L85 PathProgramCache]: Analyzing trace with hash -699780582, now seen corresponding path program 4 times [2024-06-27 20:12:55,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:55,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224634267] [2024-06-27 20:12:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:55,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:56,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:56,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224634267] [2024-06-27 20:12:56,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224634267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:56,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:56,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:56,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643356730] [2024-06-27 20:12:56,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:56,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:56,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:56,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:56,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:56,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:56,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 229 transitions, 2335 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:56,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:56,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:56,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:57,127 INFO L124 PetriNetUnfolderBase]: 2277/3481 cut-off events. [2024-06-27 20:12:57,128 INFO L125 PetriNetUnfolderBase]: For 211814/211814 co-relation queries the response was YES. [2024-06-27 20:12:57,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28578 conditions, 3481 events. 2277/3481 cut-off events. For 211814/211814 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17831 event pairs, 468 based on Foata normal form. 6/3486 useless extension candidates. Maximal degree in co-relation 28501. Up to 3271 conditions per place. [2024-06-27 20:12:57,154 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 225 selfloop transitions, 39 changer transitions 0/268 dead transitions. [2024-06-27 20:12:57,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 268 transitions, 3171 flow [2024-06-27 20:12:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:57,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:12:57,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 20:12:57,155 INFO L175 Difference]: Start difference. First operand has 171 places, 229 transitions, 2335 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:12:57,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 268 transitions, 3171 flow [2024-06-27 20:12:57,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 268 transitions, 3058 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 20:12:57,331 INFO L231 Difference]: Finished difference. Result has 172 places, 236 transitions, 2460 flow [2024-06-27 20:12:57,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2460, PETRI_PLACES=172, PETRI_TRANSITIONS=236} [2024-06-27 20:12:57,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-27 20:12:57,334 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 236 transitions, 2460 flow [2024-06-27 20:12:57,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:57,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:57,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:57,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:12:57,337 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:57,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:57,338 INFO L85 PathProgramCache]: Analyzing trace with hash -705142962, now seen corresponding path program 5 times [2024-06-27 20:12:57,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:57,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475712017] [2024-06-27 20:12:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:57,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:58,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:58,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475712017] [2024-06-27 20:12:58,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475712017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:58,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:58,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:58,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319637723] [2024-06-27 20:12:58,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:58,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:58,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:58,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:58,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:58,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:12:58,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 236 transitions, 2460 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:58,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:58,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:12:58,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:58,901 INFO L124 PetriNetUnfolderBase]: 2305/3535 cut-off events. [2024-06-27 20:12:58,901 INFO L125 PetriNetUnfolderBase]: For 217186/217186 co-relation queries the response was YES. [2024-06-27 20:12:58,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29098 conditions, 3535 events. 2305/3535 cut-off events. For 217186/217186 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18207 event pairs, 488 based on Foata normal form. 6/3540 useless extension candidates. Maximal degree in co-relation 29020. Up to 3315 conditions per place. [2024-06-27 20:12:58,929 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 231 selfloop transitions, 37 changer transitions 0/272 dead transitions. [2024-06-27 20:12:58,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 272 transitions, 3366 flow [2024-06-27 20:12:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:12:58,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 20:12:58,930 INFO L175 Difference]: Start difference. First operand has 172 places, 236 transitions, 2460 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:12:58,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 272 transitions, 3366 flow [2024-06-27 20:12:59,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 272 transitions, 3180 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:59,151 INFO L231 Difference]: Finished difference. Result has 175 places, 239 transitions, 2482 flow [2024-06-27 20:12:59,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2482, PETRI_PLACES=175, PETRI_TRANSITIONS=239} [2024-06-27 20:12:59,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-27 20:12:59,152 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 239 transitions, 2482 flow [2024-06-27 20:12:59,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:59,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:59,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:59,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:12:59,152 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:59,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:59,153 INFO L85 PathProgramCache]: Analyzing trace with hash -253431590, now seen corresponding path program 6 times [2024-06-27 20:12:59,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:59,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143892742] [2024-06-27 20:12:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:59,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:59,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:59,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143892742] [2024-06-27 20:12:59,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143892742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:59,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:59,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:59,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523804084] [2024-06-27 20:12:59,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:59,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:59,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:59,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:59,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:00,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:00,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 239 transitions, 2482 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:00,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:00,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:00,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:00,822 INFO L124 PetriNetUnfolderBase]: 2359/3607 cut-off events. [2024-06-27 20:13:00,823 INFO L125 PetriNetUnfolderBase]: For 230212/230212 co-relation queries the response was YES. [2024-06-27 20:13:00,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30257 conditions, 3607 events. 2359/3607 cut-off events. For 230212/230212 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18599 event pairs, 486 based on Foata normal form. 6/3612 useless extension candidates. Maximal degree in co-relation 30178. Up to 3283 conditions per place. [2024-06-27 20:13:00,855 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 234 selfloop transitions, 42 changer transitions 0/280 dead transitions. [2024-06-27 20:13:00,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 280 transitions, 3590 flow [2024-06-27 20:13:00,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:00,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:13:00,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 20:13:00,856 INFO L175 Difference]: Start difference. First operand has 175 places, 239 transitions, 2482 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:13:00,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 280 transitions, 3590 flow [2024-06-27 20:13:01,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 280 transitions, 3401 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-27 20:13:01,089 INFO L231 Difference]: Finished difference. Result has 179 places, 245 transitions, 2619 flow [2024-06-27 20:13:01,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2619, PETRI_PLACES=179, PETRI_TRANSITIONS=245} [2024-06-27 20:13:01,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-27 20:13:01,090 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 245 transitions, 2619 flow [2024-06-27 20:13:01,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:01,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:01,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:01,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:13:01,091 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:01,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:01,091 INFO L85 PathProgramCache]: Analyzing trace with hash -705137010, now seen corresponding path program 2 times [2024-06-27 20:13:01,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:01,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929076834] [2024-06-27 20:13:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:01,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:02,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:02,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929076834] [2024-06-27 20:13:02,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929076834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:02,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:02,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:02,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118055660] [2024-06-27 20:13:02,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:02,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:02,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:02,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:02,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:02,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:02,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 245 transitions, 2619 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:02,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:02,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:02,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:02,895 INFO L124 PetriNetUnfolderBase]: 2473/3793 cut-off events. [2024-06-27 20:13:02,896 INFO L125 PetriNetUnfolderBase]: For 270726/270726 co-relation queries the response was YES. [2024-06-27 20:13:02,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32347 conditions, 3793 events. 2473/3793 cut-off events. For 270726/270726 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19946 event pairs, 508 based on Foata normal form. 24/3816 useless extension candidates. Maximal degree in co-relation 32266. Up to 3418 conditions per place. [2024-06-27 20:13:02,932 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 245 selfloop transitions, 42 changer transitions 0/291 dead transitions. [2024-06-27 20:13:02,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 291 transitions, 3645 flow [2024-06-27 20:13:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:13:02,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 20:13:02,935 INFO L175 Difference]: Start difference. First operand has 179 places, 245 transitions, 2619 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:13:02,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 291 transitions, 3645 flow [2024-06-27 20:13:03,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 291 transitions, 3451 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-27 20:13:03,308 INFO L231 Difference]: Finished difference. Result has 185 places, 251 transitions, 2675 flow [2024-06-27 20:13:03,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2425, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2675, PETRI_PLACES=185, PETRI_TRANSITIONS=251} [2024-06-27 20:13:03,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-27 20:13:03,310 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 251 transitions, 2675 flow [2024-06-27 20:13:03,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:03,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:03,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:03,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:13:03,310 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:03,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:03,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1124025168, now seen corresponding path program 3 times [2024-06-27 20:13:03,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:03,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531256283] [2024-06-27 20:13:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:03,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:04,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:04,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531256283] [2024-06-27 20:13:04,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531256283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:04,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:04,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:04,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341420821] [2024-06-27 20:13:04,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:04,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:04,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:04,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:04,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:04,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:04,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 251 transitions, 2675 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:04,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:04,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:04,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:05,347 INFO L124 PetriNetUnfolderBase]: 2569/3963 cut-off events. [2024-06-27 20:13:05,348 INFO L125 PetriNetUnfolderBase]: For 290515/290515 co-relation queries the response was YES. [2024-06-27 20:13:05,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34135 conditions, 3963 events. 2569/3963 cut-off events. For 290515/290515 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21249 event pairs, 531 based on Foata normal form. 24/3986 useless extension candidates. Maximal degree in co-relation 34051. Up to 3578 conditions per place. [2024-06-27 20:13:05,387 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 244 selfloop transitions, 44 changer transitions 0/292 dead transitions. [2024-06-27 20:13:05,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 292 transitions, 3593 flow [2024-06-27 20:13:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:05,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:13:05,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 20:13:05,388 INFO L175 Difference]: Start difference. First operand has 185 places, 251 transitions, 2675 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:13:05,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 292 transitions, 3593 flow [2024-06-27 20:13:05,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 292 transitions, 3459 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:05,702 INFO L231 Difference]: Finished difference. Result has 188 places, 253 transitions, 2760 flow [2024-06-27 20:13:05,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2760, PETRI_PLACES=188, PETRI_TRANSITIONS=253} [2024-06-27 20:13:05,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-27 20:13:05,702 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 253 transitions, 2760 flow [2024-06-27 20:13:05,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:05,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:05,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:05,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:13:05,703 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:05,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:05,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1123815918, now seen corresponding path program 4 times [2024-06-27 20:13:05,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:05,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844612483] [2024-06-27 20:13:05,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:05,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:06,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:06,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844612483] [2024-06-27 20:13:06,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844612483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:06,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:06,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:06,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722262813] [2024-06-27 20:13:06,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:06,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:06,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:06,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:06,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:06,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:06,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 253 transitions, 2760 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:06,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:06,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:06,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:07,928 INFO L124 PetriNetUnfolderBase]: 2769/4297 cut-off events. [2024-06-27 20:13:07,929 INFO L125 PetriNetUnfolderBase]: For 333906/333906 co-relation queries the response was YES. [2024-06-27 20:13:07,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38547 conditions, 4297 events. 2769/4297 cut-off events. For 333906/333906 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23688 event pairs, 554 based on Foata normal form. 18/4314 useless extension candidates. Maximal degree in co-relation 38462. Up to 3381 conditions per place. [2024-06-27 20:13:07,965 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 232 selfloop transitions, 65 changer transitions 0/301 dead transitions. [2024-06-27 20:13:07,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 301 transitions, 4028 flow [2024-06-27 20:13:07,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:07,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:07,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:13:07,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-27 20:13:07,967 INFO L175 Difference]: Start difference. First operand has 188 places, 253 transitions, 2760 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:13:07,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 301 transitions, 4028 flow [2024-06-27 20:13:08,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 301 transitions, 3838 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-06-27 20:13:08,291 INFO L231 Difference]: Finished difference. Result has 188 places, 257 transitions, 2951 flow [2024-06-27 20:13:08,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2951, PETRI_PLACES=188, PETRI_TRANSITIONS=257} [2024-06-27 20:13:08,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-27 20:13:08,292 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 257 transitions, 2951 flow [2024-06-27 20:13:08,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:08,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:08,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:08,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:13:08,292 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:08,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:08,293 INFO L85 PathProgramCache]: Analyzing trace with hash -247713578, now seen corresponding path program 5 times [2024-06-27 20:13:08,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:08,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036572890] [2024-06-27 20:13:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:08,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:09,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:09,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036572890] [2024-06-27 20:13:09,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036572890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:09,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:09,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:09,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827525393] [2024-06-27 20:13:09,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:09,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:09,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:09,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:09,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:09,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:09,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 257 transitions, 2951 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:09,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:09,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:09,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:10,675 INFO L124 PetriNetUnfolderBase]: 2733/4245 cut-off events. [2024-06-27 20:13:10,675 INFO L125 PetriNetUnfolderBase]: For 322563/322563 co-relation queries the response was YES. [2024-06-27 20:13:10,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36861 conditions, 4245 events. 2733/4245 cut-off events. For 322563/322563 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23431 event pairs, 566 based on Foata normal form. 24/4268 useless extension candidates. Maximal degree in co-relation 36777. Up to 3831 conditions per place. [2024-06-27 20:13:10,714 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 239 selfloop transitions, 57 changer transitions 0/300 dead transitions. [2024-06-27 20:13:10,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 300 transitions, 3783 flow [2024-06-27 20:13:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:13:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:13:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-27 20:13:10,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567627494456763 [2024-06-27 20:13:10,716 INFO L175 Difference]: Start difference. First operand has 188 places, 257 transitions, 2951 flow. Second operand 11 states and 206 transitions. [2024-06-27 20:13:10,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 300 transitions, 3783 flow [2024-06-27 20:13:11,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 300 transitions, 3595 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 20:13:11,104 INFO L231 Difference]: Finished difference. Result has 193 places, 257 transitions, 2889 flow [2024-06-27 20:13:11,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2763, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2889, PETRI_PLACES=193, PETRI_TRANSITIONS=257} [2024-06-27 20:13:11,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-27 20:13:11,105 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 257 transitions, 2889 flow [2024-06-27 20:13:11,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:11,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:11,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:11,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:13:11,105 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)] === [2024-06-27 20:13:11,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:11,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1740630119, now seen corresponding path program 1 times [2024-06-27 20:13:11,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:11,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905763823] [2024-06-27 20:13:11,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:11,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:11,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:11,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905763823] [2024-06-27 20:13:11,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905763823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:11,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:11,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:11,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38483564] [2024-06-27 20:13:11,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:11,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:11,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:11,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:11,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:11,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:11,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 257 transitions, 2889 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:13:11,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:11,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:11,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:12,554 INFO L124 PetriNetUnfolderBase]: 2743/4261 cut-off events. [2024-06-27 20:13:12,554 INFO L125 PetriNetUnfolderBase]: For 291082/291082 co-relation queries the response was YES. [2024-06-27 20:13:12,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36514 conditions, 4261 events. 2743/4261 cut-off events. For 291082/291082 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23498 event pairs, 568 based on Foata normal form. 2/4262 useless extension candidates. Maximal degree in co-relation 36428. Up to 4097 conditions per place. [2024-06-27 20:13:12,595 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 254 selfloop transitions, 28 changer transitions 0/286 dead transitions. [2024-06-27 20:13:12,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 286 transitions, 3733 flow [2024-06-27 20:13:12,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:13:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:13:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:13:12,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-27 20:13:12,597 INFO L175 Difference]: Start difference. First operand has 193 places, 257 transitions, 2889 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:13:12,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 286 transitions, 3733 flow [2024-06-27 20:13:12,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 286 transitions, 3587 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 20:13:12,902 INFO L231 Difference]: Finished difference. Result has 191 places, 266 transitions, 2928 flow [2024-06-27 20:13:12,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2745, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2928, PETRI_PLACES=191, PETRI_TRANSITIONS=266} [2024-06-27 20:13:12,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-27 20:13:12,902 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 266 transitions, 2928 flow [2024-06-27 20:13:12,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:13:12,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:12,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:12,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:13:12,903 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:12,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:12,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1478139776, now seen corresponding path program 7 times [2024-06-27 20:13:12,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:12,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366954466] [2024-06-27 20:13:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:12,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:13,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:13,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366954466] [2024-06-27 20:13:13,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366954466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:13,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:13,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:13,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521979737] [2024-06-27 20:13:13,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:13,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:13,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:13,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:13,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:13,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:13,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 266 transitions, 2928 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:13,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:13,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:13,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:14,725 INFO L124 PetriNetUnfolderBase]: 2789/4336 cut-off events. [2024-06-27 20:13:14,725 INFO L125 PetriNetUnfolderBase]: For 310797/310801 co-relation queries the response was YES. [2024-06-27 20:13:14,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37323 conditions, 4336 events. 2789/4336 cut-off events. For 310797/310801 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24064 event pairs, 578 based on Foata normal form. 10/4345 useless extension candidates. Maximal degree in co-relation 37235. Up to 3956 conditions per place. [2024-06-27 20:13:14,766 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 234 selfloop transitions, 65 changer transitions 0/303 dead transitions. [2024-06-27 20:13:14,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 303 transitions, 3972 flow [2024-06-27 20:13:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:14,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:13:14,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 20:13:14,771 INFO L175 Difference]: Start difference. First operand has 191 places, 266 transitions, 2928 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:13:14,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 303 transitions, 3972 flow [2024-06-27 20:13:15,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 303 transitions, 3913 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 20:13:15,104 INFO L231 Difference]: Finished difference. Result has 197 places, 273 transitions, 3189 flow [2024-06-27 20:13:15,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3189, PETRI_PLACES=197, PETRI_TRANSITIONS=273} [2024-06-27 20:13:15,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-27 20:13:15,108 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 273 transitions, 3189 flow [2024-06-27 20:13:15,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:15,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:15,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:15,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:13:15,108 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:15,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:15,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1472777396, now seen corresponding path program 8 times [2024-06-27 20:13:15,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:15,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481425987] [2024-06-27 20:13:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:15,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:15,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:15,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481425987] [2024-06-27 20:13:15,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481425987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:15,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:15,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:15,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896456403] [2024-06-27 20:13:15,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:15,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:15,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:15,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:15,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:16,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:16,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 273 transitions, 3189 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:16,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:16,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:16,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:17,035 INFO L124 PetriNetUnfolderBase]: 2817/4378 cut-off events. [2024-06-27 20:13:17,035 INFO L125 PetriNetUnfolderBase]: For 326809/326813 co-relation queries the response was YES. [2024-06-27 20:13:17,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38392 conditions, 4378 events. 2817/4378 cut-off events. For 326809/326813 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 24304 event pairs, 582 based on Foata normal form. 10/4387 useless extension candidates. Maximal degree in co-relation 38302. Up to 4000 conditions per place. [2024-06-27 20:13:17,077 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 239 selfloop transitions, 64 changer transitions 0/307 dead transitions. [2024-06-27 20:13:17,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 307 transitions, 4321 flow [2024-06-27 20:13:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:13:17,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 20:13:17,079 INFO L175 Difference]: Start difference. First operand has 197 places, 273 transitions, 3189 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:13:17,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 307 transitions, 4321 flow [2024-06-27 20:13:17,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 307 transitions, 4053 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-27 20:13:17,412 INFO L231 Difference]: Finished difference. Result has 200 places, 276 transitions, 3213 flow [2024-06-27 20:13:17,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3213, PETRI_PLACES=200, PETRI_TRANSITIONS=276} [2024-06-27 20:13:17,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-27 20:13:17,413 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 276 transitions, 3213 flow [2024-06-27 20:13:17,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:17,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:17,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:17,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:13:17,414 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:17,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:17,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1472629526, now seen corresponding path program 9 times [2024-06-27 20:13:17,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:17,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323821698] [2024-06-27 20:13:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:17,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:18,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:18,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323821698] [2024-06-27 20:13:18,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323821698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:18,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:18,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:18,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538334950] [2024-06-27 20:13:18,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:18,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:18,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:18,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:18,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:18,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:18,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 276 transitions, 3213 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:18,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:18,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:18,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:19,189 INFO L124 PetriNetUnfolderBase]: 2845/4422 cut-off events. [2024-06-27 20:13:19,190 INFO L125 PetriNetUnfolderBase]: For 336839/336843 co-relation queries the response was YES. [2024-06-27 20:13:19,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38964 conditions, 4422 events. 2845/4422 cut-off events. For 336839/336843 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24565 event pairs, 571 based on Foata normal form. 10/4431 useless extension candidates. Maximal degree in co-relation 38873. Up to 3898 conditions per place. [2024-06-27 20:13:19,230 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 244 selfloop transitions, 69 changer transitions 0/317 dead transitions. [2024-06-27 20:13:19,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 317 transitions, 4757 flow [2024-06-27 20:13:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:13:19,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-27 20:13:19,232 INFO L175 Difference]: Start difference. First operand has 200 places, 276 transitions, 3213 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:13:19,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 317 transitions, 4757 flow [2024-06-27 20:13:19,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 317 transitions, 4439 flow, removed 78 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:19,621 INFO L231 Difference]: Finished difference. Result has 202 places, 282 transitions, 3326 flow [2024-06-27 20:13:19,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2895, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3326, PETRI_PLACES=202, PETRI_TRANSITIONS=282} [2024-06-27 20:13:19,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-27 20:13:19,621 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 282 transitions, 3326 flow [2024-06-27 20:13:19,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:19,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:19,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:19,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:13:19,622 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:19,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:19,622 INFO L85 PathProgramCache]: Analyzing trace with hash -46859166, now seen corresponding path program 10 times [2024-06-27 20:13:19,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:19,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848986595] [2024-06-27 20:13:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:19,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:20,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:20,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848986595] [2024-06-27 20:13:20,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848986595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:20,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:20,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:20,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115461935] [2024-06-27 20:13:20,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:20,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:20,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:20,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:20,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:20,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:20,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 282 transitions, 3326 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:20,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:20,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:20,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:21,539 INFO L124 PetriNetUnfolderBase]: 2845/4422 cut-off events. [2024-06-27 20:13:21,539 INFO L125 PetriNetUnfolderBase]: For 346694/346698 co-relation queries the response was YES. [2024-06-27 20:13:21,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38840 conditions, 4422 events. 2845/4422 cut-off events. For 346694/346698 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24563 event pairs, 585 based on Foata normal form. 10/4431 useless extension candidates. Maximal degree in co-relation 38749. Up to 4046 conditions per place. [2024-06-27 20:13:21,587 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 235 selfloop transitions, 75 changer transitions 0/314 dead transitions. [2024-06-27 20:13:21,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 314 transitions, 4286 flow [2024-06-27 20:13:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:13:21,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 20:13:21,589 INFO L175 Difference]: Start difference. First operand has 202 places, 282 transitions, 3326 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:13:21,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 314 transitions, 4286 flow [2024-06-27 20:13:22,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 314 transitions, 4014 flow, removed 100 selfloop flow, removed 5 redundant places. [2024-06-27 20:13:22,087 INFO L231 Difference]: Finished difference. Result has 206 places, 285 transitions, 3382 flow [2024-06-27 20:13:22,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3074, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3382, PETRI_PLACES=206, PETRI_TRANSITIONS=285} [2024-06-27 20:13:22,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-27 20:13:22,087 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 285 transitions, 3382 flow [2024-06-27 20:13:22,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:22,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:22,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:22,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:13:22,088 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:22,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1478145728, now seen corresponding path program 6 times [2024-06-27 20:13:22,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:22,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466890237] [2024-06-27 20:13:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:22,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:23,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:23,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466890237] [2024-06-27 20:13:23,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466890237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:23,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:23,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:23,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729523670] [2024-06-27 20:13:23,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:23,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:23,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:23,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:23,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:23,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:23,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 285 transitions, 3382 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:23,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:23,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:23,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:24,289 INFO L124 PetriNetUnfolderBase]: 2959/4608 cut-off events. [2024-06-27 20:13:24,289 INFO L125 PetriNetUnfolderBase]: For 391044/391048 co-relation queries the response was YES. [2024-06-27 20:13:24,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40754 conditions, 4608 events. 2959/4608 cut-off events. For 391044/391048 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25940 event pairs, 593 based on Foata normal form. 28/4635 useless extension candidates. Maximal degree in co-relation 40661. Up to 4065 conditions per place. [2024-06-27 20:13:24,331 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 254 selfloop transitions, 70 changer transitions 0/328 dead transitions. [2024-06-27 20:13:24,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 328 transitions, 4538 flow [2024-06-27 20:13:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 20:13:24,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:13:24,332 INFO L175 Difference]: Start difference. First operand has 206 places, 285 transitions, 3382 flow. Second operand 10 states and 190 transitions. [2024-06-27 20:13:24,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 328 transitions, 4538 flow [2024-06-27 20:13:24,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 328 transitions, 4260 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:24,808 INFO L231 Difference]: Finished difference. Result has 210 places, 291 transitions, 3436 flow [2024-06-27 20:13:24,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3104, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3436, PETRI_PLACES=210, PETRI_TRANSITIONS=291} [2024-06-27 20:13:24,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-27 20:13:24,809 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 291 transitions, 3436 flow [2024-06-27 20:13:24,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:24,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:24,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:24,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:13:24,810 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:24,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:24,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1472783348, now seen corresponding path program 7 times [2024-06-27 20:13:24,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:24,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561709260] [2024-06-27 20:13:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:24,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:25,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:25,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561709260] [2024-06-27 20:13:25,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561709260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:25,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:25,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:25,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023095299] [2024-06-27 20:13:25,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:25,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:25,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:25,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:25,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:25,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 291 transitions, 3436 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:25,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:25,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:25,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:27,009 INFO L124 PetriNetUnfolderBase]: 3055/4765 cut-off events. [2024-06-27 20:13:27,010 INFO L125 PetriNetUnfolderBase]: For 422161/422163 co-relation queries the response was YES. [2024-06-27 20:13:27,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42827 conditions, 4765 events. 3055/4765 cut-off events. For 422161/422163 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 27076 event pairs, 622 based on Foata normal form. 24/4787 useless extension candidates. Maximal degree in co-relation 42732. Up to 4168 conditions per place. [2024-06-27 20:13:27,061 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 245 selfloop transitions, 82 changer transitions 0/331 dead transitions. [2024-06-27 20:13:27,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 331 transitions, 4690 flow [2024-06-27 20:13:27,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:13:27,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 20:13:27,062 INFO L175 Difference]: Start difference. First operand has 210 places, 291 transitions, 3436 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:13:27,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 331 transitions, 4690 flow [2024-06-27 20:13:27,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 331 transitions, 4462 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:27,622 INFO L231 Difference]: Finished difference. Result has 213 places, 293 transitions, 3529 flow [2024-06-27 20:13:27,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3529, PETRI_PLACES=213, PETRI_TRANSITIONS=293} [2024-06-27 20:13:27,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-27 20:13:27,623 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 293 transitions, 3529 flow [2024-06-27 20:13:27,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:27,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:27,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:27,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:13:27,623 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:27,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:27,624 INFO L85 PathProgramCache]: Analyzing trace with hash 713668242, now seen corresponding path program 8 times [2024-06-27 20:13:27,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:27,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672828149] [2024-06-27 20:13:27,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:27,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:28,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:28,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672828149] [2024-06-27 20:13:28,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672828149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:28,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:28,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:28,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899752592] [2024-06-27 20:13:28,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:28,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:28,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:28,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:28,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:28,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:28,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 293 transitions, 3529 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:28,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:28,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:28,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:29,848 INFO L124 PetriNetUnfolderBase]: 3151/4935 cut-off events. [2024-06-27 20:13:29,848 INFO L125 PetriNetUnfolderBase]: For 440009/440011 co-relation queries the response was YES. [2024-06-27 20:13:29,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44438 conditions, 4935 events. 3151/4935 cut-off events. For 440009/440011 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28388 event pairs, 637 based on Foata normal form. 24/4957 useless extension candidates. Maximal degree in co-relation 44342. Up to 4331 conditions per place. [2024-06-27 20:13:29,894 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 236 selfloop transitions, 92 changer transitions 0/332 dead transitions. [2024-06-27 20:13:29,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 332 transitions, 4683 flow [2024-06-27 20:13:29,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:13:29,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 20:13:29,896 INFO L175 Difference]: Start difference. First operand has 213 places, 293 transitions, 3529 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:13:29,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 332 transitions, 4683 flow [2024-06-27 20:13:30,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 332 transitions, 4411 flow, removed 50 selfloop flow, removed 9 redundant places. [2024-06-27 20:13:30,392 INFO L231 Difference]: Finished difference. Result has 214 places, 295 transitions, 3599 flow [2024-06-27 20:13:30,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3257, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3599, PETRI_PLACES=214, PETRI_TRANSITIONS=295} [2024-06-27 20:13:30,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-27 20:13:30,393 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 295 transitions, 3599 flow [2024-06-27 20:13:30,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:30,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:30,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:30,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:13:30,393 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:30,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:30,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1478354978, now seen corresponding path program 9 times [2024-06-27 20:13:30,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:30,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130509547] [2024-06-27 20:13:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:30,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:31,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:31,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130509547] [2024-06-27 20:13:31,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130509547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:31,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:31,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:31,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346653393] [2024-06-27 20:13:31,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:31,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:31,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:31,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:31,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:31,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:31,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 295 transitions, 3599 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:31,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:31,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:31,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:32,405 INFO L124 PetriNetUnfolderBase]: 3355/5289 cut-off events. [2024-06-27 20:13:32,405 INFO L125 PetriNetUnfolderBase]: For 449505/449507 co-relation queries the response was YES. [2024-06-27 20:13:32,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47015 conditions, 5289 events. 3355/5289 cut-off events. For 449505/449507 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30957 event pairs, 680 based on Foata normal form. 18/5305 useless extension candidates. Maximal degree in co-relation 46919. Up to 4279 conditions per place. [2024-06-27 20:13:32,455 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 237 selfloop transitions, 100 changer transitions 0/341 dead transitions. [2024-06-27 20:13:32,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 341 transitions, 4931 flow [2024-06-27 20:13:32,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:13:32,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-27 20:13:32,457 INFO L175 Difference]: Start difference. First operand has 214 places, 295 transitions, 3599 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:13:32,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 341 transitions, 4931 flow [2024-06-27 20:13:33,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 341 transitions, 4655 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:33,044 INFO L231 Difference]: Finished difference. Result has 217 places, 301 transitions, 3828 flow [2024-06-27 20:13:33,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3323, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3828, PETRI_PLACES=217, PETRI_TRANSITIONS=301} [2024-06-27 20:13:33,044 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-27 20:13:33,044 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 301 transitions, 3828 flow [2024-06-27 20:13:33,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:33,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:33,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:33,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:13:33,045 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:33,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:33,045 INFO L85 PathProgramCache]: Analyzing trace with hash -46853214, now seen corresponding path program 10 times [2024-06-27 20:13:33,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:33,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445287304] [2024-06-27 20:13:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:33,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:34,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:34,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445287304] [2024-06-27 20:13:34,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445287304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:34,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:34,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:34,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738798122] [2024-06-27 20:13:34,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:34,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:34,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:34,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:34,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:34,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:34,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 301 transitions, 3828 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:34,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:34,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:34,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:35,330 INFO L124 PetriNetUnfolderBase]: 3441/5434 cut-off events. [2024-06-27 20:13:35,331 INFO L125 PetriNetUnfolderBase]: For 476107/476111 co-relation queries the response was YES. [2024-06-27 20:13:35,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48549 conditions, 5434 events. 3441/5434 cut-off events. For 476107/476111 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 32219 event pairs, 709 based on Foata normal form. 28/5461 useless extension candidates. Maximal degree in co-relation 48451. Up to 4892 conditions per place. [2024-06-27 20:13:35,399 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 255 selfloop transitions, 80 changer transitions 0/339 dead transitions. [2024-06-27 20:13:35,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 339 transitions, 4896 flow [2024-06-27 20:13:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:13:35,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 20:13:35,401 INFO L175 Difference]: Start difference. First operand has 217 places, 301 transitions, 3828 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:13:35,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 339 transitions, 4896 flow [2024-06-27 20:13:36,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 339 transitions, 4595 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:36,022 INFO L231 Difference]: Finished difference. Result has 220 places, 303 transitions, 3856 flow [2024-06-27 20:13:36,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3527, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3856, PETRI_PLACES=220, PETRI_TRANSITIONS=303} [2024-06-27 20:13:36,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-27 20:13:36,023 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 303 transitions, 3856 flow [2024-06-27 20:13:36,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:36,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:36,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:36,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:13:36,024 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:36,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash -46651404, now seen corresponding path program 11 times [2024-06-27 20:13:36,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:36,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569351732] [2024-06-27 20:13:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:36,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:36,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:36,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569351732] [2024-06-27 20:13:36,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569351732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:36,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:36,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:36,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145900750] [2024-06-27 20:13:36,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:36,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:36,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:36,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:36,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:37,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:37,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 303 transitions, 3856 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:37,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:37,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:37,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:38,269 INFO L124 PetriNetUnfolderBase]: 3543/5615 cut-off events. [2024-06-27 20:13:38,270 INFO L125 PetriNetUnfolderBase]: For 494991/494993 co-relation queries the response was YES. [2024-06-27 20:13:38,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49742 conditions, 5615 events. 3543/5615 cut-off events. For 494991/494993 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 33712 event pairs, 746 based on Foata normal form. 24/5637 useless extension candidates. Maximal degree in co-relation 49643. Up to 4990 conditions per place. [2024-06-27 20:13:38,331 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 240 selfloop transitions, 105 changer transitions 0/349 dead transitions. [2024-06-27 20:13:38,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 349 transitions, 4980 flow [2024-06-27 20:13:38,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:13:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:13:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-27 20:13:38,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458980044345898 [2024-06-27 20:13:38,332 INFO L175 Difference]: Start difference. First operand has 220 places, 303 transitions, 3856 flow. Second operand 11 states and 207 transitions. [2024-06-27 20:13:38,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 349 transitions, 4980 flow [2024-06-27 20:13:38,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 349 transitions, 4716 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:39,000 INFO L231 Difference]: Finished difference. Result has 224 places, 309 transitions, 4009 flow [2024-06-27 20:13:39,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4009, PETRI_PLACES=224, PETRI_TRANSITIONS=309} [2024-06-27 20:13:39,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-27 20:13:39,001 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 309 transitions, 4009 flow [2024-06-27 20:13:39,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:39,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:39,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:39,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:13:39,002 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:39,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:39,002 INFO L85 PathProgramCache]: Analyzing trace with hash -46643964, now seen corresponding path program 12 times [2024-06-27 20:13:39,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:39,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931315199] [2024-06-27 20:13:39,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:39,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:39,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:39,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931315199] [2024-06-27 20:13:39,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931315199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:39,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:39,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:39,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934922520] [2024-06-27 20:13:39,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:39,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:39,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:39,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:39,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:40,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:40,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 309 transitions, 4009 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:40,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:40,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:40,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:41,367 INFO L124 PetriNetUnfolderBase]: 3665/5823 cut-off events. [2024-06-27 20:13:41,367 INFO L125 PetriNetUnfolderBase]: For 500630/500632 co-relation queries the response was YES. [2024-06-27 20:13:41,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51428 conditions, 5823 events. 3665/5823 cut-off events. For 500630/500632 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 35334 event pairs, 753 based on Foata normal form. 18/5839 useless extension candidates. Maximal degree in co-relation 51327. Up to 4979 conditions per place. [2024-06-27 20:13:41,420 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 241 selfloop transitions, 107 changer transitions 0/352 dead transitions. [2024-06-27 20:13:41,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 352 transitions, 5205 flow [2024-06-27 20:13:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 20:13:41,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-27 20:13:41,436 INFO L175 Difference]: Start difference. First operand has 224 places, 309 transitions, 4009 flow. Second operand 10 states and 192 transitions. [2024-06-27 20:13:41,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 352 transitions, 5205 flow [2024-06-27 20:13:42,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 352 transitions, 4908 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:42,023 INFO L231 Difference]: Finished difference. Result has 227 places, 313 transitions, 4173 flow [2024-06-27 20:13:42,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3712, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4173, PETRI_PLACES=227, PETRI_TRANSITIONS=313} [2024-06-27 20:13:42,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-27 20:13:42,025 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 313 transitions, 4173 flow [2024-06-27 20:13:42,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:42,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:42,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:42,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:13:42,026 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:42,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:42,026 INFO L85 PathProgramCache]: Analyzing trace with hash 209849106, now seen corresponding path program 13 times [2024-06-27 20:13:42,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:42,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174790423] [2024-06-27 20:13:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:42,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:42,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:42,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174790423] [2024-06-27 20:13:42,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174790423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:42,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:42,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:42,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573853440] [2024-06-27 20:13:42,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:42,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:42,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:42,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:42,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:43,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:43,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 313 transitions, 4173 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:43,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:43,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:43,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:44,244 INFO L124 PetriNetUnfolderBase]: 3751/5975 cut-off events. [2024-06-27 20:13:44,244 INFO L125 PetriNetUnfolderBase]: For 530689/530691 co-relation queries the response was YES. [2024-06-27 20:13:44,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53009 conditions, 5975 events. 3751/5975 cut-off events. For 530689/530691 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 36612 event pairs, 785 based on Foata normal form. 24/5997 useless extension candidates. Maximal degree in co-relation 52906. Up to 5209 conditions per place. [2024-06-27 20:13:44,307 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 202 selfloop transitions, 145 changer transitions 0/351 dead transitions. [2024-06-27 20:13:44,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 351 transitions, 5283 flow [2024-06-27 20:13:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 20:13:44,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:13:44,309 INFO L175 Difference]: Start difference. First operand has 227 places, 313 transitions, 4173 flow. Second operand 10 states and 190 transitions. [2024-06-27 20:13:44,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 351 transitions, 5283 flow [2024-06-27 20:13:45,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 351 transitions, 4956 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:45,141 INFO L231 Difference]: Finished difference. Result has 230 places, 315 transitions, 4314 flow [2024-06-27 20:13:45,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3846, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4314, PETRI_PLACES=230, PETRI_TRANSITIONS=315} [2024-06-27 20:13:45,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-27 20:13:45,142 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 315 transitions, 4314 flow [2024-06-27 20:13:45,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:45,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:45,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:45,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:13:45,143 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:45,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:45,143 INFO L85 PathProgramCache]: Analyzing trace with hash 737209020, now seen corresponding path program 14 times [2024-06-27 20:13:45,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:45,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269115464] [2024-06-27 20:13:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:45,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:46,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:46,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269115464] [2024-06-27 20:13:46,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269115464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:46,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:46,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:46,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885553924] [2024-06-27 20:13:46,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:46,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:46,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:46,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:46,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:46,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:46,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 315 transitions, 4314 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:46,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:46,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:46,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:47,518 INFO L124 PetriNetUnfolderBase]: 3812/6095 cut-off events. [2024-06-27 20:13:47,519 INFO L125 PetriNetUnfolderBase]: For 538409/538413 co-relation queries the response was YES. [2024-06-27 20:13:47,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54137 conditions, 6095 events. 3812/6095 cut-off events. For 538409/538413 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 37628 event pairs, 765 based on Foata normal form. 22/6116 useless extension candidates. Maximal degree in co-relation 54033. Up to 4783 conditions per place. [2024-06-27 20:13:47,589 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 213 selfloop transitions, 143 changer transitions 0/360 dead transitions. [2024-06-27 20:13:47,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 360 transitions, 5490 flow [2024-06-27 20:13:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:13:47,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:13:47,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-27 20:13:47,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678492239467849 [2024-06-27 20:13:47,591 INFO L175 Difference]: Start difference. First operand has 230 places, 315 transitions, 4314 flow. Second operand 11 states and 211 transitions. [2024-06-27 20:13:47,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 360 transitions, 5490 flow [2024-06-27 20:13:48,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 360 transitions, 5070 flow, removed 62 selfloop flow, removed 9 redundant places. [2024-06-27 20:13:48,596 INFO L231 Difference]: Finished difference. Result has 232 places, 317 transitions, 4364 flow [2024-06-27 20:13:48,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4364, PETRI_PLACES=232, PETRI_TRANSITIONS=317} [2024-06-27 20:13:48,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-27 20:13:48,597 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 317 transitions, 4364 flow [2024-06-27 20:13:48,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:48,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:48,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:48,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:13:48,597 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:48,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:48,598 INFO L85 PathProgramCache]: Analyzing trace with hash 746405790, now seen corresponding path program 15 times [2024-06-27 20:13:48,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:48,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516584390] [2024-06-27 20:13:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:48,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:49,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:49,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516584390] [2024-06-27 20:13:49,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516584390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:49,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:49,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:49,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175560826] [2024-06-27 20:13:49,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:49,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:49,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:49,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:49,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:49,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 317 transitions, 4364 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:49,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:49,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:49,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:50,902 INFO L124 PetriNetUnfolderBase]: 3848/6165 cut-off events. [2024-06-27 20:13:50,902 INFO L125 PetriNetUnfolderBase]: For 538912/538916 co-relation queries the response was YES. [2024-06-27 20:13:50,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54242 conditions, 6165 events. 3848/6165 cut-off events. For 538912/538916 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38204 event pairs, 762 based on Foata normal form. 22/6186 useless extension candidates. Maximal degree in co-relation 54138. Up to 3287 conditions per place. [2024-06-27 20:13:50,969 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 176 selfloop transitions, 179 changer transitions 0/359 dead transitions. [2024-06-27 20:13:50,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 359 transitions, 5536 flow [2024-06-27 20:13:50,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:13:50,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-27 20:13:50,971 INFO L175 Difference]: Start difference. First operand has 232 places, 317 transitions, 4364 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:13:50,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 359 transitions, 5536 flow [2024-06-27 20:13:51,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 359 transitions, 5118 flow, removed 69 selfloop flow, removed 9 redundant places. [2024-06-27 20:13:51,881 INFO L231 Difference]: Finished difference. Result has 233 places, 319 transitions, 4491 flow [2024-06-27 20:13:51,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3952, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4491, PETRI_PLACES=233, PETRI_TRANSITIONS=319} [2024-06-27 20:13:51,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-27 20:13:51,882 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 319 transitions, 4491 flow [2024-06-27 20:13:51,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:51,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:51,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:51,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:13:51,882 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)] === [2024-06-27 20:13:51,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:51,883 INFO L85 PathProgramCache]: Analyzing trace with hash 559289605, now seen corresponding path program 2 times [2024-06-27 20:13:51,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:51,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466465090] [2024-06-27 20:13:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:51,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:52,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:52,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466465090] [2024-06-27 20:13:52,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466465090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:52,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:52,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:52,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849923295] [2024-06-27 20:13:52,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:52,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:52,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:52,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:52,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:52,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 319 transitions, 4491 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:13:52,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:52,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:52,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:53,841 INFO L124 PetriNetUnfolderBase]: 3858/6176 cut-off events. [2024-06-27 20:13:53,841 INFO L125 PetriNetUnfolderBase]: For 497957/497959 co-relation queries the response was YES. [2024-06-27 20:13:53,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54066 conditions, 6176 events. 3858/6176 cut-off events. For 497957/497959 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38393 event pairs, 835 based on Foata normal form. 2/6176 useless extension candidates. Maximal degree in co-relation 53961. Up to 5941 conditions per place. [2024-06-27 20:13:53,913 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 298 selfloop transitions, 33 changer transitions 0/335 dead transitions. [2024-06-27 20:13:53,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 335 transitions, 5375 flow [2024-06-27 20:13:53,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:13:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:13:53,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:13:53,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-27 20:13:53,915 INFO L175 Difference]: Start difference. First operand has 233 places, 319 transitions, 4491 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:13:53,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 335 transitions, 5375 flow [2024-06-27 20:13:54,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 335 transitions, 4892 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-27 20:13:54,788 INFO L231 Difference]: Finished difference. Result has 232 places, 322 transitions, 4128 flow [2024-06-27 20:13:54,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4008, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4128, PETRI_PLACES=232, PETRI_TRANSITIONS=322} [2024-06-27 20:13:54,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-27 20:13:54,789 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 322 transitions, 4128 flow [2024-06-27 20:13:54,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:13:54,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:54,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:54,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:13:54,790 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)] === [2024-06-27 20:13:54,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:54,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1752594569, now seen corresponding path program 3 times [2024-06-27 20:13:54,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:54,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799336794] [2024-06-27 20:13:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:54,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:55,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:55,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799336794] [2024-06-27 20:13:55,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799336794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:55,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:55,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:55,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264199441] [2024-06-27 20:13:55,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:55,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:55,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:55,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:55,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:55,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:13:55,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 322 transitions, 4128 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:13:55,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:55,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:13:55,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:56,639 INFO L124 PetriNetUnfolderBase]: 3852/6170 cut-off events. [2024-06-27 20:13:56,639 INFO L125 PetriNetUnfolderBase]: For 481575/481577 co-relation queries the response was YES. [2024-06-27 20:13:56,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52224 conditions, 6170 events. 3852/6170 cut-off events. For 481575/481577 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38378 event pairs, 835 based on Foata normal form. 2/6170 useless extension candidates. Maximal degree in co-relation 52118. Up to 5936 conditions per place. [2024-06-27 20:13:56,702 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 301 selfloop transitions, 31 changer transitions 0/336 dead transitions. [2024-06-27 20:13:56,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 336 transitions, 4867 flow [2024-06-27 20:13:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:13:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:13:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:13:56,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-27 20:13:56,703 INFO L175 Difference]: Start difference. First operand has 232 places, 322 transitions, 4128 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:13:56,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 336 transitions, 4867 flow [2024-06-27 20:13:57,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 336 transitions, 4744 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:13:57,426 INFO L231 Difference]: Finished difference. Result has 234 places, 322 transitions, 4075 flow [2024-06-27 20:13:57,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4006, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4075, PETRI_PLACES=234, PETRI_TRANSITIONS=322} [2024-06-27 20:13:57,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-27 20:13:57,427 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 322 transitions, 4075 flow [2024-06-27 20:13:57,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:13:57,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:57,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:57,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:13:57,428 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)] === [2024-06-27 20:13:57,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:57,428 INFO L85 PathProgramCache]: Analyzing trace with hash -888672641, now seen corresponding path program 1 times [2024-06-27 20:13:57,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:57,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340248442] [2024-06-27 20:13:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:57,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:57,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:57,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340248442] [2024-06-27 20:13:57,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340248442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:57,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:57,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:13:57,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635051640] [2024-06-27 20:13:57,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:57,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:13:57,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:57,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:13:57,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:13:58,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:13:58,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 322 transitions, 4075 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:58,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:58,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:13:58,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:59,014 INFO L124 PetriNetUnfolderBase]: 3754/6089 cut-off events. [2024-06-27 20:13:59,014 INFO L125 PetriNetUnfolderBase]: For 444640/444640 co-relation queries the response was YES. [2024-06-27 20:13:59,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50398 conditions, 6089 events. 3754/6089 cut-off events. For 444640/444640 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38616 event pairs, 756 based on Foata normal form. 4/6085 useless extension candidates. Maximal degree in co-relation 50292. Up to 5760 conditions per place. [2024-06-27 20:13:59,079 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 312 selfloop transitions, 28 changer transitions 0/349 dead transitions. [2024-06-27 20:13:59,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 349 transitions, 5083 flow [2024-06-27 20:13:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:13:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:13:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:13:59,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-27 20:13:59,080 INFO L175 Difference]: Start difference. First operand has 234 places, 322 transitions, 4075 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:13:59,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 349 transitions, 5083 flow [2024-06-27 20:13:59,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 349 transitions, 5023 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 20:13:59,783 INFO L231 Difference]: Finished difference. Result has 237 places, 332 transitions, 4234 flow [2024-06-27 20:13:59,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4015, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4234, PETRI_PLACES=237, PETRI_TRANSITIONS=332} [2024-06-27 20:13:59,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-27 20:13:59,783 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 332 transitions, 4234 flow [2024-06-27 20:13:59,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:59,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:59,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:59,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:13:59,784 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)] === [2024-06-27 20:13:59,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:59,784 INFO L85 PathProgramCache]: Analyzing trace with hash 559295557, now seen corresponding path program 2 times [2024-06-27 20:13:59,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:59,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472529958] [2024-06-27 20:13:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:59,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:00,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:00,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472529958] [2024-06-27 20:14:00,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472529958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:00,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:00,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:00,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008043890] [2024-06-27 20:14:00,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:00,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:00,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:00,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:00,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:00,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:14:00,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 332 transitions, 4234 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:00,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:00,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:14:00,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:01,419 INFO L124 PetriNetUnfolderBase]: 3748/6085 cut-off events. [2024-06-27 20:14:01,420 INFO L125 PetriNetUnfolderBase]: For 453588/453588 co-relation queries the response was YES. [2024-06-27 20:14:01,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50915 conditions, 6085 events. 3748/6085 cut-off events. For 453588/453588 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 38561 event pairs, 756 based on Foata normal form. 3/6084 useless extension candidates. Maximal degree in co-relation 50807. Up to 5822 conditions per place. [2024-06-27 20:14:01,487 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 321 selfloop transitions, 16 changer transitions 0/346 dead transitions. [2024-06-27 20:14:01,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 346 transitions, 4990 flow [2024-06-27 20:14:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:01,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:14:01,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-27 20:14:01,488 INFO L175 Difference]: Start difference. First operand has 237 places, 332 transitions, 4234 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:14:01,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 346 transitions, 4990 flow [2024-06-27 20:14:02,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 346 transitions, 4904 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-27 20:14:02,183 INFO L231 Difference]: Finished difference. Result has 242 places, 335 transitions, 4247 flow [2024-06-27 20:14:02,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4148, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4247, PETRI_PLACES=242, PETRI_TRANSITIONS=335} [2024-06-27 20:14:02,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-27 20:14:02,184 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 335 transitions, 4247 flow [2024-06-27 20:14:02,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:02,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:02,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:02,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:14:02,185 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)] === [2024-06-27 20:14:02,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:02,185 INFO L85 PathProgramCache]: Analyzing trace with hash 32651437, now seen corresponding path program 3 times [2024-06-27 20:14:02,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:02,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131688859] [2024-06-27 20:14:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:02,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:02,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:02,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131688859] [2024-06-27 20:14:02,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131688859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:02,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:02,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:02,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887730204] [2024-06-27 20:14:02,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:02,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:02,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:02,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:02,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:14:02,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 335 transitions, 4247 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:02,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:02,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:14:02,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:03,835 INFO L124 PetriNetUnfolderBase]: 3744/6076 cut-off events. [2024-06-27 20:14:03,836 INFO L125 PetriNetUnfolderBase]: For 456664/456664 co-relation queries the response was YES. [2024-06-27 20:14:03,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50860 conditions, 6076 events. 3744/6076 cut-off events. For 456664/456664 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38472 event pairs, 755 based on Foata normal form. 2/6070 useless extension candidates. Maximal degree in co-relation 50749. Up to 5812 conditions per place. [2024-06-27 20:14:03,914 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 320 selfloop transitions, 21 changer transitions 0/350 dead transitions. [2024-06-27 20:14:03,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 350 transitions, 5021 flow [2024-06-27 20:14:03,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:03,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:03,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:14:03,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:14:03,931 INFO L175 Difference]: Start difference. First operand has 242 places, 335 transitions, 4247 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:14:03,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 350 transitions, 5021 flow [2024-06-27 20:14:04,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 350 transitions, 4946 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:14:04,927 INFO L231 Difference]: Finished difference. Result has 244 places, 338 transitions, 4286 flow [2024-06-27 20:14:04,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4172, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4286, PETRI_PLACES=244, PETRI_TRANSITIONS=338} [2024-06-27 20:14:04,927 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-27 20:14:04,927 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 338 transitions, 4286 flow [2024-06-27 20:14:04,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:04,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:04,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:04,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:14:04,928 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:04,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:04,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1137647145, now seen corresponding path program 1 times [2024-06-27 20:14:04,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:04,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137377744] [2024-06-27 20:14:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:04,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:05,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:05,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137377744] [2024-06-27 20:14:05,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137377744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:05,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:05,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:14:05,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396207497] [2024-06-27 20:14:05,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:05,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:14:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:14:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:14:06,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:06,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 338 transitions, 4286 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:06,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:06,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:06,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:07,454 INFO L124 PetriNetUnfolderBase]: 3972/6358 cut-off events. [2024-06-27 20:14:07,454 INFO L125 PetriNetUnfolderBase]: For 588332/588332 co-relation queries the response was YES. [2024-06-27 20:14:07,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55395 conditions, 6358 events. 3972/6358 cut-off events. For 588332/588332 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39407 event pairs, 653 based on Foata normal form. 18/6375 useless extension candidates. Maximal degree in co-relation 55284. Up to 5918 conditions per place. [2024-06-27 20:14:07,529 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 347 selfloop transitions, 34 changer transitions 0/385 dead transitions. [2024-06-27 20:14:07,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 385 transitions, 5616 flow [2024-06-27 20:14:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:14:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:14:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:14:07,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 20:14:07,531 INFO L175 Difference]: Start difference. First operand has 244 places, 338 transitions, 4286 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:14:07,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 385 transitions, 5616 flow [2024-06-27 20:14:08,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 385 transitions, 5528 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 20:14:08,503 INFO L231 Difference]: Finished difference. Result has 249 places, 340 transitions, 4451 flow [2024-06-27 20:14:08,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4198, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4451, PETRI_PLACES=249, PETRI_TRANSITIONS=340} [2024-06-27 20:14:08,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-27 20:14:08,503 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 340 transitions, 4451 flow [2024-06-27 20:14:08,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:08,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:08,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:08,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:14:08,504 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:08,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash 485156801, now seen corresponding path program 2 times [2024-06-27 20:14:08,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:08,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117141572] [2024-06-27 20:14:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:08,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:09,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:09,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117141572] [2024-06-27 20:14:09,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117141572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:09,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:09,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:14:09,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717689670] [2024-06-27 20:14:09,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:09,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:14:09,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:09,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:14:09,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:14:09,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:09,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 340 transitions, 4451 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:09,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:09,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:09,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:10,985 INFO L124 PetriNetUnfolderBase]: 4040/6474 cut-off events. [2024-06-27 20:14:10,985 INFO L125 PetriNetUnfolderBase]: For 621804/621804 co-relation queries the response was YES. [2024-06-27 20:14:11,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57304 conditions, 6474 events. 4040/6474 cut-off events. For 621804/621804 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40587 event pairs, 823 based on Foata normal form. 18/6491 useless extension candidates. Maximal degree in co-relation 57192. Up to 6020 conditions per place. [2024-06-27 20:14:11,060 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 342 selfloop transitions, 40 changer transitions 0/386 dead transitions. [2024-06-27 20:14:11,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 386 transitions, 5789 flow [2024-06-27 20:14:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:14:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:14:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 20:14:11,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-27 20:14:11,062 INFO L175 Difference]: Start difference. First operand has 249 places, 340 transitions, 4451 flow. Second operand 10 states and 189 transitions. [2024-06-27 20:14:11,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 386 transitions, 5789 flow [2024-06-27 20:14:11,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 386 transitions, 5586 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-27 20:14:11,925 INFO L231 Difference]: Finished difference. Result has 251 places, 342 transitions, 4517 flow [2024-06-27 20:14:11,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4248, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4517, PETRI_PLACES=251, PETRI_TRANSITIONS=342} [2024-06-27 20:14:11,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-27 20:14:11,925 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 342 transitions, 4517 flow [2024-06-27 20:14:11,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:11,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:11,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:11,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:14:11,926 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:11,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:11,926 INFO L85 PathProgramCache]: Analyzing trace with hash 733556089, now seen corresponding path program 3 times [2024-06-27 20:14:11,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:11,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194366831] [2024-06-27 20:14:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:11,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:12,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:12,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194366831] [2024-06-27 20:14:12,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194366831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:12,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:12,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:14:12,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984371435] [2024-06-27 20:14:12,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:12,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:14:12,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:12,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:14:12,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:14:13,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:13,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 342 transitions, 4517 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:13,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:13,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:13,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:14,489 INFO L124 PetriNetUnfolderBase]: 4108/6590 cut-off events. [2024-06-27 20:14:14,489 INFO L125 PetriNetUnfolderBase]: For 655340/655340 co-relation queries the response was YES. [2024-06-27 20:14:14,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58324 conditions, 6590 events. 4108/6590 cut-off events. For 655340/655340 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41469 event pairs, 831 based on Foata normal form. 18/6607 useless extension candidates. Maximal degree in co-relation 58211. Up to 6078 conditions per place. [2024-06-27 20:14:14,580 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 338 selfloop transitions, 44 changer transitions 0/386 dead transitions. [2024-06-27 20:14:14,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 386 transitions, 5995 flow [2024-06-27 20:14:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:14:14,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:14:14,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:14:14,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 20:14:14,591 INFO L175 Difference]: Start difference. First operand has 251 places, 342 transitions, 4517 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:14:14,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 386 transitions, 5995 flow [2024-06-27 20:14:16,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 386 transitions, 5776 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-27 20:14:16,083 INFO L231 Difference]: Finished difference. Result has 253 places, 344 transitions, 4579 flow [2024-06-27 20:14:16,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4298, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4579, PETRI_PLACES=253, PETRI_TRANSITIONS=344} [2024-06-27 20:14:16,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-27 20:14:16,083 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 344 transitions, 4579 flow [2024-06-27 20:14:16,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:16,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:16,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:16,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:14:16,084 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)] === [2024-06-27 20:14:16,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:16,084 INFO L85 PathProgramCache]: Analyzing trace with hash 392884516, now seen corresponding path program 1 times [2024-06-27 20:14:16,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:16,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840219162] [2024-06-27 20:14:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:16,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:16,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:16,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840219162] [2024-06-27 20:14:16,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840219162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:16,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:16,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:16,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748127493] [2024-06-27 20:14:16,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:16,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:16,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:16,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:16,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 344 transitions, 4579 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:14:16,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:16,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:16,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:17,930 INFO L124 PetriNetUnfolderBase]: 4112/6598 cut-off events. [2024-06-27 20:14:17,930 INFO L125 PetriNetUnfolderBase]: For 613788/613788 co-relation queries the response was YES. [2024-06-27 20:14:17,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57579 conditions, 6598 events. 4112/6598 cut-off events. For 613788/613788 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 41550 event pairs, 888 based on Foata normal form. 4/6601 useless extension candidates. Maximal degree in co-relation 57465. Up to 6321 conditions per place. [2024-06-27 20:14:18,005 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 328 selfloop transitions, 38 changer transitions 0/370 dead transitions. [2024-06-27 20:14:18,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 370 transitions, 5602 flow [2024-06-27 20:14:18,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:14:18,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-27 20:14:18,007 INFO L175 Difference]: Start difference. First operand has 253 places, 344 transitions, 4579 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:14:18,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 370 transitions, 5602 flow [2024-06-27 20:14:19,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 370 transitions, 5363 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-27 20:14:19,545 INFO L231 Difference]: Finished difference. Result has 252 places, 349 transitions, 4524 flow [2024-06-27 20:14:19,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4348, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4524, PETRI_PLACES=252, PETRI_TRANSITIONS=349} [2024-06-27 20:14:19,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-27 20:14:19,545 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 349 transitions, 4524 flow [2024-06-27 20:14:19,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:14:19,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:19,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:19,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:14:19,546 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)] === [2024-06-27 20:14:19,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:19,546 INFO L85 PathProgramCache]: Analyzing trace with hash 398598436, now seen corresponding path program 2 times [2024-06-27 20:14:19,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:19,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558557680] [2024-06-27 20:14:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:19,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:20,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:20,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558557680] [2024-06-27 20:14:20,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558557680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:20,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:20,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:20,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975354876] [2024-06-27 20:14:20,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:20,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:20,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:20,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:20,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:20,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:20,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 349 transitions, 4524 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:14:20,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:20,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:20,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:21,373 INFO L124 PetriNetUnfolderBase]: 4122/6614 cut-off events. [2024-06-27 20:14:21,374 INFO L125 PetriNetUnfolderBase]: For 596132/596132 co-relation queries the response was YES. [2024-06-27 20:14:21,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56743 conditions, 6614 events. 4122/6614 cut-off events. For 596132/596132 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41665 event pairs, 880 based on Foata normal form. 2/6615 useless extension candidates. Maximal degree in co-relation 56628. Up to 6419 conditions per place. [2024-06-27 20:14:21,460 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 347 selfloop transitions, 21 changer transitions 0/372 dead transitions. [2024-06-27 20:14:21,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 372 transitions, 5419 flow [2024-06-27 20:14:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:21,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:14:21,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-27 20:14:21,461 INFO L175 Difference]: Start difference. First operand has 252 places, 349 transitions, 4524 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:14:21,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 372 transitions, 5419 flow [2024-06-27 20:14:22,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 372 transitions, 5344 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 20:14:22,347 INFO L231 Difference]: Finished difference. Result has 255 places, 355 transitions, 4617 flow [2024-06-27 20:14:22,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4454, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4617, PETRI_PLACES=255, PETRI_TRANSITIONS=355} [2024-06-27 20:14:22,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-27 20:14:22,348 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 355 transitions, 4617 flow [2024-06-27 20:14:22,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:14:22,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:22,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:22,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:14:22,348 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)] === [2024-06-27 20:14:22,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:22,348 INFO L85 PathProgramCache]: Analyzing trace with hash 398606372, now seen corresponding path program 1 times [2024-06-27 20:14:22,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:22,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230963422] [2024-06-27 20:14:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:22,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:22,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:22,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230963422] [2024-06-27 20:14:22,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230963422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:22,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:22,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:14:22,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665061596] [2024-06-27 20:14:22,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:22,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:14:22,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:22,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:14:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:14:23,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:23,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 355 transitions, 4617 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:23,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:23,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:23,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:24,425 INFO L124 PetriNetUnfolderBase]: 4142/6642 cut-off events. [2024-06-27 20:14:24,426 INFO L125 PetriNetUnfolderBase]: For 615063/615063 co-relation queries the response was YES. [2024-06-27 20:14:24,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57052 conditions, 6642 events. 4142/6642 cut-off events. For 615063/615063 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 41775 event pairs, 881 based on Foata normal form. 4/6645 useless extension candidates. Maximal degree in co-relation 56936. Up to 6351 conditions per place. [2024-06-27 20:14:24,507 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 341 selfloop transitions, 39 changer transitions 0/384 dead transitions. [2024-06-27 20:14:24,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 384 transitions, 5709 flow [2024-06-27 20:14:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:14:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:14:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:14:24,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 20:14:24,508 INFO L175 Difference]: Start difference. First operand has 255 places, 355 transitions, 4617 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:14:24,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 384 transitions, 5709 flow [2024-06-27 20:14:25,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 384 transitions, 5641 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 20:14:25,529 INFO L231 Difference]: Finished difference. Result has 259 places, 361 transitions, 4739 flow [2024-06-27 20:14:25,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4739, PETRI_PLACES=259, PETRI_TRANSITIONS=361} [2024-06-27 20:14:25,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-27 20:14:25,530 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 361 transitions, 4739 flow [2024-06-27 20:14:25,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:25,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:25,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:25,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:14:25,530 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:25,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:25,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1869900643, now seen corresponding path program 4 times [2024-06-27 20:14:25,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:25,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401799732] [2024-06-27 20:14:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:25,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:26,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:26,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401799732] [2024-06-27 20:14:26,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401799732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:26,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:26,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:14:26,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414178789] [2024-06-27 20:14:26,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:26,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:14:26,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:26,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:14:26,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:14:26,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:26,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 361 transitions, 4739 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:26,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:26,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:26,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:27,940 INFO L124 PetriNetUnfolderBase]: 4149/6661 cut-off events. [2024-06-27 20:14:27,940 INFO L125 PetriNetUnfolderBase]: For 649885/649889 co-relation queries the response was YES. [2024-06-27 20:14:27,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57404 conditions, 6661 events. 4149/6661 cut-off events. For 649885/649889 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 41996 event pairs, 827 based on Foata normal form. 22/6682 useless extension candidates. Maximal degree in co-relation 57287. Up to 5951 conditions per place. [2024-06-27 20:14:28,021 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 317 selfloop transitions, 80 changer transitions 0/401 dead transitions. [2024-06-27 20:14:28,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 401 transitions, 6191 flow [2024-06-27 20:14:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:14:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:14:28,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 20:14:28,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-27 20:14:28,023 INFO L175 Difference]: Start difference. First operand has 259 places, 361 transitions, 4739 flow. Second operand 10 states and 189 transitions. [2024-06-27 20:14:28,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 401 transitions, 6191 flow [2024-06-27 20:14:29,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 401 transitions, 6121 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 20:14:29,440 INFO L231 Difference]: Finished difference. Result has 264 places, 361 transitions, 4798 flow [2024-06-27 20:14:29,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4798, PETRI_PLACES=264, PETRI_TRANSITIONS=361} [2024-06-27 20:14:29,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-27 20:14:29,441 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 361 transitions, 4798 flow [2024-06-27 20:14:29,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:29,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:29,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:29,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:14:29,442 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)] === [2024-06-27 20:14:29,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:29,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1790487890, now seen corresponding path program 3 times [2024-06-27 20:14:29,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:29,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880884671] [2024-06-27 20:14:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:29,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:30,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:30,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880884671] [2024-06-27 20:14:30,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880884671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:30,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:30,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:30,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462627757] [2024-06-27 20:14:30,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:30,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:30,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:30,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:30,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:30,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:30,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 361 transitions, 4798 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:14:30,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:30,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:30,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:31,385 INFO L124 PetriNetUnfolderBase]: 4169/6691 cut-off events. [2024-06-27 20:14:31,385 INFO L125 PetriNetUnfolderBase]: For 635859/635863 co-relation queries the response was YES. [2024-06-27 20:14:31,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58193 conditions, 6691 events. 4169/6691 cut-off events. For 635859/635863 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42142 event pairs, 894 based on Foata normal form. 8/6698 useless extension candidates. Maximal degree in co-relation 58074. Up to 6237 conditions per place. [2024-06-27 20:14:31,455 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 308 selfloop transitions, 75 changer transitions 0/387 dead transitions. [2024-06-27 20:14:31,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 387 transitions, 6024 flow [2024-06-27 20:14:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:31,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:14:31,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-27 20:14:31,457 INFO L175 Difference]: Start difference. First operand has 264 places, 361 transitions, 4798 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:14:31,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 387 transitions, 6024 flow [2024-06-27 20:14:32,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 387 transitions, 5722 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-27 20:14:32,640 INFO L231 Difference]: Finished difference. Result has 264 places, 368 transitions, 4775 flow [2024-06-27 20:14:32,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4775, PETRI_PLACES=264, PETRI_TRANSITIONS=368} [2024-06-27 20:14:32,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-27 20:14:32,641 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 368 transitions, 4775 flow [2024-06-27 20:14:32,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:14:32,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:32,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:32,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:14:32,642 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)] === [2024-06-27 20:14:32,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:32,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1600422180, now seen corresponding path program 4 times [2024-06-27 20:14:32,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:32,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165469527] [2024-06-27 20:14:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:32,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:33,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:33,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165469527] [2024-06-27 20:14:33,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165469527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:33,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:33,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:33,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039979591] [2024-06-27 20:14:33,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:33,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:33,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:33,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:33,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:33,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:33,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 368 transitions, 4775 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:14:33,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:33,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:33,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:34,473 INFO L124 PetriNetUnfolderBase]: 4173/6699 cut-off events. [2024-06-27 20:14:34,473 INFO L125 PetriNetUnfolderBase]: For 617170/617174 co-relation queries the response was YES. [2024-06-27 20:14:34,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57122 conditions, 6699 events. 4173/6699 cut-off events. For 617170/617174 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42200 event pairs, 885 based on Foata normal form. 8/6706 useless extension candidates. Maximal degree in co-relation 57002. Up to 6238 conditions per place. [2024-06-27 20:14:34,560 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 299 selfloop transitions, 87 changer transitions 0/390 dead transitions. [2024-06-27 20:14:34,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 390 transitions, 5851 flow [2024-06-27 20:14:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:14:34,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-27 20:14:34,561 INFO L175 Difference]: Start difference. First operand has 264 places, 368 transitions, 4775 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:14:34,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 390 transitions, 5851 flow [2024-06-27 20:14:35,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 390 transitions, 5716 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 20:14:35,690 INFO L231 Difference]: Finished difference. Result has 267 places, 373 transitions, 4915 flow [2024-06-27 20:14:35,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4643, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4915, PETRI_PLACES=267, PETRI_TRANSITIONS=373} [2024-06-27 20:14:35,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-27 20:14:35,691 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 373 transitions, 4915 flow [2024-06-27 20:14:35,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:14:35,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:35,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:35,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:14:35,691 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)] === [2024-06-27 20:14:35,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:35,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1359189834, now seen corresponding path program 5 times [2024-06-27 20:14:35,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:35,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948387093] [2024-06-27 20:14:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:35,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:36,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:36,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948387093] [2024-06-27 20:14:36,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948387093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:36,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:36,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:36,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87482257] [2024-06-27 20:14:36,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:36,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:36,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:36,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:36,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:36,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:36,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 373 transitions, 4915 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:14:36,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:36,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:36,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:37,610 INFO L124 PetriNetUnfolderBase]: 4107/6582 cut-off events. [2024-06-27 20:14:37,610 INFO L125 PetriNetUnfolderBase]: For 616626/616630 co-relation queries the response was YES. [2024-06-27 20:14:37,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56191 conditions, 6582 events. 4107/6582 cut-off events. For 616626/616630 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41265 event pairs, 877 based on Foata normal form. 6/6587 useless extension candidates. Maximal degree in co-relation 56070. Up to 6383 conditions per place. [2024-06-27 20:14:37,694 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 359 selfloop transitions, 21 changer transitions 0/384 dead transitions. [2024-06-27 20:14:37,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 384 transitions, 5710 flow [2024-06-27 20:14:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:37,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:14:37,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-27 20:14:37,696 INFO L175 Difference]: Start difference. First operand has 267 places, 373 transitions, 4915 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:14:37,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 384 transitions, 5710 flow [2024-06-27 20:14:38,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 384 transitions, 5547 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 20:14:38,875 INFO L231 Difference]: Finished difference. Result has 270 places, 373 transitions, 4804 flow [2024-06-27 20:14:38,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4754, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4804, PETRI_PLACES=270, PETRI_TRANSITIONS=373} [2024-06-27 20:14:38,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-27 20:14:38,875 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 373 transitions, 4804 flow [2024-06-27 20:14:38,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:14:38,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:38,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:38,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:14:38,876 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)] === [2024-06-27 20:14:38,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:38,876 INFO L85 PathProgramCache]: Analyzing trace with hash 939670132, now seen corresponding path program 6 times [2024-06-27 20:14:38,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:38,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7957543] [2024-06-27 20:14:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:38,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:39,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:39,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7957543] [2024-06-27 20:14:39,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7957543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:39,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:39,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:39,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334823031] [2024-06-27 20:14:39,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:39,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:39,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:39,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:39,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:39,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:39,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 373 transitions, 4804 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:14:39,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:39,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:39,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:40,808 INFO L124 PetriNetUnfolderBase]: 4027/6441 cut-off events. [2024-06-27 20:14:40,809 INFO L125 PetriNetUnfolderBase]: For 620313/620317 co-relation queries the response was YES. [2024-06-27 20:14:40,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54797 conditions, 6441 events. 4027/6441 cut-off events. For 620313/620317 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40172 event pairs, 861 based on Foata normal form. 6/6446 useless extension candidates. Maximal degree in co-relation 54675. Up to 6231 conditions per place. [2024-06-27 20:14:40,881 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 348 selfloop transitions, 33 changer transitions 0/385 dead transitions. [2024-06-27 20:14:40,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 385 transitions, 5610 flow [2024-06-27 20:14:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:40,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:14:40,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-27 20:14:40,882 INFO L175 Difference]: Start difference. First operand has 270 places, 373 transitions, 4804 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:14:40,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 385 transitions, 5610 flow [2024-06-27 20:14:42,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 385 transitions, 5467 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 20:14:42,018 INFO L231 Difference]: Finished difference. Result has 269 places, 373 transitions, 4737 flow [2024-06-27 20:14:42,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4663, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4737, PETRI_PLACES=269, PETRI_TRANSITIONS=373} [2024-06-27 20:14:42,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-27 20:14:42,018 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 373 transitions, 4737 flow [2024-06-27 20:14:42,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-27 20:14:42,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:42,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:42,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:14:42,019 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)] === [2024-06-27 20:14:42,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:42,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1006476608, now seen corresponding path program 2 times [2024-06-27 20:14:42,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:42,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048093641] [2024-06-27 20:14:42,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:42,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:42,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:42,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048093641] [2024-06-27 20:14:42,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048093641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:42,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:42,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:14:42,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698345863] [2024-06-27 20:14:42,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:42,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:14:42,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:42,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:14:42,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:14:42,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:42,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 373 transitions, 4737 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:42,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:42,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:42,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:44,202 INFO L124 PetriNetUnfolderBase]: 4047/6468 cut-off events. [2024-06-27 20:14:44,202 INFO L125 PetriNetUnfolderBase]: For 639911/639913 co-relation queries the response was YES. [2024-06-27 20:14:44,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55106 conditions, 6468 events. 4047/6468 cut-off events. For 639911/639913 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 40264 event pairs, 872 based on Foata normal form. 4/6470 useless extension candidates. Maximal degree in co-relation 54984. Up to 6166 conditions per place. [2024-06-27 20:14:44,283 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 349 selfloop transitions, 42 changer transitions 0/395 dead transitions. [2024-06-27 20:14:44,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 395 transitions, 5815 flow [2024-06-27 20:14:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:14:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:14:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:14:44,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 20:14:44,284 INFO L175 Difference]: Start difference. First operand has 269 places, 373 transitions, 4737 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:14:44,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 395 transitions, 5815 flow [2024-06-27 20:14:45,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 395 transitions, 5549 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 20:14:45,252 INFO L231 Difference]: Finished difference. Result has 268 places, 376 transitions, 4613 flow [2024-06-27 20:14:45,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4613, PETRI_PLACES=268, PETRI_TRANSITIONS=376} [2024-06-27 20:14:45,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-27 20:14:45,253 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 376 transitions, 4613 flow [2024-06-27 20:14:45,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:45,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:45,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:45,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:14:45,254 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)] === [2024-06-27 20:14:45,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:45,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1019809088, now seen corresponding path program 3 times [2024-06-27 20:14:45,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:45,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811219677] [2024-06-27 20:14:45,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:45,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:45,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:45,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811219677] [2024-06-27 20:14:45,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811219677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:45,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:45,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:14:45,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84494690] [2024-06-27 20:14:45,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:45,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:14:45,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:45,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:14:45,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:14:45,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:45,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 376 transitions, 4613 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:45,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:45,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:45,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:47,314 INFO L124 PetriNetUnfolderBase]: 4067/6501 cut-off events. [2024-06-27 20:14:47,314 INFO L125 PetriNetUnfolderBase]: For 653199/653199 co-relation queries the response was YES. [2024-06-27 20:14:47,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55468 conditions, 6501 events. 4067/6501 cut-off events. For 653199/653199 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 40550 event pairs, 860 based on Foata normal form. 4/6504 useless extension candidates. Maximal degree in co-relation 55345. Up to 6304 conditions per place. [2024-06-27 20:14:47,395 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 369 selfloop transitions, 19 changer transitions 0/392 dead transitions. [2024-06-27 20:14:47,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 392 transitions, 5489 flow [2024-06-27 20:14:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:14:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:14:47,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:14:47,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:14:47,396 INFO L175 Difference]: Start difference. First operand has 268 places, 376 transitions, 4613 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:14:47,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 392 transitions, 5489 flow [2024-06-27 20:14:48,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 392 transitions, 5358 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:14:48,638 INFO L231 Difference]: Finished difference. Result has 270 places, 379 transitions, 4591 flow [2024-06-27 20:14:48,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4488, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4591, PETRI_PLACES=270, PETRI_TRANSITIONS=379} [2024-06-27 20:14:48,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-27 20:14:48,639 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 379 transitions, 4591 flow [2024-06-27 20:14:48,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:48,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:48,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:48,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:14:48,640 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)] === [2024-06-27 20:14:48,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:48,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1491254266, now seen corresponding path program 4 times [2024-06-27 20:14:48,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:48,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131755338] [2024-06-27 20:14:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:48,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:49,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:49,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131755338] [2024-06-27 20:14:49,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131755338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:49,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:49,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:14:49,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808132905] [2024-06-27 20:14:49,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:49,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:14:49,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:14:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:14:49,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:14:49,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 379 transitions, 4591 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:49,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:49,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:14:49,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:50,729 INFO L124 PetriNetUnfolderBase]: 4055/6484 cut-off events. [2024-06-27 20:14:50,730 INFO L125 PetriNetUnfolderBase]: For 653779/653781 co-relation queries the response was YES. [2024-06-27 20:14:50,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55055 conditions, 6484 events. 4055/6484 cut-off events. For 653779/653781 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40462 event pairs, 866 based on Foata normal form. 4/6486 useless extension candidates. Maximal degree in co-relation 54931. Up to 6174 conditions per place. [2024-06-27 20:14:50,809 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 345 selfloop transitions, 47 changer transitions 0/396 dead transitions. [2024-06-27 20:14:50,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 396 transitions, 5449 flow [2024-06-27 20:14:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:14:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:14:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:14:50,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 20:14:50,810 INFO L175 Difference]: Start difference. First operand has 270 places, 379 transitions, 4591 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:14:50,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 396 transitions, 5449 flow [2024-06-27 20:14:52,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 396 transitions, 5308 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-27 20:14:52,065 INFO L231 Difference]: Finished difference. Result has 269 places, 379 transitions, 4550 flow [2024-06-27 20:14:52,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4550, PETRI_PLACES=269, PETRI_TRANSITIONS=379} [2024-06-27 20:14:52,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-27 20:14:52,071 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 379 transitions, 4550 flow [2024-06-27 20:14:52,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:52,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:52,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:52,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:14:52,072 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)] === [2024-06-27 20:14:52,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1782861394, now seen corresponding path program 1 times [2024-06-27 20:14:52,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:52,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400782935] [2024-06-27 20:14:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:52,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:52,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:52,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400782935] [2024-06-27 20:14:52,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400782935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:52,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:52,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:52,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564863320] [2024-06-27 20:14:52,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:52,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:52,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:52,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:52,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:52,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:14:52,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 379 transitions, 4550 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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) [2024-06-27 20:14:52,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:52,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:14:52,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:54,025 INFO L124 PetriNetUnfolderBase]: 3877/6290 cut-off events. [2024-06-27 20:14:54,026 INFO L125 PetriNetUnfolderBase]: For 563766/563774 co-relation queries the response was YES. [2024-06-27 20:14:54,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51703 conditions, 6290 events. 3877/6290 cut-off events. For 563766/563774 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40073 event pairs, 789 based on Foata normal form. 1/6275 useless extension candidates. Maximal degree in co-relation 51580. Up to 5991 conditions per place. [2024-06-27 20:14:54,105 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 364 selfloop transitions, 26 changer transitions 0/399 dead transitions. [2024-06-27 20:14:54,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 399 transitions, 5488 flow [2024-06-27 20:14:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:14:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:14:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:14:54,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 20:14:54,107 INFO L175 Difference]: Start difference. First operand has 269 places, 379 transitions, 4550 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:14:54,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 399 transitions, 5488 flow [2024-06-27 20:14:55,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 399 transitions, 5365 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:14:55,698 INFO L231 Difference]: Finished difference. Result has 270 places, 382 transitions, 4608 flow [2024-06-27 20:14:55,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4427, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4608, PETRI_PLACES=270, PETRI_TRANSITIONS=382} [2024-06-27 20:14:55,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-27 20:14:55,698 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 382 transitions, 4608 flow [2024-06-27 20:14:55,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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) [2024-06-27 20:14:55,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:55,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:55,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:14:55,699 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)] === [2024-06-27 20:14:55,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:55,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1600430271, now seen corresponding path program 1 times [2024-06-27 20:14:55,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:55,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380850146] [2024-06-27 20:14:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:55,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:56,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:56,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380850146] [2024-06-27 20:14:56,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380850146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:56,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:56,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:14:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547551692] [2024-06-27 20:14:56,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:56,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:14:56,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:14:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:14:56,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:14:56,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 382 transitions, 4608 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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) [2024-06-27 20:14:56,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:56,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:14:56,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:57,497 INFO L124 PetriNetUnfolderBase]: 3882/6297 cut-off events. [2024-06-27 20:14:57,497 INFO L125 PetriNetUnfolderBase]: For 579056/579064 co-relation queries the response was YES. [2024-06-27 20:14:57,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52267 conditions, 6297 events. 3882/6297 cut-off events. For 579056/579064 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40104 event pairs, 791 based on Foata normal form. 2/6283 useless extension candidates. Maximal degree in co-relation 52143. Up to 5963 conditions per place. [2024-06-27 20:14:57,577 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 358 selfloop transitions, 38 changer transitions 0/405 dead transitions. [2024-06-27 20:14:57,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 405 transitions, 5668 flow [2024-06-27 20:14:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:14:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:14:57,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:14:57,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-27 20:14:57,578 INFO L175 Difference]: Start difference. First operand has 270 places, 382 transitions, 4608 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:14:57,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 405 transitions, 5668 flow [2024-06-27 20:14:58,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 405 transitions, 5511 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 20:14:59,000 INFO L231 Difference]: Finished difference. Result has 271 places, 385 transitions, 4583 flow [2024-06-27 20:14:59,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4451, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4583, PETRI_PLACES=271, PETRI_TRANSITIONS=385} [2024-06-27 20:14:59,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-27 20:14:59,001 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 385 transitions, 4583 flow [2024-06-27 20:14:59,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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) [2024-06-27 20:14:59,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:59,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:14:59,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:14:59,002 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)] === [2024-06-27 20:14:59,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:59,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1779046379, now seen corresponding path program 2 times [2024-06-27 20:14:59,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:59,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898943581] [2024-06-27 20:14:59,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:59,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:59,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:59,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898943581] [2024-06-27 20:14:59,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898943581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:59,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:59,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:14:59,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599821062] [2024-06-27 20:14:59,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:59,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:14:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:59,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:14:59,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:14:59,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:14:59,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 385 transitions, 4583 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:14:59,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:59,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:14:59,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:00,934 INFO L124 PetriNetUnfolderBase]: 3892/6313 cut-off events. [2024-06-27 20:15:00,935 INFO L125 PetriNetUnfolderBase]: For 591941/591949 co-relation queries the response was YES. [2024-06-27 20:15:00,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52490 conditions, 6313 events. 3892/6313 cut-off events. For 591941/591949 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 40233 event pairs, 792 based on Foata normal form. 2/6299 useless extension candidates. Maximal degree in co-relation 52365. Up to 5973 conditions per place. [2024-06-27 20:15:01,018 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 359 selfloop transitions, 38 changer transitions 0/406 dead transitions. [2024-06-27 20:15:01,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 406 transitions, 5647 flow [2024-06-27 20:15:01,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:15:01,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 20:15:01,020 INFO L175 Difference]: Start difference. First operand has 271 places, 385 transitions, 4583 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:15:01,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 406 transitions, 5647 flow [2024-06-27 20:15:02,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 406 transitions, 5522 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 20:15:02,519 INFO L231 Difference]: Finished difference. Result has 274 places, 388 transitions, 4596 flow [2024-06-27 20:15:02,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4464, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4596, PETRI_PLACES=274, PETRI_TRANSITIONS=388} [2024-06-27 20:15:02,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-27 20:15:02,520 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 388 transitions, 4596 flow [2024-06-27 20:15:02,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:02,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:02,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:02,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:15:02,521 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)] === [2024-06-27 20:15:02,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:02,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1466292583, now seen corresponding path program 3 times [2024-06-27 20:15:02,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:02,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736048418] [2024-06-27 20:15:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:02,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:03,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:03,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736048418] [2024-06-27 20:15:03,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736048418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:03,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:03,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:03,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785410618] [2024-06-27 20:15:03,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:03,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:03,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:03,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:03,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:03,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:15:03,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 388 transitions, 4596 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:03,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:03,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:15:03,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:04,449 INFO L124 PetriNetUnfolderBase]: 3902/6327 cut-off events. [2024-06-27 20:15:04,449 INFO L125 PetriNetUnfolderBase]: For 605962/605970 co-relation queries the response was YES. [2024-06-27 20:15:04,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52694 conditions, 6327 events. 3902/6327 cut-off events. For 605962/605970 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40339 event pairs, 792 based on Foata normal form. 2/6313 useless extension candidates. Maximal degree in co-relation 52568. Up to 6058 conditions per place. [2024-06-27 20:15:04,520 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 376 selfloop transitions, 19 changer transitions 0/404 dead transitions. [2024-06-27 20:15:04,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 404 transitions, 5476 flow [2024-06-27 20:15:04,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:04,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:15:04,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 20:15:04,521 INFO L175 Difference]: Start difference. First operand has 274 places, 388 transitions, 4596 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:15:04,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 404 transitions, 5476 flow [2024-06-27 20:15:05,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 404 transitions, 5384 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 20:15:05,765 INFO L231 Difference]: Finished difference. Result has 277 places, 391 transitions, 4610 flow [2024-06-27 20:15:05,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4610, PETRI_PLACES=277, PETRI_TRANSITIONS=391} [2024-06-27 20:15:05,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-27 20:15:05,765 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 391 transitions, 4610 flow [2024-06-27 20:15:05,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:05,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:05,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:05,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:15:05,766 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)] === [2024-06-27 20:15:05,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:05,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1635155849, now seen corresponding path program 4 times [2024-06-27 20:15:05,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:05,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391435839] [2024-06-27 20:15:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:05,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:06,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:06,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391435839] [2024-06-27 20:15:06,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391435839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:06,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:06,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:06,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096068663] [2024-06-27 20:15:06,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:06,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:06,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:06,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:06,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:06,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:15:06,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 391 transitions, 4610 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:06,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:06,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:15:06,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:07,919 INFO L124 PetriNetUnfolderBase]: 3896/6319 cut-off events. [2024-06-27 20:15:07,920 INFO L125 PetriNetUnfolderBase]: For 608548/608556 co-relation queries the response was YES. [2024-06-27 20:15:07,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52493 conditions, 6319 events. 3896/6319 cut-off events. For 608548/608556 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 40235 event pairs, 789 based on Foata normal form. 2/6305 useless extension candidates. Maximal degree in co-relation 52366. Up to 6041 conditions per place. [2024-06-27 20:15:08,002 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 372 selfloop transitions, 24 changer transitions 0/405 dead transitions. [2024-06-27 20:15:08,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 405 transitions, 5440 flow [2024-06-27 20:15:08,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:15:08,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 20:15:08,003 INFO L175 Difference]: Start difference. First operand has 277 places, 391 transitions, 4610 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:15:08,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 405 transitions, 5440 flow [2024-06-27 20:15:09,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 405 transitions, 5338 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:09,575 INFO L231 Difference]: Finished difference. Result has 279 places, 391 transitions, 4562 flow [2024-06-27 20:15:09,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4508, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4562, PETRI_PLACES=279, PETRI_TRANSITIONS=391} [2024-06-27 20:15:09,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-27 20:15:09,575 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 391 transitions, 4562 flow [2024-06-27 20:15:09,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:09,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:09,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:09,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:15:09,576 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)] === [2024-06-27 20:15:09,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:09,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1019824960, now seen corresponding path program 1 times [2024-06-27 20:15:09,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:09,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889190835] [2024-06-27 20:15:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:09,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:10,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:10,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889190835] [2024-06-27 20:15:10,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889190835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:10,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:10,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:15:10,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402757441] [2024-06-27 20:15:10,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:10,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:15:10,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:10,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:15:10,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:15:10,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:10,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 391 transitions, 4562 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:15:10,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:10,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:10,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:11,953 INFO L124 PetriNetUnfolderBase]: 4083/6525 cut-off events. [2024-06-27 20:15:11,953 INFO L125 PetriNetUnfolderBase]: For 711180/711180 co-relation queries the response was YES. [2024-06-27 20:15:12,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55759 conditions, 6525 events. 4083/6525 cut-off events. For 711180/711180 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40635 event pairs, 864 based on Foata normal form. 2/6526 useless extension candidates. Maximal degree in co-relation 55631. Up to 6338 conditions per place. [2024-06-27 20:15:12,039 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 383 selfloop transitions, 18 changer transitions 0/405 dead transitions. [2024-06-27 20:15:12,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 405 transitions, 5428 flow [2024-06-27 20:15:12,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:12,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:15:12,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 20:15:12,041 INFO L175 Difference]: Start difference. First operand has 279 places, 391 transitions, 4562 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:15:12,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 405 transitions, 5428 flow [2024-06-27 20:15:13,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 405 transitions, 5327 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 20:15:13,845 INFO L231 Difference]: Finished difference. Result has 279 places, 393 transitions, 4542 flow [2024-06-27 20:15:13,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4461, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4542, PETRI_PLACES=279, PETRI_TRANSITIONS=393} [2024-06-27 20:15:13,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-27 20:15:13,846 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 393 transitions, 4542 flow [2024-06-27 20:15:13,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:15:13,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:13,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:13,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:15:13,846 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)] === [2024-06-27 20:15:13,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1977518144, now seen corresponding path program 1 times [2024-06-27 20:15:13,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:13,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837934471] [2024-06-27 20:15:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:13,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:14,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:14,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837934471] [2024-06-27 20:15:14,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837934471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:14,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:14,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:14,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805131914] [2024-06-27 20:15:14,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:14,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:14,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:14,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:14,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:14,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:14,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 393 transitions, 4542 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:14,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:14,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:14,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:16,073 INFO L124 PetriNetUnfolderBase]: 4085/6526 cut-off events. [2024-06-27 20:15:16,073 INFO L125 PetriNetUnfolderBase]: For 720536/720536 co-relation queries the response was YES. [2024-06-27 20:15:16,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55882 conditions, 6526 events. 4085/6526 cut-off events. For 720536/720536 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40664 event pairs, 863 based on Foata normal form. 2/6527 useless extension candidates. Maximal degree in co-relation 55753. Up to 6276 conditions per place. [2024-06-27 20:15:16,163 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 384 selfloop transitions, 35 changer transitions 0/423 dead transitions. [2024-06-27 20:15:16,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 423 transitions, 5661 flow [2024-06-27 20:15:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:15:16,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:15:16,164 INFO L175 Difference]: Start difference. First operand has 279 places, 393 transitions, 4542 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:15:16,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 423 transitions, 5661 flow [2024-06-27 20:15:17,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 423 transitions, 5596 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:17,747 INFO L231 Difference]: Finished difference. Result has 281 places, 396 transitions, 4596 flow [2024-06-27 20:15:17,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4596, PETRI_PLACES=281, PETRI_TRANSITIONS=396} [2024-06-27 20:15:17,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-27 20:15:17,748 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 396 transitions, 4596 flow [2024-06-27 20:15:17,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:17,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:17,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:17,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:15:17,748 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)] === [2024-06-27 20:15:17,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:17,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1983232064, now seen corresponding path program 2 times [2024-06-27 20:15:17,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:17,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665250820] [2024-06-27 20:15:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:17,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:18,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:18,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665250820] [2024-06-27 20:15:18,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665250820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:18,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:18,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:18,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146103219] [2024-06-27 20:15:18,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:18,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:18,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:18,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:18,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:18,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:18,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 396 transitions, 4596 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:18,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:18,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:18,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:19,862 INFO L124 PetriNetUnfolderBase]: 4095/6542 cut-off events. [2024-06-27 20:15:19,862 INFO L125 PetriNetUnfolderBase]: For 730967/730967 co-relation queries the response was YES. [2024-06-27 20:15:19,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56184 conditions, 6542 events. 4095/6542 cut-off events. For 730967/730967 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40796 event pairs, 855 based on Foata normal form. 1/6542 useless extension candidates. Maximal degree in co-relation 56054. Up to 6322 conditions per place. [2024-06-27 20:15:19,943 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 391 selfloop transitions, 30 changer transitions 0/425 dead transitions. [2024-06-27 20:15:19,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 425 transitions, 5578 flow [2024-06-27 20:15:19,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:15:19,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 20:15:19,944 INFO L175 Difference]: Start difference. First operand has 281 places, 396 transitions, 4596 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:15:19,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 425 transitions, 5578 flow [2024-06-27 20:15:21,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 425 transitions, 5499 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:15:21,846 INFO L231 Difference]: Finished difference. Result has 284 places, 402 transitions, 4671 flow [2024-06-27 20:15:21,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4524, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4671, PETRI_PLACES=284, PETRI_TRANSITIONS=402} [2024-06-27 20:15:21,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-27 20:15:21,846 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 402 transitions, 4671 flow [2024-06-27 20:15:21,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:21,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:21,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:21,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:15:21,847 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)] === [2024-06-27 20:15:21,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:21,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1974658208, now seen corresponding path program 1 times [2024-06-27 20:15:21,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:21,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34394937] [2024-06-27 20:15:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:21,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:22,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:22,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34394937] [2024-06-27 20:15:22,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34394937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:22,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:22,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:22,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891467186] [2024-06-27 20:15:22,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:22,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:22,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:22,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:22,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:23,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:23,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 402 transitions, 4671 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:23,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:23,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:23,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:24,424 INFO L124 PetriNetUnfolderBase]: 4103/6554 cut-off events. [2024-06-27 20:15:24,424 INFO L125 PetriNetUnfolderBase]: For 749915/749915 co-relation queries the response was YES. [2024-06-27 20:15:24,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56399 conditions, 6554 events. 4103/6554 cut-off events. For 749915/749915 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 40642 event pairs, 709 based on Foata normal form. 2/6555 useless extension candidates. Maximal degree in co-relation 56268. Up to 6286 conditions per place. [2024-06-27 20:15:24,498 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 397 selfloop transitions, 32 changer transitions 0/433 dead transitions. [2024-06-27 20:15:24,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 433 transitions, 5814 flow [2024-06-27 20:15:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:24,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:15:24,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-27 20:15:24,509 INFO L175 Difference]: Start difference. First operand has 284 places, 402 transitions, 4671 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:15:24,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 433 transitions, 5814 flow [2024-06-27 20:15:26,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 433 transitions, 5738 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:15:26,081 INFO L231 Difference]: Finished difference. Result has 287 places, 404 transitions, 4699 flow [2024-06-27 20:15:26,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4595, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4699, PETRI_PLACES=287, PETRI_TRANSITIONS=404} [2024-06-27 20:15:26,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-27 20:15:26,081 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 404 transitions, 4699 flow [2024-06-27 20:15:26,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:26,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:26,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:26,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:15:26,082 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:26,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:26,082 INFO L85 PathProgramCache]: Analyzing trace with hash -815359118, now seen corresponding path program 2 times [2024-06-27 20:15:26,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:26,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298797732] [2024-06-27 20:15:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:26,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:26,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:26,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298797732] [2024-06-27 20:15:26,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298797732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:26,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:26,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:26,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175730274] [2024-06-27 20:15:26,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:26,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:26,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:26,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:26,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:27,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:27,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 404 transitions, 4699 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:27,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:27,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:27,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:28,353 INFO L124 PetriNetUnfolderBase]: 4111/6566 cut-off events. [2024-06-27 20:15:28,353 INFO L125 PetriNetUnfolderBase]: For 764812/764812 co-relation queries the response was YES. [2024-06-27 20:15:28,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56680 conditions, 6566 events. 4111/6566 cut-off events. For 764812/764812 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40944 event pairs, 853 based on Foata normal form. 2/6567 useless extension candidates. Maximal degree in co-relation 56548. Up to 6343 conditions per place. [2024-06-27 20:15:28,694 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 397 selfloop transitions, 29 changer transitions 0/430 dead transitions. [2024-06-27 20:15:28,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 430 transitions, 5650 flow [2024-06-27 20:15:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:15:28,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 20:15:28,695 INFO L175 Difference]: Start difference. First operand has 287 places, 404 transitions, 4699 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:15:28,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 430 transitions, 5650 flow [2024-06-27 20:15:30,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 430 transitions, 5560 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:30,487 INFO L231 Difference]: Finished difference. Result has 289 places, 406 transitions, 4715 flow [2024-06-27 20:15:30,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4613, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4715, PETRI_PLACES=289, PETRI_TRANSITIONS=406} [2024-06-27 20:15:30,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-27 20:15:30,488 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 406 transitions, 4715 flow [2024-06-27 20:15:30,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:30,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:30,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:30,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:15:30,488 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:30,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:30,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1711589912, now seen corresponding path program 1 times [2024-06-27 20:15:30,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:30,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094778300] [2024-06-27 20:15:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:30,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:31,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:31,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094778300] [2024-06-27 20:15:31,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094778300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:31,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:31,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:31,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545119399] [2024-06-27 20:15:31,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:31,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:31,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:31,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:31,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:31,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:31,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 406 transitions, 4715 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:31,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:31,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:31,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:32,426 INFO L124 PetriNetUnfolderBase]: 4163/6638 cut-off events. [2024-06-27 20:15:32,427 INFO L125 PetriNetUnfolderBase]: For 806866/806866 co-relation queries the response was YES. [2024-06-27 20:15:32,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57811 conditions, 6638 events. 4163/6638 cut-off events. For 806866/806866 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 41357 event pairs, 845 based on Foata normal form. 4/6641 useless extension candidates. Maximal degree in co-relation 57678. Up to 6281 conditions per place. [2024-06-27 20:15:32,514 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 392 selfloop transitions, 49 changer transitions 0/445 dead transitions. [2024-06-27 20:15:32,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 445 transitions, 6117 flow [2024-06-27 20:15:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:15:32,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:15:32,515 INFO L175 Difference]: Start difference. First operand has 289 places, 406 transitions, 4715 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:15:32,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 445 transitions, 6117 flow [2024-06-27 20:15:34,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 445 transitions, 6038 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:34,254 INFO L231 Difference]: Finished difference. Result has 292 places, 420 transitions, 4997 flow [2024-06-27 20:15:34,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4636, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4997, PETRI_PLACES=292, PETRI_TRANSITIONS=420} [2024-06-27 20:15:34,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-27 20:15:34,254 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 420 transitions, 4997 flow [2024-06-27 20:15:34,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:34,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:34,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:34,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:15:34,255 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:34,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:34,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2024490410, now seen corresponding path program 2 times [2024-06-27 20:15:34,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:34,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494189801] [2024-06-27 20:15:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:34,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:34,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494189801] [2024-06-27 20:15:34,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494189801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:34,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:34,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:34,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809780140] [2024-06-27 20:15:34,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:34,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:34,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:34,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:34,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 420 transitions, 4997 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:34,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:34,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:34,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:36,208 INFO L124 PetriNetUnfolderBase]: 4173/6660 cut-off events. [2024-06-27 20:15:36,208 INFO L125 PetriNetUnfolderBase]: For 820884/820884 co-relation queries the response was YES. [2024-06-27 20:15:36,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58916 conditions, 6660 events. 4173/6660 cut-off events. For 820884/820884 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 41637 event pairs, 848 based on Foata normal form. 2/6661 useless extension candidates. Maximal degree in co-relation 58781. Up to 6441 conditions per place. [2024-06-27 20:15:36,297 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 410 selfloop transitions, 28 changer transitions 0/442 dead transitions. [2024-06-27 20:15:36,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 442 transitions, 6020 flow [2024-06-27 20:15:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:36,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:15:36,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:15:36,299 INFO L175 Difference]: Start difference. First operand has 292 places, 420 transitions, 4997 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:15:36,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 442 transitions, 6020 flow [2024-06-27 20:15:38,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 442 transitions, 5876 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:38,409 INFO L231 Difference]: Finished difference. Result has 297 places, 424 transitions, 5012 flow [2024-06-27 20:15:38,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4865, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5012, PETRI_PLACES=297, PETRI_TRANSITIONS=424} [2024-06-27 20:15:38,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-27 20:15:38,410 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 424 transitions, 5012 flow [2024-06-27 20:15:38,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:38,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:38,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:38,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:15:38,411 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:38,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2024727560, now seen corresponding path program 3 times [2024-06-27 20:15:38,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:38,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800287688] [2024-06-27 20:15:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:38,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:38,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:38,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800287688] [2024-06-27 20:15:38,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800287688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:38,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:38,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:38,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051957130] [2024-06-27 20:15:38,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:38,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:38,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:38,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:38,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:39,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:39,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 424 transitions, 5012 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:39,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:39,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:39,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:40,402 INFO L124 PetriNetUnfolderBase]: 4183/6672 cut-off events. [2024-06-27 20:15:40,402 INFO L125 PetriNetUnfolderBase]: For 837927/837927 co-relation queries the response was YES. [2024-06-27 20:15:40,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59145 conditions, 6672 events. 4183/6672 cut-off events. For 837927/837927 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 41630 event pairs, 845 based on Foata normal form. 2/6673 useless extension candidates. Maximal degree in co-relation 59008. Up to 6441 conditions per place. [2024-06-27 20:15:40,483 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 408 selfloop transitions, 35 changer transitions 0/447 dead transitions. [2024-06-27 20:15:40,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 447 transitions, 6051 flow [2024-06-27 20:15:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:15:40,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 20:15:40,485 INFO L175 Difference]: Start difference. First operand has 297 places, 424 transitions, 5012 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:15:40,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 447 transitions, 6051 flow [2024-06-27 20:15:42,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 447 transitions, 5929 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:15:42,321 INFO L231 Difference]: Finished difference. Result has 300 places, 427 transitions, 5047 flow [2024-06-27 20:15:42,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4890, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5047, PETRI_PLACES=300, PETRI_TRANSITIONS=427} [2024-06-27 20:15:42,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-27 20:15:42,322 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 427 transitions, 5047 flow [2024-06-27 20:15:42,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:42,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:42,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:42,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:15:42,323 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:42,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:42,323 INFO L85 PathProgramCache]: Analyzing trace with hash -528468812, now seen corresponding path program 3 times [2024-06-27 20:15:42,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:42,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157781839] [2024-06-27 20:15:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:42,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:43,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:43,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157781839] [2024-06-27 20:15:43,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157781839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:43,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:43,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:43,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529027347] [2024-06-27 20:15:43,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:43,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:43,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:43,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:43,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:43,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:43,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 427 transitions, 5047 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:43,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:43,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:43,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:44,618 INFO L124 PetriNetUnfolderBase]: 4188/6681 cut-off events. [2024-06-27 20:15:44,618 INFO L125 PetriNetUnfolderBase]: For 849751/849751 co-relation queries the response was YES. [2024-06-27 20:15:44,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59397 conditions, 6681 events. 4188/6681 cut-off events. For 849751/849751 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 41738 event pairs, 845 based on Foata normal form. 1/6681 useless extension candidates. Maximal degree in co-relation 59259. Up to 6453 conditions per place. [2024-06-27 20:15:44,700 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 414 selfloop transitions, 29 changer transitions 0/447 dead transitions. [2024-06-27 20:15:44,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 447 transitions, 6024 flow [2024-06-27 20:15:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:15:44,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-27 20:15:44,702 INFO L175 Difference]: Start difference. First operand has 300 places, 427 transitions, 5047 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:15:44,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 447 transitions, 6024 flow [2024-06-27 20:15:47,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 447 transitions, 5895 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:47,636 INFO L231 Difference]: Finished difference. Result has 302 places, 430 transitions, 5037 flow [2024-06-27 20:15:47,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4918, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5037, PETRI_PLACES=302, PETRI_TRANSITIONS=430} [2024-06-27 20:15:47,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-27 20:15:47,637 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 430 transitions, 5037 flow [2024-06-27 20:15:47,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:47,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:47,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:47,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:15:47,638 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:47,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:47,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1772265514, now seen corresponding path program 3 times [2024-06-27 20:15:47,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:47,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28482758] [2024-06-27 20:15:47,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:47,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:48,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:48,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28482758] [2024-06-27 20:15:48,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28482758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:48,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:48,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:48,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693847245] [2024-06-27 20:15:48,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:48,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:48,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:48,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:48,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:48,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:48,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 430 transitions, 5037 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:48,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:48,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:48,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:50,114 INFO L124 PetriNetUnfolderBase]: 4196/6689 cut-off events. [2024-06-27 20:15:50,115 INFO L125 PetriNetUnfolderBase]: For 869681/869681 co-relation queries the response was YES. [2024-06-27 20:15:50,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59558 conditions, 6689 events. 4196/6689 cut-off events. For 869681/869681 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 41718 event pairs, 844 based on Foata normal form. 2/6690 useless extension candidates. Maximal degree in co-relation 59419. Up to 6462 conditions per place. [2024-06-27 20:15:50,192 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 418 selfloop transitions, 28 changer transitions 0/450 dead transitions. [2024-06-27 20:15:50,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 450 transitions, 6012 flow [2024-06-27 20:15:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:15:50,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-27 20:15:50,193 INFO L175 Difference]: Start difference. First operand has 302 places, 430 transitions, 5037 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:15:50,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 450 transitions, 6012 flow [2024-06-27 20:15:52,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 450 transitions, 5924 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:52,696 INFO L231 Difference]: Finished difference. Result has 304 places, 432 transitions, 5053 flow [2024-06-27 20:15:52,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4949, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5053, PETRI_PLACES=304, PETRI_TRANSITIONS=432} [2024-06-27 20:15:52,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-27 20:15:52,696 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 432 transitions, 5053 flow [2024-06-27 20:15:52,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:52,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:52,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:52,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:15:52,697 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:52,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:52,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2014186186, now seen corresponding path program 4 times [2024-06-27 20:15:52,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:52,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259473778] [2024-06-27 20:15:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:52,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:53,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:53,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259473778] [2024-06-27 20:15:53,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259473778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:53,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:53,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:53,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252742861] [2024-06-27 20:15:53,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:53,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:53,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:53,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:53,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:53,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:53,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 432 transitions, 5053 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:53,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:53,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:53,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:54,696 INFO L124 PetriNetUnfolderBase]: 4232/6745 cut-off events. [2024-06-27 20:15:54,696 INFO L125 PetriNetUnfolderBase]: For 906610/906614 co-relation queries the response was YES. [2024-06-27 20:15:54,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60463 conditions, 6745 events. 4232/6745 cut-off events. For 906610/906614 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42171 event pairs, 850 based on Foata normal form. 8/6752 useless extension candidates. Maximal degree in co-relation 60323. Up to 6102 conditions per place. [2024-06-27 20:15:54,781 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 382 selfloop transitions, 94 changer transitions 0/480 dead transitions. [2024-06-27 20:15:54,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 480 transitions, 6832 flow [2024-06-27 20:15:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:15:54,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 20:15:54,783 INFO L175 Difference]: Start difference. First operand has 304 places, 432 transitions, 5053 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:15:54,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 480 transitions, 6832 flow [2024-06-27 20:15:57,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 480 transitions, 6751 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:57,481 INFO L231 Difference]: Finished difference. Result has 307 places, 452 transitions, 5493 flow [2024-06-27 20:15:57,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4972, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5493, PETRI_PLACES=307, PETRI_TRANSITIONS=452} [2024-06-27 20:15:57,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-27 20:15:57,491 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 452 transitions, 5493 flow [2024-06-27 20:15:57,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:57,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:57,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:57,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:15:57,492 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:15:57,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:57,492 INFO L85 PathProgramCache]: Analyzing trace with hash 684130910, now seen corresponding path program 5 times [2024-06-27 20:15:57,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:57,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991373759] [2024-06-27 20:15:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:57,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:58,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991373759] [2024-06-27 20:15:58,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991373759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:58,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:58,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:15:58,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574119896] [2024-06-27 20:15:58,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:58,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:15:58,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:58,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:15:58,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:15:58,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:15:58,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 452 transitions, 5493 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:58,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:58,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:15:58,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:59,692 INFO L124 PetriNetUnfolderBase]: 4284/6821 cut-off events. [2024-06-27 20:15:59,692 INFO L125 PetriNetUnfolderBase]: For 950934/950938 co-relation queries the response was YES. [2024-06-27 20:15:59,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62816 conditions, 6821 events. 4284/6821 cut-off events. For 950934/950938 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 42712 event pairs, 843 based on Foata normal form. 8/6828 useless extension candidates. Maximal degree in co-relation 62674. Up to 6142 conditions per place. [2024-06-27 20:15:59,788 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 370 selfloop transitions, 112 changer transitions 0/486 dead transitions. [2024-06-27 20:15:59,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 486 transitions, 7250 flow [2024-06-27 20:15:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:15:59,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 20:15:59,789 INFO L175 Difference]: Start difference. First operand has 307 places, 452 transitions, 5493 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:15:59,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 486 transitions, 7250 flow [2024-06-27 20:16:02,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 486 transitions, 7027 flow, removed 94 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:02,224 INFO L231 Difference]: Finished difference. Result has 313 places, 462 transitions, 5781 flow [2024-06-27 20:16:02,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5324, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5781, PETRI_PLACES=313, PETRI_TRANSITIONS=462} [2024-06-27 20:16:02,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-27 20:16:02,225 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 462 transitions, 5781 flow [2024-06-27 20:16:02,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:02,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:02,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:02,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:16:02,225 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:02,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:02,226 INFO L85 PathProgramCache]: Analyzing trace with hash 683715200, now seen corresponding path program 6 times [2024-06-27 20:16:02,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:02,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375236560] [2024-06-27 20:16:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:02,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:02,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:02,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375236560] [2024-06-27 20:16:02,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375236560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:02,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:02,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:02,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931812809] [2024-06-27 20:16:02,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:02,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:02,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:02,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:02,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:02,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:02,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 462 transitions, 5781 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:02,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:02,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:02,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:04,285 INFO L124 PetriNetUnfolderBase]: 4272/6807 cut-off events. [2024-06-27 20:16:04,286 INFO L125 PetriNetUnfolderBase]: For 945898/945902 co-relation queries the response was YES. [2024-06-27 20:16:04,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62246 conditions, 6807 events. 4272/6807 cut-off events. For 945898/945902 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 42621 event pairs, 845 based on Foata normal form. 8/6814 useless extension candidates. Maximal degree in co-relation 62101. Up to 6134 conditions per place. [2024-06-27 20:16:04,379 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 375 selfloop transitions, 108 changer transitions 0/487 dead transitions. [2024-06-27 20:16:04,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 487 transitions, 7122 flow [2024-06-27 20:16:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:16:04,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 20:16:04,381 INFO L175 Difference]: Start difference. First operand has 313 places, 462 transitions, 5781 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:16:04,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 487 transitions, 7122 flow [2024-06-27 20:16:07,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 487 transitions, 6849 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:07,195 INFO L231 Difference]: Finished difference. Result has 317 places, 462 transitions, 5732 flow [2024-06-27 20:16:07,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5508, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5732, PETRI_PLACES=317, PETRI_TRANSITIONS=462} [2024-06-27 20:16:07,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-27 20:16:07,196 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 462 transitions, 5732 flow [2024-06-27 20:16:07,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:07,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:07,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:07,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:16:07,197 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:07,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:07,197 INFO L85 PathProgramCache]: Analyzing trace with hash 612165284, now seen corresponding path program 7 times [2024-06-27 20:16:07,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:07,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249493102] [2024-06-27 20:16:07,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:07,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:07,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:07,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249493102] [2024-06-27 20:16:07,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249493102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:07,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:07,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:07,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407691975] [2024-06-27 20:16:07,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:07,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:07,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:07,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:07,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:07,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:07,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 462 transitions, 5732 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:07,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:07,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:07,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:09,298 INFO L124 PetriNetUnfolderBase]: 4298/6847 cut-off events. [2024-06-27 20:16:09,298 INFO L125 PetriNetUnfolderBase]: For 964224/964228 co-relation queries the response was YES. [2024-06-27 20:16:09,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62876 conditions, 6847 events. 4298/6847 cut-off events. For 964224/964228 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 42861 event pairs, 838 based on Foata normal form. 6/6852 useless extension candidates. Maximal degree in co-relation 62730. Up to 6596 conditions per place. [2024-06-27 20:16:09,389 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 443 selfloop transitions, 37 changer transitions 0/484 dead transitions. [2024-06-27 20:16:09,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 484 transitions, 7144 flow [2024-06-27 20:16:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:16:09,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 20:16:09,391 INFO L175 Difference]: Start difference. First operand has 317 places, 462 transitions, 5732 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:16:09,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 484 transitions, 7144 flow [2024-06-27 20:16:12,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 484 transitions, 6957 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:12,122 INFO L231 Difference]: Finished difference. Result has 321 places, 470 transitions, 5850 flow [2024-06-27 20:16:12,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5555, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5850, PETRI_PLACES=321, PETRI_TRANSITIONS=470} [2024-06-27 20:16:12,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-27 20:16:12,123 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 470 transitions, 5850 flow [2024-06-27 20:16:12,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:12,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:12,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:12,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:16:12,124 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:12,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash 793148106, now seen corresponding path program 8 times [2024-06-27 20:16:12,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:12,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283238388] [2024-06-27 20:16:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:12,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:12,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:12,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283238388] [2024-06-27 20:16:12,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283238388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:12,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:12,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:12,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260300407] [2024-06-27 20:16:12,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:12,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:12,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:12,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:12,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:12,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:12,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 470 transitions, 5850 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:12,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:12,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:12,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:14,398 INFO L124 PetriNetUnfolderBase]: 4308/6863 cut-off events. [2024-06-27 20:16:14,398 INFO L125 PetriNetUnfolderBase]: For 983618/983622 co-relation queries the response was YES. [2024-06-27 20:16:14,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63089 conditions, 6863 events. 4308/6863 cut-off events. For 983618/983622 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 43006 event pairs, 838 based on Foata normal form. 6/6868 useless extension candidates. Maximal degree in co-relation 62941. Up to 6550 conditions per place. [2024-06-27 20:16:14,484 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 433 selfloop transitions, 62 changer transitions 0/499 dead transitions. [2024-06-27 20:16:14,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 499 transitions, 7618 flow [2024-06-27 20:16:14,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:16:14,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:16:14,485 INFO L175 Difference]: Start difference. First operand has 321 places, 470 transitions, 5850 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:16:14,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 499 transitions, 7618 flow [2024-06-27 20:16:17,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 499 transitions, 7506 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:17,227 INFO L231 Difference]: Finished difference. Result has 327 places, 481 transitions, 6204 flow [2024-06-27 20:16:17,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5738, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6204, PETRI_PLACES=327, PETRI_TRANSITIONS=481} [2024-06-27 20:16:17,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-27 20:16:17,227 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 481 transitions, 6204 flow [2024-06-27 20:16:17,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:17,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:17,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:17,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:16:17,228 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:17,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:17,228 INFO L85 PathProgramCache]: Analyzing trace with hash 616016586, now seen corresponding path program 9 times [2024-06-27 20:16:17,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:17,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022965613] [2024-06-27 20:16:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:17,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:17,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:17,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022965613] [2024-06-27 20:16:17,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022965613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:17,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:17,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:17,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005433943] [2024-06-27 20:16:17,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:17,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:17,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:17,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:17,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:17,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 481 transitions, 6204 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:17,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:17,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:17,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:19,402 INFO L124 PetriNetUnfolderBase]: 4302/6853 cut-off events. [2024-06-27 20:16:19,403 INFO L125 PetriNetUnfolderBase]: For 991182/991186 co-relation queries the response was YES. [2024-06-27 20:16:19,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63136 conditions, 6853 events. 4302/6853 cut-off events. For 991182/991186 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42901 event pairs, 836 based on Foata normal form. 6/6858 useless extension candidates. Maximal degree in co-relation 62985. Up to 6603 conditions per place. [2024-06-27 20:16:19,485 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 457 selfloop transitions, 35 changer transitions 0/496 dead transitions. [2024-06-27 20:16:19,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 496 transitions, 7455 flow [2024-06-27 20:16:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:19,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:16:19,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-27 20:16:19,486 INFO L175 Difference]: Start difference. First operand has 327 places, 481 transitions, 6204 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:16:19,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 496 transitions, 7455 flow [2024-06-27 20:16:22,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 496 transitions, 7328 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:22,727 INFO L231 Difference]: Finished difference. Result has 332 places, 481 transitions, 6154 flow [2024-06-27 20:16:22,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6077, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6154, PETRI_PLACES=332, PETRI_TRANSITIONS=481} [2024-06-27 20:16:22,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-27 20:16:22,728 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 481 transitions, 6154 flow [2024-06-27 20:16:22,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:22,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:22,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:22,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:16:22,729 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:22,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:22,729 INFO L85 PathProgramCache]: Analyzing trace with hash 793563816, now seen corresponding path program 10 times [2024-06-27 20:16:22,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:22,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921528334] [2024-06-27 20:16:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:22,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:23,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:23,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921528334] [2024-06-27 20:16:23,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921528334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:23,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:23,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:23,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644558333] [2024-06-27 20:16:23,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:23,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:23,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:23,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:23,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:23,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 481 transitions, 6154 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:23,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:23,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:23,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:24,825 INFO L124 PetriNetUnfolderBase]: 4296/6851 cut-off events. [2024-06-27 20:16:24,826 INFO L125 PetriNetUnfolderBase]: For 994296/994300 co-relation queries the response was YES. [2024-06-27 20:16:24,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62881 conditions, 6851 events. 4296/6851 cut-off events. For 994296/994300 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 42973 event pairs, 839 based on Foata normal form. 6/6856 useless extension candidates. Maximal degree in co-relation 62728. Up to 6540 conditions per place. [2024-06-27 20:16:24,931 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 65 changer transitions 0/498 dead transitions. [2024-06-27 20:16:24,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 498 transitions, 7434 flow [2024-06-27 20:16:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:24,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:16:24,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-27 20:16:24,934 INFO L175 Difference]: Start difference. First operand has 332 places, 481 transitions, 6154 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:16:24,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 498 transitions, 7434 flow [2024-06-27 20:16:28,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 498 transitions, 7260 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:28,269 INFO L231 Difference]: Finished difference. Result has 335 places, 481 transitions, 6116 flow [2024-06-27 20:16:28,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5980, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6116, PETRI_PLACES=335, PETRI_TRANSITIONS=481} [2024-06-27 20:16:28,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-27 20:16:28,269 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 481 transitions, 6116 flow [2024-06-27 20:16:28,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:28,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:28,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:28,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:16:28,270 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:28,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:28,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1015751046, now seen corresponding path program 11 times [2024-06-27 20:16:28,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:28,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882220720] [2024-06-27 20:16:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:28,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:28,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:28,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882220720] [2024-06-27 20:16:28,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882220720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:28,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:28,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:28,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248494937] [2024-06-27 20:16:28,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:28,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:28,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:28,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:28,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:28,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:28,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 481 transitions, 6116 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:28,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:28,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:28,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:30,423 INFO L124 PetriNetUnfolderBase]: 4306/6865 cut-off events. [2024-06-27 20:16:30,423 INFO L125 PetriNetUnfolderBase]: For 1011214/1011218 co-relation queries the response was YES. [2024-06-27 20:16:30,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63158 conditions, 6865 events. 4306/6865 cut-off events. For 1011214/1011218 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 43090 event pairs, 839 based on Foata normal form. 6/6870 useless extension candidates. Maximal degree in co-relation 63004. Up to 6628 conditions per place. [2024-06-27 20:16:30,528 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 463 selfloop transitions, 30 changer transitions 0/497 dead transitions. [2024-06-27 20:16:30,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 497 transitions, 7256 flow [2024-06-27 20:16:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:16:30,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 20:16:30,529 INFO L175 Difference]: Start difference. First operand has 335 places, 481 transitions, 6116 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:16:30,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 497 transitions, 7256 flow [2024-06-27 20:16:33,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 497 transitions, 7083 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:16:33,969 INFO L231 Difference]: Finished difference. Result has 336 places, 485 transitions, 6129 flow [2024-06-27 20:16:33,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5955, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6129, PETRI_PLACES=336, PETRI_TRANSITIONS=485} [2024-06-27 20:16:33,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-27 20:16:33,970 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 485 transitions, 6129 flow [2024-06-27 20:16:33,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:33,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:33,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:33,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:16:33,971 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:33,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:33,971 INFO L85 PathProgramCache]: Analyzing trace with hash 615896244, now seen corresponding path program 4 times [2024-06-27 20:16:33,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:33,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083260319] [2024-06-27 20:16:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:33,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:34,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:34,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083260319] [2024-06-27 20:16:34,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083260319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:34,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:34,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:34,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509761134] [2024-06-27 20:16:34,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:34,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:34,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:34,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:34,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 485 transitions, 6129 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:34,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:34,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:34,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:36,218 INFO L124 PetriNetUnfolderBase]: 4286/6825 cut-off events. [2024-06-27 20:16:36,218 INFO L125 PetriNetUnfolderBase]: For 1016882/1016884 co-relation queries the response was YES. [2024-06-27 20:16:36,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62758 conditions, 6825 events. 4286/6825 cut-off events. For 1016882/1016884 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42714 event pairs, 842 based on Foata normal form. 1/6824 useless extension candidates. Maximal degree in co-relation 62604. Up to 6586 conditions per place. [2024-06-27 20:16:36,317 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 463 selfloop transitions, 29 changer transitions 0/496 dead transitions. [2024-06-27 20:16:36,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 496 transitions, 7139 flow [2024-06-27 20:16:36,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:36,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:16:36,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 20:16:36,319 INFO L175 Difference]: Start difference. First operand has 336 places, 485 transitions, 6129 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:16:36,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 496 transitions, 7139 flow [2024-06-27 20:16:40,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 496 transitions, 7013 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:40,278 INFO L231 Difference]: Finished difference. Result has 339 places, 485 transitions, 6067 flow [2024-06-27 20:16:40,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6003, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6067, PETRI_PLACES=339, PETRI_TRANSITIONS=485} [2024-06-27 20:16:40,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-27 20:16:40,278 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 485 transitions, 6067 flow [2024-06-27 20:16:40,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:40,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:40,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:40,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:16:40,279 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:40,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1135996812, now seen corresponding path program 12 times [2024-06-27 20:16:40,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:40,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991685044] [2024-06-27 20:16:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:40,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:40,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:40,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991685044] [2024-06-27 20:16:40,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991685044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:40,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:40,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:40,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453197087] [2024-06-27 20:16:40,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:40,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:40,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:40,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:40,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:40,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:40,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 485 transitions, 6067 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:40,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:40,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:40,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:42,408 INFO L124 PetriNetUnfolderBase]: 4280/6830 cut-off events. [2024-06-27 20:16:42,409 INFO L125 PetriNetUnfolderBase]: For 1027788/1027792 co-relation queries the response was YES. [2024-06-27 20:16:42,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62534 conditions, 6830 events. 4280/6830 cut-off events. For 1027788/1027792 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 42887 event pairs, 838 based on Foata normal form. 6/6835 useless extension candidates. Maximal degree in co-relation 62379. Up to 6587 conditions per place. [2024-06-27 20:16:42,508 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 464 selfloop transitions, 29 changer transitions 0/497 dead transitions. [2024-06-27 20:16:42,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 497 transitions, 7093 flow [2024-06-27 20:16:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:16:42,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-27 20:16:42,509 INFO L175 Difference]: Start difference. First operand has 339 places, 485 transitions, 6067 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:16:42,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 497 transitions, 7093 flow [2024-06-27 20:16:45,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 497 transitions, 6914 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-27 20:16:45,990 INFO L231 Difference]: Finished difference. Result has 338 places, 485 transitions, 5952 flow [2024-06-27 20:16:45,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5888, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5952, PETRI_PLACES=338, PETRI_TRANSITIONS=485} [2024-06-27 20:16:45,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-27 20:16:45,991 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 485 transitions, 5952 flow [2024-06-27 20:16:45,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:45,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:45,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:45,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:16:45,991 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:45,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash 615893268, now seen corresponding path program 4 times [2024-06-27 20:16:45,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:45,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163262965] [2024-06-27 20:16:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:45,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:46,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:46,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163262965] [2024-06-27 20:16:46,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163262965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:46,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:46,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:46,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805828118] [2024-06-27 20:16:46,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:46,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:46,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:46,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:46,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:46,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:16:46,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 485 transitions, 5952 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:46,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:46,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:16:46,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:48,374 INFO L124 PetriNetUnfolderBase]: 4275/6810 cut-off events. [2024-06-27 20:16:48,374 INFO L125 PetriNetUnfolderBase]: For 1033238/1033240 co-relation queries the response was YES. [2024-06-27 20:16:48,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62290 conditions, 6810 events. 4275/6810 cut-off events. For 1033238/1033240 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42598 event pairs, 847 based on Foata normal form. 2/6810 useless extension candidates. Maximal degree in co-relation 62134. Up to 6568 conditions per place. [2024-06-27 20:16:48,478 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 465 selfloop transitions, 28 changer transitions 0/497 dead transitions. [2024-06-27 20:16:48,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 497 transitions, 6966 flow [2024-06-27 20:16:48,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:48,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:16:48,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 20:16:48,480 INFO L175 Difference]: Start difference. First operand has 338 places, 485 transitions, 5952 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:16:48,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 497 transitions, 6966 flow [2024-06-27 20:16:51,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 497 transitions, 6852 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:16:51,960 INFO L231 Difference]: Finished difference. Result has 338 places, 485 transitions, 5899 flow [2024-06-27 20:16:51,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5838, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5899, PETRI_PLACES=338, PETRI_TRANSITIONS=485} [2024-06-27 20:16:51,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-27 20:16:51,961 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 485 transitions, 5899 flow [2024-06-27 20:16:51,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:51,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:51,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:51,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:16:51,961 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:51,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2044420308, now seen corresponding path program 1 times [2024-06-27 20:16:51,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:51,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845892720] [2024-06-27 20:16:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:51,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:52,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:52,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845892720] [2024-06-27 20:16:52,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845892720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:52,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:52,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:52,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334807298] [2024-06-27 20:16:52,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:52,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:52,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:52,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:52,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:52,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:16:52,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 485 transitions, 5899 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 20:16:52,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:52,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:16:52,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:54,126 INFO L124 PetriNetUnfolderBase]: 4146/6689 cut-off events. [2024-06-27 20:16:54,127 INFO L125 PetriNetUnfolderBase]: For 919091/919101 co-relation queries the response was YES. [2024-06-27 20:16:54,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59306 conditions, 6689 events. 4146/6689 cut-off events. For 919091/919101 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 42701 event pairs, 733 based on Foata normal form. 2/6682 useless extension candidates. Maximal degree in co-relation 59149. Up to 6263 conditions per place. [2024-06-27 20:16:54,226 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 453 selfloop transitions, 29 changer transitions 0/512 dead transitions. [2024-06-27 20:16:54,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 512 transitions, 7341 flow [2024-06-27 20:16:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:54,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:16:54,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:16:54,227 INFO L175 Difference]: Start difference. First operand has 338 places, 485 transitions, 5899 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:16:54,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 512 transitions, 7341 flow [2024-06-27 20:16:57,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 512 transitions, 7266 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:16:57,738 INFO L231 Difference]: Finished difference. Result has 339 places, 489 transitions, 6099 flow [2024-06-27 20:16:57,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5824, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6099, PETRI_PLACES=339, PETRI_TRANSITIONS=489} [2024-06-27 20:16:57,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-27 20:16:57,739 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 489 transitions, 6099 flow [2024-06-27 20:16:57,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 20:16:57,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:57,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:57,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:16:57,740 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:57,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:57,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2044359734, now seen corresponding path program 1 times [2024-06-27 20:16:57,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:57,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680697434] [2024-06-27 20:16:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:57,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:58,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:58,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680697434] [2024-06-27 20:16:58,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680697434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:58,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:58,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:58,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784160520] [2024-06-27 20:16:58,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:58,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:58,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:58,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:16:58,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 489 transitions, 6099 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 20:16:58,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:58,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:16:58,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:59,961 INFO L124 PetriNetUnfolderBase]: 4164/6716 cut-off events. [2024-06-27 20:16:59,961 INFO L125 PetriNetUnfolderBase]: For 941494/941504 co-relation queries the response was YES. [2024-06-27 20:17:00,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59878 conditions, 6716 events. 4164/6716 cut-off events. For 941494/941504 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 42917 event pairs, 776 based on Foata normal form. 2/6709 useless extension candidates. Maximal degree in co-relation 59720. Up to 6216 conditions per place. [2024-06-27 20:17:00,062 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 423 selfloop transitions, 66 changer transitions 0/519 dead transitions. [2024-06-27 20:17:00,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 519 transitions, 7457 flow [2024-06-27 20:17:00,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:17:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:17:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 20:17:00,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:17:00,064 INFO L175 Difference]: Start difference. First operand has 339 places, 489 transitions, 6099 flow. Second operand 10 states and 180 transitions. [2024-06-27 20:17:00,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 519 transitions, 7457 flow [2024-06-27 20:17:02,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 519 transitions, 7306 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:02,989 INFO L231 Difference]: Finished difference. Result has 345 places, 495 transitions, 6194 flow [2024-06-27 20:17:02,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5948, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6194, PETRI_PLACES=345, PETRI_TRANSITIONS=495} [2024-06-27 20:17:02,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-27 20:17:02,989 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 495 transitions, 6194 flow [2024-06-27 20:17:02,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 20:17:02,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:02,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:02,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:17:02,990 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:02,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:02,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2044359858, now seen corresponding path program 2 times [2024-06-27 20:17:02,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:02,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149823616] [2024-06-27 20:17:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:02,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:03,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:03,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149823616] [2024-06-27 20:17:03,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149823616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:03,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:03,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:03,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996946538] [2024-06-27 20:17:03,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:03,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:03,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:03,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:03,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:03,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:17:03,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 495 transitions, 6194 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 20:17:03,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:03,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:17:03,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:05,316 INFO L124 PetriNetUnfolderBase]: 4160/6710 cut-off events. [2024-06-27 20:17:05,316 INFO L125 PetriNetUnfolderBase]: For 949487/949497 co-relation queries the response was YES. [2024-06-27 20:17:05,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60099 conditions, 6710 events. 4160/6710 cut-off events. For 949487/949497 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 42879 event pairs, 774 based on Foata normal form. 2/6703 useless extension candidates. Maximal degree in co-relation 59939. Up to 6317 conditions per place. [2024-06-27 20:17:05,417 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 456 selfloop transitions, 28 changer transitions 0/514 dead transitions. [2024-06-27 20:17:05,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 514 transitions, 7208 flow [2024-06-27 20:17:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:05,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:05,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:17:05,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 20:17:05,419 INFO L175 Difference]: Start difference. First operand has 345 places, 495 transitions, 6194 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:17:05,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 514 transitions, 7208 flow [2024-06-27 20:17:08,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 514 transitions, 7016 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:08,989 INFO L231 Difference]: Finished difference. Result has 348 places, 495 transitions, 6063 flow [2024-06-27 20:17:08,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6002, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6063, PETRI_PLACES=348, PETRI_TRANSITIONS=495} [2024-06-27 20:17:08,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-27 20:17:08,990 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 495 transitions, 6063 flow [2024-06-27 20:17:08,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 20:17:08,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:08,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:08,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:17:08,991 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:08,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:08,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1926272054, now seen corresponding path program 2 times [2024-06-27 20:17:08,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:08,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941095330] [2024-06-27 20:17:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:08,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:09,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:09,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941095330] [2024-06-27 20:17:09,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941095330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:09,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:09,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:09,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681304036] [2024-06-27 20:17:09,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:09,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:09,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:09,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:09,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:17:09,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 495 transitions, 6063 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 20:17:09,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:09,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:17:09,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:11,274 INFO L124 PetriNetUnfolderBase]: 4175/6731 cut-off events. [2024-06-27 20:17:11,275 INFO L125 PetriNetUnfolderBase]: For 964785/964795 co-relation queries the response was YES. [2024-06-27 20:17:11,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60275 conditions, 6731 events. 4175/6731 cut-off events. For 964785/964795 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 43054 event pairs, 772 based on Foata normal form. 2/6722 useless extension candidates. Maximal degree in co-relation 60113. Up to 6229 conditions per place. [2024-06-27 20:17:11,382 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 425 selfloop transitions, 79 changer transitions 0/534 dead transitions. [2024-06-27 20:17:11,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 534 transitions, 8055 flow [2024-06-27 20:17:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:11,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:17:11,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-27 20:17:11,384 INFO L175 Difference]: Start difference. First operand has 348 places, 495 transitions, 6063 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:17:11,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 534 transitions, 8055 flow [2024-06-27 20:17:15,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 534 transitions, 7989 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:17:15,043 INFO L231 Difference]: Finished difference. Result has 351 places, 507 transitions, 6512 flow [2024-06-27 20:17:15,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5997, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6512, PETRI_PLACES=351, PETRI_TRANSITIONS=507} [2024-06-27 20:17:15,044 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-27 20:17:15,044 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 507 transitions, 6512 flow [2024-06-27 20:17:15,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 20:17:15,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:15,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:15,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:17:15,044 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:15,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:15,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1926267404, now seen corresponding path program 3 times [2024-06-27 20:17:15,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:15,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122333421] [2024-06-27 20:17:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:15,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:15,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:15,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122333421] [2024-06-27 20:17:15,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122333421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:15,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:15,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:15,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904527885] [2024-06-27 20:17:15,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:15,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:15,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:15,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:15,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:15,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:17:15,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 507 transitions, 6512 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 20:17:15,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:15,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:17:15,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:17,351 INFO L124 PetriNetUnfolderBase]: 4190/6755 cut-off events. [2024-06-27 20:17:17,352 INFO L125 PetriNetUnfolderBase]: For 993993/994003 co-relation queries the response was YES. [2024-06-27 20:17:17,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61613 conditions, 6755 events. 4190/6755 cut-off events. For 993993/994003 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 43206 event pairs, 771 based on Foata normal form. 2/6748 useless extension candidates. Maximal degree in co-relation 61447. Up to 6302 conditions per place. [2024-06-27 20:17:17,451 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 439 selfloop transitions, 62 changer transitions 0/531 dead transitions. [2024-06-27 20:17:17,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 531 transitions, 7629 flow [2024-06-27 20:17:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:17,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:17:17,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 20:17:17,452 INFO L175 Difference]: Start difference. First operand has 351 places, 507 transitions, 6512 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:17:17,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 531 transitions, 7629 flow [2024-06-27 20:17:21,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 531 transitions, 7549 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-27 20:17:21,126 INFO L231 Difference]: Finished difference. Result has 357 places, 510 transitions, 6626 flow [2024-06-27 20:17:21,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6432, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6626, PETRI_PLACES=357, PETRI_TRANSITIONS=510} [2024-06-27 20:17:21,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-27 20:17:21,126 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 510 transitions, 6626 flow [2024-06-27 20:17:21,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-27 20:17:21,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:21,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:21,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:17:21,127 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:21,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:21,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1926094424, now seen corresponding path program 4 times [2024-06-27 20:17:21,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:21,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166658943] [2024-06-27 20:17:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:21,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:21,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:21,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166658943] [2024-06-27 20:17:21,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166658943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:21,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:21,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:21,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493687247] [2024-06-27 20:17:21,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:21,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:21,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:21,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:21,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:22,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:17:22,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 510 transitions, 6626 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:22,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:22,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:17:22,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:23,617 INFO L124 PetriNetUnfolderBase]: 4203/6774 cut-off events. [2024-06-27 20:17:23,617 INFO L125 PetriNetUnfolderBase]: For 1016610/1016620 co-relation queries the response was YES. [2024-06-27 20:17:23,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62066 conditions, 6774 events. 4203/6774 cut-off events. For 1016610/1016620 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 43335 event pairs, 773 based on Foata normal form. 3/6768 useless extension candidates. Maximal degree in co-relation 61898. Up to 6320 conditions per place. [2024-06-27 20:17:23,720 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 445 selfloop transitions, 57 changer transitions 0/532 dead transitions. [2024-06-27 20:17:23,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 532 transitions, 7745 flow [2024-06-27 20:17:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:17:23,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 20:17:23,722 INFO L175 Difference]: Start difference. First operand has 357 places, 510 transitions, 6626 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:17:23,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 532 transitions, 7745 flow [2024-06-27 20:17:26,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 532 transitions, 7590 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:26,466 INFO L231 Difference]: Finished difference. Result has 360 places, 513 transitions, 6661 flow [2024-06-27 20:17:26,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6471, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6661, PETRI_PLACES=360, PETRI_TRANSITIONS=513} [2024-06-27 20:17:26,466 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-27 20:17:26,466 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 513 transitions, 6661 flow [2024-06-27 20:17:26,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:26,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:26,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:26,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:17:26,467 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:26,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:26,467 INFO L85 PathProgramCache]: Analyzing trace with hash 620751044, now seen corresponding path program 1 times [2024-06-27 20:17:26,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:26,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913592545] [2024-06-27 20:17:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:26,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:27,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:27,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913592545] [2024-06-27 20:17:27,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913592545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:27,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:27,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:27,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898461480] [2024-06-27 20:17:27,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:27,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:27,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:27,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:27,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:27,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:17:27,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 513 transitions, 6661 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:17:27,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:27,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:17:27,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:29,167 INFO L124 PetriNetUnfolderBase]: 4353/6927 cut-off events. [2024-06-27 20:17:29,168 INFO L125 PetriNetUnfolderBase]: For 1156541/1156541 co-relation queries the response was YES. [2024-06-27 20:17:29,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65463 conditions, 6927 events. 4353/6927 cut-off events. For 1156541/1156541 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 43422 event pairs, 832 based on Foata normal form. 1/6927 useless extension candidates. Maximal degree in co-relation 65294. Up to 6711 conditions per place. [2024-06-27 20:17:29,271 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 501 selfloop transitions, 24 changer transitions 0/529 dead transitions. [2024-06-27 20:17:29,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 529 transitions, 7793 flow [2024-06-27 20:17:29,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 20:17:29,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-27 20:17:29,272 INFO L175 Difference]: Start difference. First operand has 360 places, 513 transitions, 6661 flow. Second operand 9 states and 137 transitions. [2024-06-27 20:17:29,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 529 transitions, 7793 flow [2024-06-27 20:17:31,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 529 transitions, 7598 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:31,970 INFO L231 Difference]: Finished difference. Result has 363 places, 518 transitions, 6589 flow [2024-06-27 20:17:31,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6472, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6589, PETRI_PLACES=363, PETRI_TRANSITIONS=518} [2024-06-27 20:17:31,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-27 20:17:31,971 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 518 transitions, 6589 flow [2024-06-27 20:17:31,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:17:31,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:31,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:31,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:17:31,971 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:31,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:31,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1541215978, now seen corresponding path program 5 times [2024-06-27 20:17:31,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:31,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870429845] [2024-06-27 20:17:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:31,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:32,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:32,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870429845] [2024-06-27 20:17:32,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870429845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:32,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:32,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:32,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15242496] [2024-06-27 20:17:32,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:32,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:32,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:32,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:32,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:32,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:17:32,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 518 transitions, 6589 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:32,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:32,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:17:32,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:34,541 INFO L124 PetriNetUnfolderBase]: 4225/6805 cut-off events. [2024-06-27 20:17:34,541 INFO L125 PetriNetUnfolderBase]: For 1042210/1042220 co-relation queries the response was YES. [2024-06-27 20:17:34,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62219 conditions, 6805 events. 4225/6805 cut-off events. For 1042210/1042220 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 43478 event pairs, 776 based on Foata normal form. 3/6799 useless extension candidates. Maximal degree in co-relation 62048. Up to 6419 conditions per place. [2024-06-27 20:17:34,664 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 475 selfloop transitions, 30 changer transitions 0/535 dead transitions. [2024-06-27 20:17:34,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 535 transitions, 7706 flow [2024-06-27 20:17:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:17:34,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-27 20:17:34,665 INFO L175 Difference]: Start difference. First operand has 363 places, 518 transitions, 6589 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:17:34,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 535 transitions, 7706 flow [2024-06-27 20:17:37,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 535 transitions, 7610 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:37,689 INFO L231 Difference]: Finished difference. Result has 365 places, 521 transitions, 6635 flow [2024-06-27 20:17:37,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6493, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6635, PETRI_PLACES=365, PETRI_TRANSITIONS=521} [2024-06-27 20:17:37,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-27 20:17:37,690 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 521 transitions, 6635 flow [2024-06-27 20:17:37,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:37,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:37,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:37,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:17:37,690 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:37,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:37,691 INFO L85 PathProgramCache]: Analyzing trace with hash 793571752, now seen corresponding path program 6 times [2024-06-27 20:17:37,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:37,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571177787] [2024-06-27 20:17:37,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:37,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:38,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:38,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571177787] [2024-06-27 20:17:38,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571177787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:38,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:38,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:38,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870681656] [2024-06-27 20:17:38,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:38,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:38,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:38,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:38,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:17:38,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 521 transitions, 6635 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:38,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:38,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:17:38,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:40,291 INFO L124 PetriNetUnfolderBase]: 4218/6793 cut-off events. [2024-06-27 20:17:40,291 INFO L125 PetriNetUnfolderBase]: For 1038352/1038362 co-relation queries the response was YES. [2024-06-27 20:17:40,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61981 conditions, 6793 events. 4218/6793 cut-off events. For 1038352/1038362 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 43364 event pairs, 771 based on Foata normal form. 3/6785 useless extension candidates. Maximal degree in co-relation 61809. Up to 6406 conditions per place. [2024-06-27 20:17:40,392 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 469 selfloop transitions, 37 changer transitions 0/536 dead transitions. [2024-06-27 20:17:40,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 536 transitions, 7689 flow [2024-06-27 20:17:40,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:17:40,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 20:17:40,399 INFO L175 Difference]: Start difference. First operand has 365 places, 521 transitions, 6635 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:17:40,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 536 transitions, 7689 flow [2024-06-27 20:17:44,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 536 transitions, 7560 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:44,073 INFO L231 Difference]: Finished difference. Result has 367 places, 521 transitions, 6587 flow [2024-06-27 20:17:44,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6506, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6587, PETRI_PLACES=367, PETRI_TRANSITIONS=521} [2024-06-27 20:17:44,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-27 20:17:44,074 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 521 transitions, 6587 flow [2024-06-27 20:17:44,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:44,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:44,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:44,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:17:44,074 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:44,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:44,075 INFO L85 PathProgramCache]: Analyzing trace with hash 486146894, now seen corresponding path program 1 times [2024-06-27 20:17:44,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:44,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523389564] [2024-06-27 20:17:44,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:44,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:44,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:44,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523389564] [2024-06-27 20:17:44,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523389564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:44,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:44,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:44,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556960910] [2024-06-27 20:17:44,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:44,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:44,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:44,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:44,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:45,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:17:45,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 521 transitions, 6587 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:17:45,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:45,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:17:45,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:46,712 INFO L124 PetriNetUnfolderBase]: 4369/6950 cut-off events. [2024-06-27 20:17:46,713 INFO L125 PetriNetUnfolderBase]: For 1197606/1197606 co-relation queries the response was YES. [2024-06-27 20:17:46,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65504 conditions, 6950 events. 4369/6950 cut-off events. For 1197606/1197606 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 43566 event pairs, 831 based on Foata normal form. 2/6951 useless extension candidates. Maximal degree in co-relation 65331. Up to 6609 conditions per place. [2024-06-27 20:17:46,817 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 491 selfloop transitions, 61 changer transitions 0/556 dead transitions. [2024-06-27 20:17:46,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 556 transitions, 8239 flow [2024-06-27 20:17:46,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:46,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:17:46,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 20:17:46,819 INFO L175 Difference]: Start difference. First operand has 367 places, 521 transitions, 6587 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:17:46,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 556 transitions, 8239 flow [2024-06-27 20:17:51,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 556 transitions, 8115 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:17:51,053 INFO L231 Difference]: Finished difference. Result has 368 places, 528 transitions, 6792 flow [2024-06-27 20:17:51,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6463, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6792, PETRI_PLACES=368, PETRI_TRANSITIONS=528} [2024-06-27 20:17:51,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-27 20:17:51,054 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 528 transitions, 6792 flow [2024-06-27 20:17:51,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:17:51,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:51,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:51,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:17:51,054 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:51,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash 589676142, now seen corresponding path program 2 times [2024-06-27 20:17:51,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:51,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87944911] [2024-06-27 20:17:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:51,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:51,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:51,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87944911] [2024-06-27 20:17:51,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87944911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:51,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:51,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:51,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322436968] [2024-06-27 20:17:51,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:51,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:51,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:51,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:51,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:51,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:17:51,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 528 transitions, 6792 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:17:51,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:51,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:17:51,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:53,706 INFO L124 PetriNetUnfolderBase]: 4387/6975 cut-off events. [2024-06-27 20:17:53,706 INFO L125 PetriNetUnfolderBase]: For 1224251/1224251 co-relation queries the response was YES. [2024-06-27 20:17:53,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66563 conditions, 6975 events. 4387/6975 cut-off events. For 1224251/1224251 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 43657 event pairs, 824 based on Foata normal form. 1/6975 useless extension candidates. Maximal degree in co-relation 66389. Up to 6694 conditions per place. [2024-06-27 20:17:53,817 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 502 selfloop transitions, 55 changer transitions 0/561 dead transitions. [2024-06-27 20:17:53,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 561 transitions, 8425 flow [2024-06-27 20:17:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:17:53,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:17:53,818 INFO L175 Difference]: Start difference. First operand has 368 places, 528 transitions, 6792 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:17:53,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 561 transitions, 8425 flow [2024-06-27 20:17:57,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 561 transitions, 8201 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:57,728 INFO L231 Difference]: Finished difference. Result has 373 places, 537 transitions, 6911 flow [2024-06-27 20:17:57,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6600, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6911, PETRI_PLACES=373, PETRI_TRANSITIONS=537} [2024-06-27 20:17:57,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-27 20:17:57,728 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 537 transitions, 6911 flow [2024-06-27 20:17:57,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:17:57,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:57,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:57,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:17:57,729 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:57,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:57,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1350890892, now seen corresponding path program 3 times [2024-06-27 20:17:57,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:57,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61438248] [2024-06-27 20:17:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:57,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:58,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:58,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61438248] [2024-06-27 20:17:58,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61438248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:58,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:58,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:58,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250609915] [2024-06-27 20:17:58,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:58,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:58,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:58,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:58,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:58,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:17:58,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 537 transitions, 6911 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:17:58,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:58,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:17:58,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:00,168 INFO L124 PetriNetUnfolderBase]: 4384/6971 cut-off events. [2024-06-27 20:18:00,169 INFO L125 PetriNetUnfolderBase]: For 1235791/1235791 co-relation queries the response was YES. [2024-06-27 20:18:00,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66495 conditions, 6971 events. 4384/6971 cut-off events. For 1235791/1235791 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 43672 event pairs, 826 based on Foata normal form. 1/6971 useless extension candidates. Maximal degree in co-relation 66319. Up to 6697 conditions per place. [2024-06-27 20:18:00,280 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 506 selfloop transitions, 50 changer transitions 0/560 dead transitions. [2024-06-27 20:18:00,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 560 transitions, 8085 flow [2024-06-27 20:18:00,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:18:00,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:18:00,281 INFO L175 Difference]: Start difference. First operand has 373 places, 537 transitions, 6911 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:18:00,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 560 transitions, 8085 flow [2024-06-27 20:18:05,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 560 transitions, 7889 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-27 20:18:05,225 INFO L231 Difference]: Finished difference. Result has 378 places, 537 transitions, 6821 flow [2024-06-27 20:18:05,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6715, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6821, PETRI_PLACES=378, PETRI_TRANSITIONS=537} [2024-06-27 20:18:05,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-27 20:18:05,225 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 537 transitions, 6821 flow [2024-06-27 20:18:05,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:18:05,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:05,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:05,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:18:05,226 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:05,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:05,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1340175424, now seen corresponding path program 1 times [2024-06-27 20:18:05,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:05,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788376850] [2024-06-27 20:18:05,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:05,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:06,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:06,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788376850] [2024-06-27 20:18:06,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788376850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:06,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:06,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:06,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377283897] [2024-06-27 20:18:06,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:06,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:06,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:06,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:06,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:06,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:18:06,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 537 transitions, 6821 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:18:06,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:06,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:18:06,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:08,068 INFO L124 PetriNetUnfolderBase]: 4392/6983 cut-off events. [2024-06-27 20:18:08,068 INFO L125 PetriNetUnfolderBase]: For 1260344/1260344 co-relation queries the response was YES. [2024-06-27 20:18:08,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66688 conditions, 6983 events. 4392/6983 cut-off events. For 1260344/1260344 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 43539 event pairs, 681 based on Foata normal form. 2/6984 useless extension candidates. Maximal degree in co-relation 66510. Up to 6621 conditions per place. [2024-06-27 20:18:08,183 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 511 selfloop transitions, 56 changer transitions 0/571 dead transitions. [2024-06-27 20:18:08,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 571 transitions, 8327 flow [2024-06-27 20:18:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:18:08,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:18:08,184 INFO L175 Difference]: Start difference. First operand has 378 places, 537 transitions, 6821 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:18:08,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 571 transitions, 8327 flow [2024-06-27 20:18:14,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 571 transitions, 8217 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:14,713 INFO L231 Difference]: Finished difference. Result has 379 places, 541 transitions, 6888 flow [2024-06-27 20:18:14,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6711, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6888, PETRI_PLACES=379, PETRI_TRANSITIONS=541} [2024-06-27 20:18:14,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-27 20:18:14,714 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 541 transitions, 6888 flow [2024-06-27 20:18:14,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:18:14,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:14,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:14,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:18:14,715 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:14,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:14,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1350561486, now seen corresponding path program 2 times [2024-06-27 20:18:14,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:14,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526827324] [2024-06-27 20:18:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:14,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:15,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:15,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526827324] [2024-06-27 20:18:15,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526827324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:15,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:15,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:15,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363363230] [2024-06-27 20:18:15,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:15,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:15,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:15,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:15,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:15,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:18:15,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 541 transitions, 6888 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:18:15,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:15,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:18:15,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:17,400 INFO L124 PetriNetUnfolderBase]: 4413/7008 cut-off events. [2024-06-27 20:18:17,401 INFO L125 PetriNetUnfolderBase]: For 1294786/1294786 co-relation queries the response was YES. [2024-06-27 20:18:17,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67435 conditions, 7008 events. 4413/7008 cut-off events. For 1294786/1294786 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 43903 event pairs, 821 based on Foata normal form. 2/7009 useless extension candidates. Maximal degree in co-relation 67256. Up to 6720 conditions per place. [2024-06-27 20:18:17,517 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 515 selfloop transitions, 52 changer transitions 0/571 dead transitions. [2024-06-27 20:18:17,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 571 transitions, 8394 flow [2024-06-27 20:18:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:17,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:18:17,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:18:17,518 INFO L175 Difference]: Start difference. First operand has 379 places, 541 transitions, 6888 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:18:17,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 571 transitions, 8394 flow [2024-06-27 20:18:23,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 571 transitions, 8273 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:23,275 INFO L231 Difference]: Finished difference. Result has 383 places, 545 transitions, 6944 flow [2024-06-27 20:18:23,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6791, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6944, PETRI_PLACES=383, PETRI_TRANSITIONS=545} [2024-06-27 20:18:23,275 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-27 20:18:23,275 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 545 transitions, 6944 flow [2024-06-27 20:18:23,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:18:23,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:23,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:23,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:18:23,276 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:23,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:23,276 INFO L85 PathProgramCache]: Analyzing trace with hash 493999450, now seen corresponding path program 3 times [2024-06-27 20:18:23,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:23,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225328928] [2024-06-27 20:18:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:23,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:24,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:24,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225328928] [2024-06-27 20:18:24,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225328928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:24,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:24,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:24,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954617803] [2024-06-27 20:18:24,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:24,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:24,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:24,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:24,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:24,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:18:24,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 545 transitions, 6944 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:18:24,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:24,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:18:24,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:26,150 INFO L124 PetriNetUnfolderBase]: 4475/7108 cut-off events. [2024-06-27 20:18:26,150 INFO L125 PetriNetUnfolderBase]: For 1313846/1313846 co-relation queries the response was YES. [2024-06-27 20:18:26,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68424 conditions, 7108 events. 4475/7108 cut-off events. For 1313846/1313846 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 44430 event pairs, 835 based on Foata normal form. 2/7109 useless extension candidates. Maximal degree in co-relation 68243. Up to 6791 conditions per place. [2024-06-27 20:18:26,263 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 523 selfloop transitions, 67 changer transitions 0/594 dead transitions. [2024-06-27 20:18:26,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 594 transitions, 8605 flow [2024-06-27 20:18:26,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 20:18:26,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-27 20:18:26,288 INFO L175 Difference]: Start difference. First operand has 383 places, 545 transitions, 6944 flow. Second operand 10 states and 166 transitions. [2024-06-27 20:18:26,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 594 transitions, 8605 flow [2024-06-27 20:18:30,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 594 transitions, 8508 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:30,817 INFO L231 Difference]: Finished difference. Result has 392 places, 570 transitions, 7429 flow [2024-06-27 20:18:30,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6874, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7429, PETRI_PLACES=392, PETRI_TRANSITIONS=570} [2024-06-27 20:18:30,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-27 20:18:30,818 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 570 transitions, 7429 flow [2024-06-27 20:18:30,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:18:30,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:30,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:30,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:18:30,818 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:30,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash 458031957, now seen corresponding path program 1 times [2024-06-27 20:18:30,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:30,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413979308] [2024-06-27 20:18:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:30,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:31,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:31,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413979308] [2024-06-27 20:18:31,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413979308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:31,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:31,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:31,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149840648] [2024-06-27 20:18:31,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:31,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:31,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:31,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:31,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:31,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:18:31,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 570 transitions, 7429 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:18:31,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:31,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:18:31,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:33,577 INFO L124 PetriNetUnfolderBase]: 4485/7134 cut-off events. [2024-06-27 20:18:33,577 INFO L125 PetriNetUnfolderBase]: For 1336803/1336807 co-relation queries the response was YES. [2024-06-27 20:18:33,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69111 conditions, 7134 events. 4485/7134 cut-off events. For 1336803/1336807 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 44713 event pairs, 826 based on Foata normal form. 6/7139 useless extension candidates. Maximal degree in co-relation 68924. Up to 6744 conditions per place. [2024-06-27 20:18:33,679 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 531 selfloop transitions, 63 changer transitions 0/598 dead transitions. [2024-06-27 20:18:33,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 598 transitions, 8847 flow [2024-06-27 20:18:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:18:33,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 20:18:33,680 INFO L175 Difference]: Start difference. First operand has 392 places, 570 transitions, 7429 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:18:33,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 598 transitions, 8847 flow [2024-06-27 20:18:39,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 598 transitions, 8779 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 20:18:39,218 INFO L231 Difference]: Finished difference. Result has 399 places, 574 transitions, 7664 flow [2024-06-27 20:18:39,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7361, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7664, PETRI_PLACES=399, PETRI_TRANSITIONS=574} [2024-06-27 20:18:39,218 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-27 20:18:39,218 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 574 transitions, 7664 flow [2024-06-27 20:18:39,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:18:39,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:39,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:39,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:18:39,219 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:39,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:39,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1628423408, now seen corresponding path program 1 times [2024-06-27 20:18:39,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:39,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300438187] [2024-06-27 20:18:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:39,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:39,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:39,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300438187] [2024-06-27 20:18:39,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300438187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:39,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:39,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:18:39,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837859498] [2024-06-27 20:18:39,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:39,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:18:39,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:39,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:18:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:18:39,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:18:39,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 574 transitions, 7664 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:18:39,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:39,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:18:39,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:41,756 INFO L124 PetriNetUnfolderBase]: 4495/7142 cut-off events. [2024-06-27 20:18:41,756 INFO L125 PetriNetUnfolderBase]: For 1365757/1365761 co-relation queries the response was YES. [2024-06-27 20:18:41,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70285 conditions, 7142 events. 4495/7142 cut-off events. For 1365757/1365761 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 44612 event pairs, 828 based on Foata normal form. 6/7147 useless extension candidates. Maximal degree in co-relation 70096. Up to 6698 conditions per place. [2024-06-27 20:18:41,859 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 517 selfloop transitions, 82 changer transitions 0/603 dead transitions. [2024-06-27 20:18:41,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 603 transitions, 9297 flow [2024-06-27 20:18:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:18:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:18:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:18:41,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-27 20:18:41,861 INFO L175 Difference]: Start difference. First operand has 399 places, 574 transitions, 7664 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:18:41,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 603 transitions, 9297 flow [2024-06-27 20:18:48,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 603 transitions, 9030 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:48,126 INFO L231 Difference]: Finished difference. Result has 400 places, 577 transitions, 7647 flow [2024-06-27 20:18:48,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7397, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7647, PETRI_PLACES=400, PETRI_TRANSITIONS=577} [2024-06-27 20:18:48,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-27 20:18:48,127 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 577 transitions, 7647 flow [2024-06-27 20:18:48,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:18:48,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:48,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:48,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:18:48,128 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:48,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:48,128 INFO L85 PathProgramCache]: Analyzing trace with hash -395041494, now seen corresponding path program 2 times [2024-06-27 20:18:48,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:48,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454150149] [2024-06-27 20:18:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:48,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:48,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:48,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454150149] [2024-06-27 20:18:48,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454150149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:48,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:48,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:48,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174724969] [2024-06-27 20:18:48,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:48,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:48,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:48,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:48,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:48,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:18:48,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 577 transitions, 7647 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:18:48,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:48,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:18:48,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:50,823 INFO L124 PetriNetUnfolderBase]: 4505/7152 cut-off events. [2024-06-27 20:18:50,823 INFO L125 PetriNetUnfolderBase]: For 1386901/1386905 co-relation queries the response was YES. [2024-06-27 20:18:50,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70419 conditions, 7152 events. 4505/7152 cut-off events. For 1386901/1386905 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 44633 event pairs, 826 based on Foata normal form. 6/7157 useless extension candidates. Maximal degree in co-relation 70229. Up to 6708 conditions per place. [2024-06-27 20:18:50,934 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 526 selfloop transitions, 75 changer transitions 0/605 dead transitions. [2024-06-27 20:18:50,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 605 transitions, 9295 flow [2024-06-27 20:18:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:18:50,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:18:50,935 INFO L175 Difference]: Start difference. First operand has 400 places, 577 transitions, 7647 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:18:50,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 605 transitions, 9295 flow [2024-06-27 20:18:56,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 605 transitions, 9050 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:56,396 INFO L231 Difference]: Finished difference. Result has 403 places, 580 transitions, 7642 flow [2024-06-27 20:18:56,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7416, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7642, PETRI_PLACES=403, PETRI_TRANSITIONS=580} [2024-06-27 20:18:56,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-27 20:18:56,397 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 580 transitions, 7642 flow [2024-06-27 20:18:56,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:18:56,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:56,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:56,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:18:56,397 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:56,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:56,398 INFO L85 PathProgramCache]: Analyzing trace with hash 461847189, now seen corresponding path program 1 times [2024-06-27 20:18:56,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:56,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798842351] [2024-06-27 20:18:56,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:56,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:57,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:57,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798842351] [2024-06-27 20:18:57,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798842351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:57,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:57,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:57,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639236475] [2024-06-27 20:18:57,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:57,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:57,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:57,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:57,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:57,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:18:57,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 580 transitions, 7642 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:18:57,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:57,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:18:57,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:58,895 INFO L124 PetriNetUnfolderBase]: 4609/7292 cut-off events. [2024-06-27 20:18:58,895 INFO L125 PetriNetUnfolderBase]: For 1519889/1519893 co-relation queries the response was YES. [2024-06-27 20:18:58,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73220 conditions, 7292 events. 4609/7292 cut-off events. For 1519889/1519893 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 45413 event pairs, 823 based on Foata normal form. 12/7303 useless extension candidates. Maximal degree in co-relation 73029. Up to 6701 conditions per place. [2024-06-27 20:18:59,009 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 539 selfloop transitions, 78 changer transitions 0/621 dead transitions. [2024-06-27 20:18:59,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 621 transitions, 9572 flow [2024-06-27 20:18:59,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:18:59,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-27 20:18:59,011 INFO L175 Difference]: Start difference. First operand has 403 places, 580 transitions, 7642 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:18:59,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 621 transitions, 9572 flow [2024-06-27 20:19:04,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 621 transitions, 9422 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:04,352 INFO L231 Difference]: Finished difference. Result has 407 places, 593 transitions, 7972 flow [2024-06-27 20:19:04,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7492, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7972, PETRI_PLACES=407, PETRI_TRANSITIONS=593} [2024-06-27 20:19:04,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-27 20:19:04,352 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 593 transitions, 7972 flow [2024-06-27 20:19:04,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:04,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:04,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:04,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:19:04,353 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:04,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash 797575064, now seen corresponding path program 4 times [2024-06-27 20:19:04,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:04,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467111552] [2024-06-27 20:19:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:04,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:05,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:05,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467111552] [2024-06-27 20:19:05,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467111552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:05,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:05,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:05,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749913532] [2024-06-27 20:19:05,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:05,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:05,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:05,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:05,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:05,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:19:05,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 593 transitions, 7972 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:05,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:05,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:19:05,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:07,023 INFO L124 PetriNetUnfolderBase]: 4624/7315 cut-off events. [2024-06-27 20:19:07,023 INFO L125 PetriNetUnfolderBase]: For 1491407/1491409 co-relation queries the response was YES. [2024-06-27 20:19:07,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74551 conditions, 7315 events. 4624/7315 cut-off events. For 1491407/1491409 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 45618 event pairs, 833 based on Foata normal form. 1/7315 useless extension candidates. Maximal degree in co-relation 74358. Up to 6997 conditions per place. [2024-06-27 20:19:07,160 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 541 selfloop transitions, 73 changer transitions 0/618 dead transitions. [2024-06-27 20:19:07,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 618 transitions, 9407 flow [2024-06-27 20:19:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:19:07,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 20:19:07,162 INFO L175 Difference]: Start difference. First operand has 407 places, 593 transitions, 7972 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:19:07,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 618 transitions, 9407 flow [2024-06-27 20:19:13,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 618 transitions, 9210 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-27 20:19:13,084 INFO L231 Difference]: Finished difference. Result has 412 places, 602 transitions, 8101 flow [2024-06-27 20:19:13,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7775, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8101, PETRI_PLACES=412, PETRI_TRANSITIONS=602} [2024-06-27 20:19:13,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-27 20:19:13,085 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 602 transitions, 8101 flow [2024-06-27 20:19:13,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:13,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:13,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:13,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:19:13,086 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:13,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:13,086 INFO L85 PathProgramCache]: Analyzing trace with hash 797337914, now seen corresponding path program 5 times [2024-06-27 20:19:13,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:13,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679236832] [2024-06-27 20:19:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:13,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:13,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:13,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679236832] [2024-06-27 20:19:13,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679236832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:13,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:13,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:13,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566068824] [2024-06-27 20:19:13,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:13,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:13,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:13,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:13,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:14,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:19:14,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 602 transitions, 8101 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:14,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:14,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:19:14,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:15,874 INFO L124 PetriNetUnfolderBase]: 4637/7329 cut-off events. [2024-06-27 20:19:15,875 INFO L125 PetriNetUnfolderBase]: For 1524925/1524927 co-relation queries the response was YES. [2024-06-27 20:19:15,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74487 conditions, 7329 events. 4637/7329 cut-off events. For 1524925/1524927 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 45661 event pairs, 831 based on Foata normal form. 1/7329 useless extension candidates. Maximal degree in co-relation 74292. Up to 7001 conditions per place. [2024-06-27 20:19:16,005 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 540 selfloop transitions, 81 changer transitions 0/625 dead transitions. [2024-06-27 20:19:16,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 625 transitions, 9831 flow [2024-06-27 20:19:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:19:16,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-27 20:19:16,007 INFO L175 Difference]: Start difference. First operand has 412 places, 602 transitions, 8101 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:19:16,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 625 transitions, 9831 flow [2024-06-27 20:19:21,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 625 transitions, 9592 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:21,224 INFO L231 Difference]: Finished difference. Result has 415 places, 608 transitions, 8228 flow [2024-06-27 20:19:21,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7862, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8228, PETRI_PLACES=415, PETRI_TRANSITIONS=608} [2024-06-27 20:19:21,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-27 20:19:21,226 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 608 transitions, 8228 flow [2024-06-27 20:19:21,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:21,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:21,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:21,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:19:21,237 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:21,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:21,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1657956796, now seen corresponding path program 3 times [2024-06-27 20:19:21,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:21,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121028564] [2024-06-27 20:19:21,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:21,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:21,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:21,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121028564] [2024-06-27 20:19:21,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121028564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:21,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:21,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:21,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192350607] [2024-06-27 20:19:21,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:21,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:21,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:21,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:19:21,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 608 transitions, 8228 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:21,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:21,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:19:21,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:23,854 INFO L124 PetriNetUnfolderBase]: 4647/7349 cut-off events. [2024-06-27 20:19:23,854 INFO L125 PetriNetUnfolderBase]: For 1556149/1556153 co-relation queries the response was YES. [2024-06-27 20:19:23,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74829 conditions, 7349 events. 4647/7349 cut-off events. For 1556149/1556153 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 45794 event pairs, 826 based on Foata normal form. 6/7354 useless extension candidates. Maximal degree in co-relation 74633. Up to 7069 conditions per place. [2024-06-27 20:19:23,974 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 581 selfloop transitions, 47 changer transitions 0/632 dead transitions. [2024-06-27 20:19:23,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 632 transitions, 9665 flow [2024-06-27 20:19:23,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:19:23,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:19:23,975 INFO L175 Difference]: Start difference. First operand has 415 places, 608 transitions, 8228 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:19:23,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 632 transitions, 9665 flow [2024-06-27 20:19:28,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 632 transitions, 9476 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:28,677 INFO L231 Difference]: Finished difference. Result has 419 places, 611 transitions, 8222 flow [2024-06-27 20:19:28,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8039, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8222, PETRI_PLACES=419, PETRI_TRANSITIONS=611} [2024-06-27 20:19:28,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-27 20:19:28,677 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 611 transitions, 8222 flow [2024-06-27 20:19:28,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:28,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:28,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:28,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:19:28,678 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:28,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1375787257, now seen corresponding path program 2 times [2024-06-27 20:19:28,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:28,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260090336] [2024-06-27 20:19:28,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:28,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:29,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:29,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260090336] [2024-06-27 20:19:29,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260090336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:29,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:29,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:29,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441623266] [2024-06-27 20:19:29,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:29,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:29,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:29,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:29,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:19:29,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 611 transitions, 8222 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:29,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:29,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:19:29,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:31,291 INFO L124 PetriNetUnfolderBase]: 4699/7425 cut-off events. [2024-06-27 20:19:31,292 INFO L125 PetriNetUnfolderBase]: For 1634453/1634457 co-relation queries the response was YES. [2024-06-27 20:19:31,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76523 conditions, 7425 events. 4699/7425 cut-off events. For 1634453/1634457 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 46305 event pairs, 839 based on Foata normal form. 8/7432 useless extension candidates. Maximal degree in co-relation 76325. Up to 7090 conditions per place. [2024-06-27 20:19:31,420 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 584 selfloop transitions, 55 changer transitions 0/643 dead transitions. [2024-06-27 20:19:31,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 643 transitions, 10090 flow [2024-06-27 20:19:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:19:31,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 20:19:31,421 INFO L175 Difference]: Start difference. First operand has 419 places, 611 transitions, 8222 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:19:31,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 643 transitions, 10090 flow [2024-06-27 20:19:37,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 643 transitions, 9956 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:37,458 INFO L231 Difference]: Finished difference. Result has 421 places, 619 transitions, 8424 flow [2024-06-27 20:19:37,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8088, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8424, PETRI_PLACES=421, PETRI_TRANSITIONS=619} [2024-06-27 20:19:37,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-27 20:19:37,458 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 619 transitions, 8424 flow [2024-06-27 20:19:37,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:37,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:37,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:37,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:19:37,459 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:37,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:37,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1665188290, now seen corresponding path program 6 times [2024-06-27 20:19:37,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:37,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616841295] [2024-06-27 20:19:37,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:37,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:38,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:38,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616841295] [2024-06-27 20:19:38,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616841295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:38,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:38,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:38,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482002444] [2024-06-27 20:19:38,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:38,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:38,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:38,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:38,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:38,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:19:38,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 619 transitions, 8424 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:38,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:38,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:19:38,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:40,279 INFO L124 PetriNetUnfolderBase]: 4696/7409 cut-off events. [2024-06-27 20:19:40,280 INFO L125 PetriNetUnfolderBase]: For 1626583/1626585 co-relation queries the response was YES. [2024-06-27 20:19:40,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76615 conditions, 7409 events. 4696/7409 cut-off events. For 1626583/1626585 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 46113 event pairs, 850 based on Foata normal form. 1/7409 useless extension candidates. Maximal degree in co-relation 76416. Up to 7097 conditions per place. [2024-06-27 20:19:40,395 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 557 selfloop transitions, 74 changer transitions 0/635 dead transitions. [2024-06-27 20:19:40,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 635 transitions, 9726 flow [2024-06-27 20:19:40,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:19:40,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-27 20:19:40,396 INFO L175 Difference]: Start difference. First operand has 421 places, 619 transitions, 8424 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:19:40,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 635 transitions, 9726 flow [2024-06-27 20:19:47,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 635 transitions, 9521 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-27 20:19:47,324 INFO L231 Difference]: Finished difference. Result has 426 places, 619 transitions, 8374 flow [2024-06-27 20:19:47,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8219, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8374, PETRI_PLACES=426, PETRI_TRANSITIONS=619} [2024-06-27 20:19:47,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-27 20:19:47,325 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 619 transitions, 8374 flow [2024-06-27 20:19:47,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:47,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:47,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:47,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:19:47,326 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:47,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:47,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1665308663, now seen corresponding path program 3 times [2024-06-27 20:19:47,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:47,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530531704] [2024-06-27 20:19:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:47,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:47,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:47,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530531704] [2024-06-27 20:19:47,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530531704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:47,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:47,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:47,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361954236] [2024-06-27 20:19:47,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:47,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:47,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:47,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:47,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:48,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:19:48,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 619 transitions, 8374 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:48,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:48,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:19:48,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:50,029 INFO L124 PetriNetUnfolderBase]: 4716/7451 cut-off events. [2024-06-27 20:19:50,029 INFO L125 PetriNetUnfolderBase]: For 1670598/1670602 co-relation queries the response was YES. [2024-06-27 20:19:50,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76862 conditions, 7451 events. 4716/7451 cut-off events. For 1670598/1670602 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 46499 event pairs, 839 based on Foata normal form. 8/7458 useless extension candidates. Maximal degree in co-relation 76661. Up to 7134 conditions per place. [2024-06-27 20:19:50,159 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 591 selfloop transitions, 49 changer transitions 0/644 dead transitions. [2024-06-27 20:19:50,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 644 transitions, 10095 flow [2024-06-27 20:19:50,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:19:50,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 20:19:50,161 INFO L175 Difference]: Start difference. First operand has 426 places, 619 transitions, 8374 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:19:50,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 644 transitions, 10095 flow [2024-06-27 20:19:57,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 644 transitions, 9894 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 20:19:57,814 INFO L231 Difference]: Finished difference. Result has 426 places, 622 transitions, 8363 flow [2024-06-27 20:19:57,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8173, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8363, PETRI_PLACES=426, PETRI_TRANSITIONS=622} [2024-06-27 20:19:57,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-27 20:19:57,815 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 622 transitions, 8363 flow [2024-06-27 20:19:57,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:57,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:57,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:57,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:19:57,815 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:57,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:57,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1665308446, now seen corresponding path program 4 times [2024-06-27 20:19:57,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:57,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665273046] [2024-06-27 20:19:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:57,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:58,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:58,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665273046] [2024-06-27 20:19:58,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665273046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:58,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:58,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:19:58,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237679323] [2024-06-27 20:19:58,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:58,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:19:58,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:19:58,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:19:58,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:19:58,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 622 transitions, 8363 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:19:58,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:58,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:19:58,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:00,497 INFO L124 PetriNetUnfolderBase]: 4726/7465 cut-off events. [2024-06-27 20:20:00,497 INFO L125 PetriNetUnfolderBase]: For 1677221/1677225 co-relation queries the response was YES. [2024-06-27 20:20:00,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77159 conditions, 7465 events. 4726/7465 cut-off events. For 1677221/1677225 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 46574 event pairs, 842 based on Foata normal form. 6/7470 useless extension candidates. Maximal degree in co-relation 76957. Up to 7195 conditions per place. [2024-06-27 20:20:00,626 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 600 selfloop transitions, 40 changer transitions 0/644 dead transitions. [2024-06-27 20:20:00,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 644 transitions, 9805 flow [2024-06-27 20:20:00,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:20:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:20:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:20:00,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 20:20:00,628 INFO L175 Difference]: Start difference. First operand has 426 places, 622 transitions, 8363 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:20:00,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 644 transitions, 9805 flow [2024-06-27 20:20:07,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 644 transitions, 9618 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:07,525 INFO L231 Difference]: Finished difference. Result has 428 places, 625 transitions, 8351 flow [2024-06-27 20:20:07,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8176, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8351, PETRI_PLACES=428, PETRI_TRANSITIONS=625} [2024-06-27 20:20:07,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-27 20:20:07,525 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 625 transitions, 8351 flow [2024-06-27 20:20:07,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:20:07,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:07,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:07,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:20:07,526 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:07,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:07,526 INFO L85 PathProgramCache]: Analyzing trace with hash 905787265, now seen corresponding path program 4 times [2024-06-27 20:20:07,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:07,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565151710] [2024-06-27 20:20:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:07,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:08,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:08,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565151710] [2024-06-27 20:20:08,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565151710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:08,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:08,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:20:08,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466232873] [2024-06-27 20:20:08,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:08,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:20:08,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:08,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:20:08,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:20:08,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:20:08,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 625 transitions, 8351 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:20:08,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:08,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:20:08,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:10,184 INFO L124 PetriNetUnfolderBase]: 4714/7449 cut-off events. [2024-06-27 20:20:10,184 INFO L125 PetriNetUnfolderBase]: For 1674632/1674636 co-relation queries the response was YES. [2024-06-27 20:20:10,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76365 conditions, 7449 events. 4714/7449 cut-off events. For 1674632/1674636 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 46460 event pairs, 843 based on Foata normal form. 8/7456 useless extension candidates. Maximal degree in co-relation 76162. Up to 7164 conditions per place. [2024-06-27 20:20:10,317 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 595 selfloop transitions, 45 changer transitions 0/644 dead transitions. [2024-06-27 20:20:10,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 644 transitions, 9700 flow [2024-06-27 20:20:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:20:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:20:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:20:10,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 20:20:10,319 INFO L175 Difference]: Start difference. First operand has 428 places, 625 transitions, 8351 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:20:10,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 644 transitions, 9700 flow [2024-06-27 20:20:17,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 644 transitions, 9520 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:17,440 INFO L231 Difference]: Finished difference. Result has 430 places, 625 transitions, 8267 flow [2024-06-27 20:20:17,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8171, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8267, PETRI_PLACES=430, PETRI_TRANSITIONS=625} [2024-06-27 20:20:17,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-27 20:20:17,440 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 625 transitions, 8267 flow [2024-06-27 20:20:17,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:20:17,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:17,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:17,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:20:17,441 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:17,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:17,442 INFO L85 PathProgramCache]: Analyzing trace with hash 905397006, now seen corresponding path program 4 times [2024-06-27 20:20:17,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:17,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411197504] [2024-06-27 20:20:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:17,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:18,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:18,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411197504] [2024-06-27 20:20:18,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411197504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:18,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:18,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:20:18,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871241377] [2024-06-27 20:20:18,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:18,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:20:18,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:18,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:20:18,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:20:18,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:20:18,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 625 transitions, 8267 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:20:18,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:18,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:20:18,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:21,113 INFO L124 PetriNetUnfolderBase]: 4722/7457 cut-off events. [2024-06-27 20:20:21,114 INFO L125 PetriNetUnfolderBase]: For 1677884/1677886 co-relation queries the response was YES. [2024-06-27 20:20:21,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76384 conditions, 7457 events. 4722/7457 cut-off events. For 1677884/1677886 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 46501 event pairs, 850 based on Foata normal form. 2/7458 useless extension candidates. Maximal degree in co-relation 76180. Up to 7132 conditions per place. [2024-06-27 20:20:21,228 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 567 selfloop transitions, 73 changer transitions 0/644 dead transitions. [2024-06-27 20:20:21,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 644 transitions, 9613 flow [2024-06-27 20:20:21,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:20:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:20:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:20:21,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-27 20:20:21,229 INFO L175 Difference]: Start difference. First operand has 430 places, 625 transitions, 8267 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:20:21,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 644 transitions, 9613 flow [2024-06-27 20:20:28,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 644 transitions, 9507 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:28,251 INFO L231 Difference]: Finished difference. Result has 431 places, 627 transitions, 8341 flow [2024-06-27 20:20:28,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8161, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8341, PETRI_PLACES=431, PETRI_TRANSITIONS=627} [2024-06-27 20:20:28,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-27 20:20:28,251 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 627 transitions, 8341 flow [2024-06-27 20:20:28,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:20:28,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:28,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:28,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:20:28,252 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:28,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:28,252 INFO L85 PathProgramCache]: Analyzing trace with hash 797572088, now seen corresponding path program 5 times [2024-06-27 20:20:28,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:28,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23421232] [2024-06-27 20:20:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:28,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:29,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:29,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23421232] [2024-06-27 20:20:29,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23421232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:29,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:29,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:20:29,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201237121] [2024-06-27 20:20:29,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:29,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:20:29,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:29,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:20:29,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:20:29,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:20:29,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 627 transitions, 8341 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:20:29,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:29,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:20:29,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:31,732 INFO L124 PetriNetUnfolderBase]: 4730/7473 cut-off events. [2024-06-27 20:20:31,733 INFO L125 PetriNetUnfolderBase]: For 1700255/1700257 co-relation queries the response was YES. [2024-06-27 20:20:31,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76675 conditions, 7473 events. 4730/7473 cut-off events. For 1700255/1700257 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 46653 event pairs, 850 based on Foata normal form. 2/7474 useless extension candidates. Maximal degree in co-relation 76470. Up to 7144 conditions per place. [2024-06-27 20:20:31,845 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 570 selfloop transitions, 72 changer transitions 0/646 dead transitions. [2024-06-27 20:20:31,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 646 transitions, 9695 flow [2024-06-27 20:20:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:20:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:20:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:20:31,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 20:20:31,847 INFO L175 Difference]: Start difference. First operand has 431 places, 627 transitions, 8341 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:20:31,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 646 transitions, 9695 flow [2024-06-27 20:20:42,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 646 transitions, 9537 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:42,531 INFO L231 Difference]: Finished difference. Result has 433 places, 629 transitions, 8365 flow [2024-06-27 20:20:42,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8183, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8365, PETRI_PLACES=433, PETRI_TRANSITIONS=629} [2024-06-27 20:20:42,532 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-27 20:20:42,532 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 629 transitions, 8365 flow [2024-06-27 20:20:42,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:20:42,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:42,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:42,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:20:42,532 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:42,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash 797245658, now seen corresponding path program 6 times [2024-06-27 20:20:42,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:42,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260642997] [2024-06-27 20:20:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:42,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:43,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:43,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260642997] [2024-06-27 20:20:43,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260642997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:43,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:43,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:20:43,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337664256] [2024-06-27 20:20:43,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:43,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:20:43,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:43,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:20:43,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:20:43,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:20:43,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 629 transitions, 8365 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:20:43,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:43,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:20:43,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:46,056 INFO L124 PetriNetUnfolderBase]: 4738/7485 cut-off events. [2024-06-27 20:20:46,056 INFO L125 PetriNetUnfolderBase]: For 1723612/1723614 co-relation queries the response was YES. [2024-06-27 20:20:46,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76916 conditions, 7485 events. 4738/7485 cut-off events. For 1723612/1723614 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 46671 event pairs, 846 based on Foata normal form. 2/7486 useless extension candidates. Maximal degree in co-relation 76710. Up to 7132 conditions per place. [2024-06-27 20:20:46,180 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 568 selfloop transitions, 77 changer transitions 0/649 dead transitions. [2024-06-27 20:20:46,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 649 transitions, 9731 flow [2024-06-27 20:20:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:20:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:20:46,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:20:46,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:20:46,181 INFO L175 Difference]: Start difference. First operand has 433 places, 629 transitions, 8365 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:20:46,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 649 transitions, 9731 flow [2024-06-27 20:20:56,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 649 transitions, 9571 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:56,311 INFO L231 Difference]: Finished difference. Result has 435 places, 631 transitions, 8400 flow [2024-06-27 20:20:56,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8205, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8400, PETRI_PLACES=435, PETRI_TRANSITIONS=631} [2024-06-27 20:20:56,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-27 20:20:56,312 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 631 transitions, 8400 flow [2024-06-27 20:20:56,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:20:56,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:56,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:56,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:20:56,313 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:56,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:56,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1665585493, now seen corresponding path program 1 times [2024-06-27 20:20:56,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:56,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440122974] [2024-06-27 20:20:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:56,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:57,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:57,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440122974] [2024-06-27 20:20:57,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440122974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:57,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:57,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:20:57,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680409248] [2024-06-27 20:20:57,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:57,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:20:57,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:57,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:20:57,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:20:57,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:20:57,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 631 transitions, 8400 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:57,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:57,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:20:57,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:59,713 INFO L124 PetriNetUnfolderBase]: 4782/7557 cut-off events. [2024-06-27 20:20:59,713 INFO L125 PetriNetUnfolderBase]: For 1841636/1841638 co-relation queries the response was YES. [2024-06-27 20:20:59,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77581 conditions, 7557 events. 4782/7557 cut-off events. For 1841636/1841638 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 47273 event pairs, 860 based on Foata normal form. 12/7568 useless extension candidates. Maximal degree in co-relation 77374. Up to 7098 conditions per place. [2024-06-27 20:20:59,837 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 568 selfloop transitions, 86 changer transitions 0/658 dead transitions. [2024-06-27 20:20:59,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 658 transitions, 9890 flow [2024-06-27 20:20:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:20:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:20:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:20:59,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:20:59,838 INFO L175 Difference]: Start difference. First operand has 435 places, 631 transitions, 8400 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:20:59,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 658 transitions, 9890 flow [2024-06-27 20:21:10,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 658 transitions, 9715 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:10,173 INFO L231 Difference]: Finished difference. Result has 437 places, 632 transitions, 8424 flow [2024-06-27 20:21:10,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8225, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8424, PETRI_PLACES=437, PETRI_TRANSITIONS=632} [2024-06-27 20:21:10,174 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-27 20:21:10,174 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 632 transitions, 8424 flow [2024-06-27 20:21:10,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:10,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:10,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:10,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:21:10,175 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:10,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:10,175 INFO L85 PathProgramCache]: Analyzing trace with hash 427421161, now seen corresponding path program 2 times [2024-06-27 20:21:10,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:10,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382058310] [2024-06-27 20:21:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:10,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:10,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:10,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382058310] [2024-06-27 20:21:10,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382058310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:10,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:10,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:10,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653356527] [2024-06-27 20:21:10,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:10,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:10,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:10,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:10,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:21:10,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 632 transitions, 8424 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:21:10,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:10,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:21:10,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:13,325 INFO L124 PetriNetUnfolderBase]: 4795/7572 cut-off events. [2024-06-27 20:21:13,325 INFO L125 PetriNetUnfolderBase]: For 1776794/1776802 co-relation queries the response was YES. [2024-06-27 20:21:13,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78311 conditions, 7572 events. 4795/7572 cut-off events. For 1776794/1776802 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 47378 event pairs, 866 based on Foata normal form. 9/7580 useless extension candidates. Maximal degree in co-relation 78103. Up to 7115 conditions per place. [2024-06-27 20:21:13,457 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 586 selfloop transitions, 75 changer transitions 0/665 dead transitions. [2024-06-27 20:21:13,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 665 transitions, 10755 flow [2024-06-27 20:21:13,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:21:13,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:21:13,459 INFO L175 Difference]: Start difference. First operand has 437 places, 632 transitions, 8424 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:21:13,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 665 transitions, 10755 flow [2024-06-27 20:21:21,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 665 transitions, 10578 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:21,763 INFO L231 Difference]: Finished difference. Result has 439 places, 643 transitions, 8840 flow [2024-06-27 20:21:21,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8247, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8840, PETRI_PLACES=439, PETRI_TRANSITIONS=643} [2024-06-27 20:21:21,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-27 20:21:21,764 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 643 transitions, 8840 flow [2024-06-27 20:21:21,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:21:21,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:21,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:21,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:21:21,764 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:21,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1049345731, now seen corresponding path program 3 times [2024-06-27 20:21:21,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:21,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949021457] [2024-06-27 20:21:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:21,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:22,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:22,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949021457] [2024-06-27 20:21:22,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949021457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:22,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:22,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:22,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968059806] [2024-06-27 20:21:22,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:22,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:22,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:22,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:22,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:22,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:21:22,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 643 transitions, 8840 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:21:22,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:22,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:21:22,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:25,013 INFO L124 PetriNetUnfolderBase]: 4810/7603 cut-off events. [2024-06-27 20:21:25,013 INFO L125 PetriNetUnfolderBase]: For 1830056/1830064 co-relation queries the response was YES. [2024-06-27 20:21:25,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79547 conditions, 7603 events. 4810/7603 cut-off events. For 1830056/1830064 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 47665 event pairs, 858 based on Foata normal form. 11/7613 useless extension candidates. Maximal degree in co-relation 79337. Up to 6929 conditions per place. [2024-06-27 20:21:25,267 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 514 selfloop transitions, 157 changer transitions 0/675 dead transitions. [2024-06-27 20:21:25,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 675 transitions, 10997 flow [2024-06-27 20:21:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:25,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 20:21:25,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 20:21:25,269 INFO L175 Difference]: Start difference. First operand has 439 places, 643 transitions, 8840 flow. Second operand 10 states and 175 transitions. [2024-06-27 20:21:25,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 675 transitions, 10997 flow [2024-06-27 20:21:35,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 675 transitions, 10672 flow, removed 135 selfloop flow, removed 3 redundant places. [2024-06-27 20:21:35,139 INFO L231 Difference]: Finished difference. Result has 446 places, 652 transitions, 9303 flow [2024-06-27 20:21:35,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8536, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9303, PETRI_PLACES=446, PETRI_TRANSITIONS=652} [2024-06-27 20:21:35,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-27 20:21:35,140 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 652 transitions, 9303 flow [2024-06-27 20:21:35,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:21:35,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:35,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:35,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:21:35,141 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:35,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:35,141 INFO L85 PathProgramCache]: Analyzing trace with hash 781417381, now seen corresponding path program 4 times [2024-06-27 20:21:35,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:35,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916493129] [2024-06-27 20:21:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:35,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:35,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:35,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916493129] [2024-06-27 20:21:35,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916493129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:35,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:35,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:35,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004276356] [2024-06-27 20:21:35,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:35,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:35,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:35,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:35,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:35,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:21:35,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 652 transitions, 9303 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:21:35,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:35,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:21:35,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:38,356 INFO L124 PetriNetUnfolderBase]: 4804/7593 cut-off events. [2024-06-27 20:21:38,356 INFO L125 PetriNetUnfolderBase]: For 1830003/1830011 co-relation queries the response was YES. [2024-06-27 20:21:38,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80182 conditions, 7593 events. 4804/7593 cut-off events. For 1830003/1830011 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 47575 event pairs, 856 based on Foata normal form. 10/7602 useless extension candidates. Maximal degree in co-relation 79970. Up to 7006 conditions per place. [2024-06-27 20:21:38,480 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 556 selfloop transitions, 114 changer transitions 0/674 dead transitions. [2024-06-27 20:21:38,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 674 transitions, 10710 flow [2024-06-27 20:21:38,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:21:38,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:21:38,481 INFO L175 Difference]: Start difference. First operand has 446 places, 652 transitions, 9303 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:21:38,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 674 transitions, 10710 flow [2024-06-27 20:21:48,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 674 transitions, 10051 flow, removed 245 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:48,744 INFO L231 Difference]: Finished difference. Result has 449 places, 652 transitions, 8887 flow [2024-06-27 20:21:48,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8644, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8887, PETRI_PLACES=449, PETRI_TRANSITIONS=652} [2024-06-27 20:21:48,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-27 20:21:48,745 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 652 transitions, 8887 flow [2024-06-27 20:21:48,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:21:48,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:48,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:48,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:21:48,746 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:48,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:48,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1984735958, now seen corresponding path program 5 times [2024-06-27 20:21:48,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:48,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935371664] [2024-06-27 20:21:48,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:48,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:49,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:49,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935371664] [2024-06-27 20:21:49,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935371664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:49,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:49,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:21:49,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369301643] [2024-06-27 20:21:49,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:49,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:21:49,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:49,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:21:49,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:21:49,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:21:49,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 652 transitions, 8887 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:21:49,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:49,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:21:49,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:51,935 INFO L124 PetriNetUnfolderBase]: 4814/7603 cut-off events. [2024-06-27 20:21:51,936 INFO L125 PetriNetUnfolderBase]: For 1848137/1848145 co-relation queries the response was YES. [2024-06-27 20:21:52,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80258 conditions, 7603 events. 4814/7603 cut-off events. For 1848137/1848145 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 47628 event pairs, 852 based on Foata normal form. 10/7612 useless extension candidates. Maximal degree in co-relation 80044. Up to 6841 conditions per place. [2024-06-27 20:21:52,106 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 538 selfloop transitions, 138 changer transitions 0/680 dead transitions. [2024-06-27 20:21:52,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 680 transitions, 10997 flow [2024-06-27 20:21:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:21:52,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 20:21:52,107 INFO L175 Difference]: Start difference. First operand has 449 places, 652 transitions, 8887 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:21:52,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 680 transitions, 10997 flow [2024-06-27 20:22:02,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 680 transitions, 10754 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:02,900 INFO L231 Difference]: Finished difference. Result has 451 places, 655 transitions, 8985 flow [2024-06-27 20:22:02,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8644, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8985, PETRI_PLACES=451, PETRI_TRANSITIONS=655} [2024-06-27 20:22:02,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-27 20:22:02,901 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 655 transitions, 8985 flow [2024-06-27 20:22:02,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:22:02,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:02,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:02,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:22:02,901 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:02,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:02,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1623084301, now seen corresponding path program 5 times [2024-06-27 20:22:02,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:02,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965308669] [2024-06-27 20:22:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:02,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:03,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:03,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965308669] [2024-06-27 20:22:03,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965308669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:03,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:03,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:03,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856070596] [2024-06-27 20:22:03,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:03,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:03,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:03,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:03,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:03,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:22:03,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 655 transitions, 8985 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:22:03,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:03,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:22:03,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:06,043 INFO L124 PetriNetUnfolderBase]: 4902/7731 cut-off events. [2024-06-27 20:22:06,043 INFO L125 PetriNetUnfolderBase]: For 2005461/2005469 co-relation queries the response was YES. [2024-06-27 20:22:06,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83085 conditions, 7731 events. 4902/7731 cut-off events. For 2005461/2005469 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 48420 event pairs, 868 based on Foata normal form. 16/7746 useless extension candidates. Maximal degree in co-relation 82870. Up to 6508 conditions per place. [2024-06-27 20:22:06,176 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 527 selfloop transitions, 161 changer transitions 0/692 dead transitions. [2024-06-27 20:22:06,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 692 transitions, 11454 flow [2024-06-27 20:22:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:22:06,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 20:22:06,177 INFO L175 Difference]: Start difference. First operand has 451 places, 655 transitions, 8985 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:22:06,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 692 transitions, 11454 flow [2024-06-27 20:22:17,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 692 transitions, 11136 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:17,239 INFO L231 Difference]: Finished difference. Result has 453 places, 662 transitions, 9248 flow [2024-06-27 20:22:17,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8667, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9248, PETRI_PLACES=453, PETRI_TRANSITIONS=662} [2024-06-27 20:22:17,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-27 20:22:17,239 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 662 transitions, 9248 flow [2024-06-27 20:22:17,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:22:17,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:17,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:17,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:22:17,240 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:17,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1984741538, now seen corresponding path program 6 times [2024-06-27 20:22:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:17,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996631506] [2024-06-27 20:22:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:17,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:17,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996631506] [2024-06-27 20:22:17,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996631506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:17,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:17,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:17,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64002512] [2024-06-27 20:22:17,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:17,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:17,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:17,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:17,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:17,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:22:17,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 662 transitions, 9248 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:22:17,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:17,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:22:17,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:20,325 INFO L124 PetriNetUnfolderBase]: 4928/7753 cut-off events. [2024-06-27 20:22:20,325 INFO L125 PetriNetUnfolderBase]: For 2001706/2001714 co-relation queries the response was YES. [2024-06-27 20:22:20,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84469 conditions, 7753 events. 4928/7753 cut-off events. For 2001706/2001714 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 48381 event pairs, 858 based on Foata normal form. 10/7762 useless extension candidates. Maximal degree in co-relation 84253. Up to 6988 conditions per place. [2024-06-27 20:22:20,456 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 539 selfloop transitions, 152 changer transitions 0/695 dead transitions. [2024-06-27 20:22:20,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 695 transitions, 11747 flow [2024-06-27 20:22:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:22:20,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-27 20:22:20,458 INFO L175 Difference]: Start difference. First operand has 453 places, 662 transitions, 9248 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:22:20,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 695 transitions, 11747 flow [2024-06-27 20:22:31,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 695 transitions, 11352 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:31,328 INFO L231 Difference]: Finished difference. Result has 455 places, 668 transitions, 9291 flow [2024-06-27 20:22:31,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8853, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9291, PETRI_PLACES=455, PETRI_TRANSITIONS=668} [2024-06-27 20:22:31,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-27 20:22:31,328 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 668 transitions, 9291 flow [2024-06-27 20:22:31,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:22:31,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:31,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:31,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:22:31,329 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:31,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:31,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1669053038, now seen corresponding path program 7 times [2024-06-27 20:22:31,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:31,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412141173] [2024-06-27 20:22:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:31,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:31,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:31,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412141173] [2024-06-27 20:22:31,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412141173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:31,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:31,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:31,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296954010] [2024-06-27 20:22:31,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:31,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:31,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:31,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:31,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:32,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:22:32,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 668 transitions, 9291 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:22:32,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:32,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:22:32,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:34,386 INFO L124 PetriNetUnfolderBase]: 4938/7769 cut-off events. [2024-06-27 20:22:34,386 INFO L125 PetriNetUnfolderBase]: For 2012085/2012093 co-relation queries the response was YES. [2024-06-27 20:22:34,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83803 conditions, 7769 events. 4938/7769 cut-off events. For 2012085/2012093 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 48520 event pairs, 868 based on Foata normal form. 10/7778 useless extension candidates. Maximal degree in co-relation 83586. Up to 6998 conditions per place. [2024-06-27 20:22:34,521 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 519 selfloop transitions, 174 changer transitions 0/697 dead transitions. [2024-06-27 20:22:34,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 697 transitions, 11453 flow [2024-06-27 20:22:34,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:34,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:22:34,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:22:34,522 INFO L175 Difference]: Start difference. First operand has 455 places, 668 transitions, 9291 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:22:34,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 697 transitions, 11453 flow [2024-06-27 20:22:46,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 697 transitions, 11194 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:46,082 INFO L231 Difference]: Finished difference. Result has 459 places, 671 transitions, 9456 flow [2024-06-27 20:22:46,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9035, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9456, PETRI_PLACES=459, PETRI_TRANSITIONS=671} [2024-06-27 20:22:46,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-27 20:22:46,083 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 671 transitions, 9456 flow [2024-06-27 20:22:46,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:22:46,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:46,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:46,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:22:46,083 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:46,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash 407483907, now seen corresponding path program 6 times [2024-06-27 20:22:46,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:46,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392628125] [2024-06-27 20:22:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:46,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:46,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392628125] [2024-06-27 20:22:46,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392628125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:46,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:46,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:46,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866661908] [2024-06-27 20:22:46,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:46,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:46,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:46,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:46,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:46,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:22:46,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 671 transitions, 9456 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:22:46,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:46,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:22:46,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:49,601 INFO L124 PetriNetUnfolderBase]: 5042/7923 cut-off events. [2024-06-27 20:22:49,602 INFO L125 PetriNetUnfolderBase]: For 2196325/2196333 co-relation queries the response was YES. [2024-06-27 20:22:49,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86886 conditions, 7923 events. 5042/7923 cut-off events. For 2196325/2196333 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 49571 event pairs, 885 based on Foata normal form. 16/7938 useless extension candidates. Maximal degree in co-relation 86668. Up to 6589 conditions per place. [2024-06-27 20:22:49,748 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 528 selfloop transitions, 177 changer transitions 0/709 dead transitions. [2024-06-27 20:22:49,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 709 transitions, 11949 flow [2024-06-27 20:22:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:49,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:49,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:22:49,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 20:22:49,749 INFO L175 Difference]: Start difference. First operand has 459 places, 671 transitions, 9456 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:22:49,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 709 transitions, 11949 flow [2024-06-27 20:23:00,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 709 transitions, 11487 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:00,325 INFO L231 Difference]: Finished difference. Result has 463 places, 679 transitions, 9624 flow [2024-06-27 20:23:00,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8994, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9624, PETRI_PLACES=463, PETRI_TRANSITIONS=679} [2024-06-27 20:23:00,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-27 20:23:00,326 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 679 transitions, 9624 flow [2024-06-27 20:23:00,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:23:00,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:00,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:00,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:23:00,326 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:00,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:00,327 INFO L85 PathProgramCache]: Analyzing trace with hash 407483690, now seen corresponding path program 8 times [2024-06-27 20:23:00,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:00,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212196506] [2024-06-27 20:23:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:00,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:01,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:01,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212196506] [2024-06-27 20:23:01,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212196506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:01,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:01,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:23:01,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450236428] [2024-06-27 20:23:01,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:01,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:23:01,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:01,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:23:01,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:23:01,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:23:01,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 679 transitions, 9624 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:23:01,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:01,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:23:01,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:03,641 INFO L124 PetriNetUnfolderBase]: 5052/7963 cut-off events. [2024-06-27 20:23:03,641 INFO L125 PetriNetUnfolderBase]: For 2162016/2162024 co-relation queries the response was YES. [2024-06-27 20:23:03,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87561 conditions, 7963 events. 5052/7963 cut-off events. For 2162016/2162024 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 50099 event pairs, 894 based on Foata normal form. 10/7972 useless extension candidates. Maximal degree in co-relation 87341. Up to 7152 conditions per place. [2024-06-27 20:23:03,911 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 545 selfloop transitions, 157 changer transitions 0/706 dead transitions. [2024-06-27 20:23:03,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 706 transitions, 11549 flow [2024-06-27 20:23:03,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:23:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:23:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:23:03,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 20:23:03,913 INFO L175 Difference]: Start difference. First operand has 463 places, 679 transitions, 9624 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:23:03,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 706 transitions, 11549 flow [2024-06-27 20:23:14,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 706 transitions, 11209 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-27 20:23:14,322 INFO L231 Difference]: Finished difference. Result has 467 places, 682 transitions, 9670 flow [2024-06-27 20:23:14,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9286, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9670, PETRI_PLACES=467, PETRI_TRANSITIONS=682} [2024-06-27 20:23:14,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-27 20:23:14,323 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 682 transitions, 9670 flow [2024-06-27 20:23:14,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:23:14,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:14,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:14,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:23:14,324 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:14,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:14,324 INFO L85 PathProgramCache]: Analyzing trace with hash -266776554, now seen corresponding path program 9 times [2024-06-27 20:23:14,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:14,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944603289] [2024-06-27 20:23:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:14,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:14,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:14,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944603289] [2024-06-27 20:23:14,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944603289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:14,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:14,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:23:14,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29931554] [2024-06-27 20:23:14,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:14,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:23:14,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:14,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:23:14,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:23:15,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:23:15,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 682 transitions, 9670 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:23:15,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:15,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:23:15,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:17,705 INFO L124 PetriNetUnfolderBase]: 5078/7979 cut-off events. [2024-06-27 20:23:17,705 INFO L125 PetriNetUnfolderBase]: For 2205842/2205850 co-relation queries the response was YES. [2024-06-27 20:23:17,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87747 conditions, 7979 events. 5078/7979 cut-off events. For 2205842/2205850 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 49993 event pairs, 887 based on Foata normal form. 10/7988 useless extension candidates. Maximal degree in co-relation 87526. Up to 7177 conditions per place. [2024-06-27 20:23:17,845 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 543 selfloop transitions, 169 changer transitions 0/716 dead transitions. [2024-06-27 20:23:17,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 716 transitions, 12006 flow [2024-06-27 20:23:17,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:23:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:23:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-27 20:23:17,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190687361419069 [2024-06-27 20:23:17,846 INFO L175 Difference]: Start difference. First operand has 467 places, 682 transitions, 9670 flow. Second operand 11 states and 189 transitions. [2024-06-27 20:23:17,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 716 transitions, 12006 flow [2024-06-27 20:23:28,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 716 transitions, 11760 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:28,821 INFO L231 Difference]: Finished difference. Result has 472 places, 689 transitions, 9915 flow [2024-06-27 20:23:28,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9431, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9915, PETRI_PLACES=472, PETRI_TRANSITIONS=689} [2024-06-27 20:23:28,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-27 20:23:28,822 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 689 transitions, 9915 flow [2024-06-27 20:23:28,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:23:28,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:28,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:28,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:23:28,822 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:28,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:28,823 INFO L85 PathProgramCache]: Analyzing trace with hash -266776337, now seen corresponding path program 7 times [2024-06-27 20:23:28,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:28,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742215132] [2024-06-27 20:23:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:28,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:29,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:29,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742215132] [2024-06-27 20:23:29,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742215132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:29,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:29,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:23:29,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671678336] [2024-06-27 20:23:29,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:29,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:23:29,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:29,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:23:29,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:23:29,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:23:29,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 689 transitions, 9915 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:23:29,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:29,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:23:29,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:32,115 INFO L124 PetriNetUnfolderBase]: 5118/8043 cut-off events. [2024-06-27 20:23:32,115 INFO L125 PetriNetUnfolderBase]: For 2303094/2303102 co-relation queries the response was YES. [2024-06-27 20:23:32,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88592 conditions, 8043 events. 5118/8043 cut-off events. For 2303094/2303102 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 50439 event pairs, 876 based on Foata normal form. 16/8058 useless extension candidates. Maximal degree in co-relation 88370. Up to 6634 conditions per place. [2024-06-27 20:23:32,252 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 526 selfloop transitions, 191 changer transitions 0/721 dead transitions. [2024-06-27 20:23:32,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 721 transitions, 12283 flow [2024-06-27 20:23:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:23:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:23:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:23:32,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-27 20:23:32,254 INFO L175 Difference]: Start difference. First operand has 472 places, 689 transitions, 9915 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:23:32,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 721 transitions, 12283 flow [2024-06-27 20:23:42,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 721 transitions, 12021 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:42,536 INFO L231 Difference]: Finished difference. Result has 475 places, 693 transitions, 10153 flow [2024-06-27 20:23:42,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9653, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10153, PETRI_PLACES=475, PETRI_TRANSITIONS=693} [2024-06-27 20:23:42,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-27 20:23:42,537 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 693 transitions, 10153 flow [2024-06-27 20:23:42,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:23:42,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:42,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:42,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:23:42,538 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:42,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:42,538 INFO L85 PathProgramCache]: Analyzing trace with hash -279455244, now seen corresponding path program 10 times [2024-06-27 20:23:42,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:42,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703804808] [2024-06-27 20:23:42,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:42,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:43,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:43,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703804808] [2024-06-27 20:23:43,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703804808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:43,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:43,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:43,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027001306] [2024-06-27 20:23:43,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:43,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:43,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:43,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:43,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:43,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:23:43,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 693 transitions, 10153 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:23:43,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:43,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:23:43,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:45,835 INFO L124 PetriNetUnfolderBase]: 5128/8049 cut-off events. [2024-06-27 20:23:45,836 INFO L125 PetriNetUnfolderBase]: For 2270444/2270452 co-relation queries the response was YES. [2024-06-27 20:23:45,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89129 conditions, 8049 events. 5128/8049 cut-off events. For 2270444/2270452 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 50381 event pairs, 876 based on Foata normal form. 10/8058 useless extension candidates. Maximal degree in co-relation 88906. Up to 7243 conditions per place. [2024-06-27 20:23:45,980 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 524 selfloop transitions, 191 changer transitions 0/719 dead transitions. [2024-06-27 20:23:45,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 719 transitions, 12083 flow [2024-06-27 20:23:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:23:45,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:23:45,981 INFO L175 Difference]: Start difference. First operand has 475 places, 693 transitions, 10153 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:23:45,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 719 transitions, 12083 flow [2024-06-27 20:23:58,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 719 transitions, 11595 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 20:23:58,333 INFO L231 Difference]: Finished difference. Result has 476 places, 697 transitions, 10134 flow [2024-06-27 20:23:58,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9669, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10134, PETRI_PLACES=476, PETRI_TRANSITIONS=697} [2024-06-27 20:23:58,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-27 20:23:58,334 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 697 transitions, 10134 flow [2024-06-27 20:23:58,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-27 20:23:58,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:58,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:58,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:23:58,334 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:58,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:58,335 INFO L85 PathProgramCache]: Analyzing trace with hash -266539404, now seen corresponding path program 11 times [2024-06-27 20:23:58,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:58,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409571401] [2024-06-27 20:23:58,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:58,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:59,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:59,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409571401] [2024-06-27 20:23:59,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409571401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:59,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:59,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:23:59,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219562118] [2024-06-27 20:23:59,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:59,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:23:59,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:59,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:23:59,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:23:59,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:23:59,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 697 transitions, 10134 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:23:59,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:59,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:23:59,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:01,675 INFO L124 PetriNetUnfolderBase]: 5122/8049 cut-off events. [2024-06-27 20:24:01,675 INFO L125 PetriNetUnfolderBase]: For 2269566/2269574 co-relation queries the response was YES. [2024-06-27 20:24:01,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88423 conditions, 8049 events. 5122/8049 cut-off events. For 2269566/2269574 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 50510 event pairs, 895 based on Foata normal form. 10/8058 useless extension candidates. Maximal degree in co-relation 88199. Up to 7238 conditions per place. [2024-06-27 20:24:01,818 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 543 selfloop transitions, 172 changer transitions 0/719 dead transitions. [2024-06-27 20:24:01,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 719 transitions, 11999 flow [2024-06-27 20:24:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:24:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:24:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:24:01,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:24:01,819 INFO L175 Difference]: Start difference. First operand has 476 places, 697 transitions, 10134 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:24:01,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 719 transitions, 11999 flow [2024-06-27 20:24:12,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 719 transitions, 11675 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 20:24:12,160 INFO L231 Difference]: Finished difference. Result has 481 places, 697 transitions, 10160 flow [2024-06-27 20:24:12,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9810, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10160, PETRI_PLACES=481, PETRI_TRANSITIONS=697} [2024-06-27 20:24:12,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-27 20:24:12,161 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 697 transitions, 10160 flow [2024-06-27 20:24:12,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:24:12,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:12,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:12,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:24:12,161 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:12,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:12,162 INFO L85 PathProgramCache]: Analyzing trace with hash -266330867, now seen corresponding path program 8 times [2024-06-27 20:24:12,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:12,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786872509] [2024-06-27 20:24:12,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:12,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:12,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:12,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786872509] [2024-06-27 20:24:12,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786872509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:12,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:12,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:24:12,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879010050] [2024-06-27 20:24:12,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:12,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:24:12,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:12,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:24:12,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:24:12,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:24:12,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 697 transitions, 10160 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:24:12,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:12,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:24:12,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:15,605 INFO L124 PetriNetUnfolderBase]: 5098/8002 cut-off events. [2024-06-27 20:24:15,605 INFO L125 PetriNetUnfolderBase]: For 2275814/2275816 co-relation queries the response was YES. [2024-06-27 20:24:15,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87086 conditions, 8002 events. 5098/8002 cut-off events. For 2275814/2275816 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 50074 event pairs, 869 based on Foata normal form. 8/8009 useless extension candidates. Maximal degree in co-relation 86861. Up to 7620 conditions per place. [2024-06-27 20:24:15,738 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 649 selfloop transitions, 62 changer transitions 0/715 dead transitions. [2024-06-27 20:24:15,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 715 transitions, 11652 flow [2024-06-27 20:24:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:24:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:24:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:24:15,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:24:15,740 INFO L175 Difference]: Start difference. First operand has 481 places, 697 transitions, 10160 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:24:15,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 715 transitions, 11652 flow [2024-06-27 20:24:27,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 715 transitions, 11242 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 20:24:27,620 INFO L231 Difference]: Finished difference. Result has 482 places, 697 transitions, 9881 flow [2024-06-27 20:24:27,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9750, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9881, PETRI_PLACES=482, PETRI_TRANSITIONS=697} [2024-06-27 20:24:27,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-27 20:24:27,621 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 697 transitions, 9881 flow [2024-06-27 20:24:27,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:24:27,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:27,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:27,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:24:27,621 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:27,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:27,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1344836224, now seen corresponding path program 12 times [2024-06-27 20:24:27,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:27,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243186379] [2024-06-27 20:24:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:27,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:28,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:28,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243186379] [2024-06-27 20:24:28,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243186379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:28,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:28,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:24:28,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872904158] [2024-06-27 20:24:28,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:28,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:24:28,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:28,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:24:28,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:24:28,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:24:28,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 697 transitions, 9881 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:24:28,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:28,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:24:28,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:30,971 INFO L124 PetriNetUnfolderBase]: 5108/8033 cut-off events. [2024-06-27 20:24:30,972 INFO L125 PetriNetUnfolderBase]: For 2231566/2231574 co-relation queries the response was YES. [2024-06-27 20:24:31,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86829 conditions, 8033 events. 5108/8033 cut-off events. For 2231566/2231574 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 50425 event pairs, 886 based on Foata normal form. 10/8042 useless extension candidates. Maximal degree in co-relation 86603. Up to 7720 conditions per place. [2024-06-27 20:24:31,110 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 663 selfloop transitions, 49 changer transitions 0/716 dead transitions. [2024-06-27 20:24:31,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 716 transitions, 11502 flow [2024-06-27 20:24:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:24:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:24:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:24:31,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-27 20:24:31,112 INFO L175 Difference]: Start difference. First operand has 482 places, 697 transitions, 9881 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:24:31,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 716 transitions, 11502 flow [2024-06-27 20:24:44,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 716 transitions, 11299 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 20:24:44,513 INFO L231 Difference]: Finished difference. Result has 482 places, 700 transitions, 9888 flow [2024-06-27 20:24:44,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9678, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9888, PETRI_PLACES=482, PETRI_TRANSITIONS=700} [2024-06-27 20:24:44,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-27 20:24:44,513 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 700 transitions, 9888 flow [2024-06-27 20:24:44,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:24:44,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:44,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:44,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:24:44,514 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:44,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:44,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1436292417, now seen corresponding path program 9 times [2024-06-27 20:24:44,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:44,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833596458] [2024-06-27 20:24:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:44,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:45,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:45,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833596458] [2024-06-27 20:24:45,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833596458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:45,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:45,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:24:45,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696011918] [2024-06-27 20:24:45,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:45,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:24:45,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:45,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:24:45,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:24:45,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:24:45,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 700 transitions, 9888 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:24:45,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:45,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:24:45,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:47,767 INFO L124 PetriNetUnfolderBase]: 5128/8054 cut-off events. [2024-06-27 20:24:47,767 INFO L125 PetriNetUnfolderBase]: For 2285574/2285576 co-relation queries the response was YES. [2024-06-27 20:24:47,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87292 conditions, 8054 events. 5128/8054 cut-off events. For 2285574/2285576 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 50467 event pairs, 901 based on Foata normal form. 4/8057 useless extension candidates. Maximal degree in co-relation 87065. Up to 7803 conditions per place. [2024-06-27 20:24:47,900 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 693 selfloop transitions, 21 changer transitions 0/718 dead transitions. [2024-06-27 20:24:47,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 718 transitions, 11498 flow [2024-06-27 20:24:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:24:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:24:47,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 20:24:47,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-27 20:24:47,901 INFO L175 Difference]: Start difference. First operand has 482 places, 700 transitions, 9888 flow. Second operand 9 states and 140 transitions. [2024-06-27 20:24:47,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 718 transitions, 11498 flow [2024-06-27 20:24:59,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 718 transitions, 11348 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:59,558 INFO L231 Difference]: Finished difference. Result has 485 places, 705 transitions, 9932 flow [2024-06-27 20:24:59,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9738, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9932, PETRI_PLACES=485, PETRI_TRANSITIONS=705} [2024-06-27 20:24:59,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-27 20:24:59,562 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 705 transitions, 9932 flow [2024-06-27 20:24:59,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:24:59,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:59,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:59,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:24:59,563 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:59,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:59,563 INFO L85 PathProgramCache]: Analyzing trace with hash -975371117, now seen corresponding path program 10 times [2024-06-27 20:24:59,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:59,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476860947] [2024-06-27 20:24:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:59,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:00,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:00,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476860947] [2024-06-27 20:25:00,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476860947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:00,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:00,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:00,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721356604] [2024-06-27 20:25:00,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:00,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:00,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:25:00,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 705 transitions, 9932 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:25:00,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:00,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:25:00,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:02,858 INFO L124 PetriNetUnfolderBase]: 5148/8086 cut-off events. [2024-06-27 20:25:02,858 INFO L125 PetriNetUnfolderBase]: For 2320470/2320472 co-relation queries the response was YES. [2024-06-27 20:25:03,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87903 conditions, 8086 events. 5148/8086 cut-off events. For 2320470/2320472 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 50784 event pairs, 905 based on Foata normal form. 4/8089 useless extension candidates. Maximal degree in co-relation 87674. Up to 7817 conditions per place. [2024-06-27 20:25:03,121 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 693 selfloop transitions, 26 changer transitions 0/723 dead transitions. [2024-06-27 20:25:03,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 723 transitions, 11544 flow [2024-06-27 20:25:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:03,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 20:25:03,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:25:03,140 INFO L175 Difference]: Start difference. First operand has 485 places, 705 transitions, 9932 flow. Second operand 9 states and 144 transitions. [2024-06-27 20:25:03,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 723 transitions, 11544 flow [2024-06-27 20:25:14,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 723 transitions, 11402 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-27 20:25:14,064 INFO L231 Difference]: Finished difference. Result has 488 places, 708 transitions, 9966 flow [2024-06-27 20:25:14,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9790, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9966, PETRI_PLACES=488, PETRI_TRANSITIONS=708} [2024-06-27 20:25:14,064 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-27 20:25:14,065 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 708 transitions, 9966 flow [2024-06-27 20:25:14,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:25:14,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:14,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:14,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:25:14,065 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:14,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1857590787, now seen corresponding path program 11 times [2024-06-27 20:25:14,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:14,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925608475] [2024-06-27 20:25:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:14,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:14,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:14,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925608475] [2024-06-27 20:25:14,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925608475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:14,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:14,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:14,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293574044] [2024-06-27 20:25:14,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:14,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:14,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:14,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:14,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:14,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:25:14,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 708 transitions, 9966 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:25:14,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:14,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:25:14,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:17,380 INFO L124 PetriNetUnfolderBase]: 5168/8114 cut-off events. [2024-06-27 20:25:17,381 INFO L125 PetriNetUnfolderBase]: For 2351847/2351849 co-relation queries the response was YES. [2024-06-27 20:25:17,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88351 conditions, 8114 events. 5168/8114 cut-off events. For 2351847/2351849 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 50968 event pairs, 911 based on Foata normal form. 4/8117 useless extension candidates. Maximal degree in co-relation 88121. Up to 7837 conditions per place. [2024-06-27 20:25:17,520 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 696 selfloop transitions, 27 changer transitions 0/727 dead transitions. [2024-06-27 20:25:17,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 727 transitions, 11606 flow [2024-06-27 20:25:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:25:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:25:17,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 20:25:17,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-27 20:25:17,521 INFO L175 Difference]: Start difference. First operand has 488 places, 708 transitions, 9966 flow. Second operand 10 states and 156 transitions. [2024-06-27 20:25:17,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 727 transitions, 11606 flow [2024-06-27 20:25:28,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 727 transitions, 11435 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 20:25:28,852 INFO L231 Difference]: Finished difference. Result has 491 places, 711 transitions, 9979 flow [2024-06-27 20:25:28,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9795, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9979, PETRI_PLACES=491, PETRI_TRANSITIONS=711} [2024-06-27 20:25:28,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-27 20:25:28,853 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 711 transitions, 9979 flow [2024-06-27 20:25:28,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:25:28,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:28,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:28,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 20:25:28,853 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:28,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:28,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1423513070, now seen corresponding path program 13 times [2024-06-27 20:25:28,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:28,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348113810] [2024-06-27 20:25:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:28,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:29,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:29,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348113810] [2024-06-27 20:25:29,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348113810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:29,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:29,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:29,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804360298] [2024-06-27 20:25:29,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:29,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:29,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:29,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:25:29,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 711 transitions, 9979 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:25:29,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:29,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:25:29,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:32,361 INFO L124 PetriNetUnfolderBase]: 5178/8136 cut-off events. [2024-06-27 20:25:32,361 INFO L125 PetriNetUnfolderBase]: For 2353767/2353775 co-relation queries the response was YES. [2024-06-27 20:25:32,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88464 conditions, 8136 events. 5178/8136 cut-off events. For 2353767/2353775 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 51098 event pairs, 894 based on Foata normal form. 10/8145 useless extension candidates. Maximal degree in co-relation 88234. Up to 7838 conditions per place. [2024-06-27 20:25:32,512 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 684 selfloop transitions, 40 changer transitions 0/728 dead transitions. [2024-06-27 20:25:32,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 728 transitions, 11602 flow [2024-06-27 20:25:32,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:25:32,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-27 20:25:32,513 INFO L175 Difference]: Start difference. First operand has 491 places, 711 transitions, 9979 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:25:32,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 728 transitions, 11602 flow [2024-06-27 20:25:43,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 728 transitions, 11458 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-27 20:25:43,847 INFO L231 Difference]: Finished difference. Result has 493 places, 714 transitions, 10033 flow [2024-06-27 20:25:43,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9835, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10033, PETRI_PLACES=493, PETRI_TRANSITIONS=714} [2024-06-27 20:25:43,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-27 20:25:43,848 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 714 transitions, 10033 flow [2024-06-27 20:25:43,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:25:43,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:43,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:43,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 20:25:43,848 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:43,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:43,849 INFO L85 PathProgramCache]: Analyzing trace with hash 848813087, now seen corresponding path program 12 times [2024-06-27 20:25:43,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:43,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896431075] [2024-06-27 20:25:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:43,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:44,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:44,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896431075] [2024-06-27 20:25:44,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896431075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:44,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:44,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:44,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090525978] [2024-06-27 20:25:44,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:44,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:44,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:44,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:44,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:44,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:25:44,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 714 transitions, 10033 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-27 20:25:44,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:44,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:25:44,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:47,181 INFO L124 PetriNetUnfolderBase]: 5198/8159 cut-off events. [2024-06-27 20:25:47,181 INFO L125 PetriNetUnfolderBase]: For 2408563/2408571 co-relation queries the response was YES. [2024-06-27 20:25:47,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88822 conditions, 8159 events. 5198/8159 cut-off events. For 2408563/2408571 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 51270 event pairs, 906 based on Foata normal form. 12/8170 useless extension candidates. Maximal degree in co-relation 88591. Up to 7775 conditions per place. [2024-06-27 20:25:47,322 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 674 selfloop transitions, 61 changer transitions 0/739 dead transitions. [2024-06-27 20:25:47,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 739 transitions, 12172 flow [2024-06-27 20:25:47,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:25:47,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-27 20:25:47,323 INFO L175 Difference]: Start difference. First operand has 493 places, 714 transitions, 10033 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:25:47,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 739 transitions, 12172 flow Killed by 15