./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 17:20:38,156 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:20:38,218 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:20:38,223 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:20:38,223 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:20:38,246 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:20:38,246 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:20:38,246 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:20:38,247 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:20:38,249 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:20:38,250 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:20:38,250 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:20:38,251 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:20:38,251 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:20:38,252 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:20:38,252 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:20:38,252 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:20:38,252 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:20:38,252 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:20:38,252 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:20:38,253 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:20:38,253 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:20:38,253 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:20:38,253 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:20:38,253 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:20:38,253 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:20:38,254 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:20:38,254 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:20:38,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:20:38,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:20:38,255 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:20:38,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:20:38,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:20:38,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:20:38,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:20:38,256 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:20:38,256 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:20:38,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:20:38,256 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:20:38,256 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:20:38,256 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:20:38,256 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:20:38,257 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:20:38,257 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:20:38,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:20:38,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:20:38,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:20:38,511 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:20:38,512 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:20:38,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-20 17:20:38,663 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:20:38,663 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:20:38,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-20 17:20:39,683 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:20:39,882 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:20:39,882 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-20 17:20:39,893 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55e6d27d4/1f2cd39bcfb742dd9b92772e118f44be/FLAG08a996282 [2024-06-20 17:20:39,903 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55e6d27d4/1f2cd39bcfb742dd9b92772e118f44be [2024-06-20 17:20:39,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:20:39,905 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:20:39,906 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:20:39,906 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:20:39,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:20:39,910 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:20:38" (1/2) ... [2024-06-20 17:20:39,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a4a7e3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:20:39, skipping insertion in model container [2024-06-20 17:20:39,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:20:38" (1/2) ... [2024-06-20 17:20:39,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5009690d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:20:39, skipping insertion in model container [2024-06-20 17:20:39,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:20:39" (2/2) ... [2024-06-20 17:20:39,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a4a7e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:39, skipping insertion in model container [2024-06-20 17:20:39,912 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:20:39" (2/2) ... [2024-06-20 17:20:39,913 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:20:39,977 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:20:39,979 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-20 17:20:39,979 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$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 || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-20 17:20:39,979 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-20 17:20:39,979 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:20:39,979 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-20 17:20:40,023 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:20:40,333 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:20:40,342 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:20:40,468 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:20:40,498 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:20:40,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40 WrapperNode [2024-06-20 17:20:40,499 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:20:40,499 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:20:40,499 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:20:40,499 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:20:40,504 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40" (1/1) ... [2024-06-20 17:20:40,517 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40" (1/1) ... [2024-06-20 17:20:40,560 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-20 17:20:40,560 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:20:40,561 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:20:40,561 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:20:40,561 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:20:40,610 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40" (1/1) ... [2024-06-20 17:20:40,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40" (1/1) ... [2024-06-20 17:20:40,615 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40" (1/1) ... [2024-06-20 17:20:40,651 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 17:20:40,658 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40" (1/1) ... [2024-06-20 17:20:40,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40" (1/1) ... [2024-06-20 17:20:40,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40" (1/1) ... [2024-06-20 17:20:40,672 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40" (1/1) ... [2024-06-20 17:20:40,678 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40" (1/1) ... [2024-06-20 17:20:40,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40" (1/1) ... [2024-06-20 17:20:40,683 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:20:40,686 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:20:40,686 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:20:40,687 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:20:40,687 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40" (1/1) ... [2024-06-20 17:20:40,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:20:40,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:20:40,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 17:20:40,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 17:20:40,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:20:40,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:20:40,750 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:20:40,750 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:20:40,751 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:20:40,751 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:20:40,751 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:20:40,751 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:20:40,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:20:40,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:20:40,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:20:40,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:20:40,752 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:20:40,891 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:20:40,893 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:20:41,194 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:20:41,194 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:20:41,295 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:20:41,295 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:20:41,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:20:41 BoogieIcfgContainer [2024-06-20 17:20:41,295 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:20:41,297 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:20:41,297 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:20:41,299 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:20:41,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:20:38" (1/4) ... [2024-06-20 17:20:41,300 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a07b7e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:20:41, skipping insertion in model container [2024-06-20 17:20:41,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:20:39" (2/4) ... [2024-06-20 17:20:41,300 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a07b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:20:41, skipping insertion in model container [2024-06-20 17:20:41,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:20:40" (3/4) ... [2024-06-20 17:20:41,301 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a07b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:20:41, skipping insertion in model container [2024-06-20 17:20:41,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:20:41" (4/4) ... [2024-06-20 17:20:41,302 INFO L112 eAbstractionObserver]: Analyzing ICFG safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-20 17:20:41,314 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:20:41,314 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:20:41,315 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:20:41,374 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:20:41,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 17:20:41,428 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 17:20:41,429 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:20:41,431 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 62 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. [2024-06-20 17:20:41,431 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 17:20:41,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 17:20:41,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:20:41,451 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;@3efff1af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:20:41,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:20:41,456 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:20:41,456 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:20:41,456 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:20:41,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:41,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:20:41,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:41,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash 363617411, now seen corresponding path program 1 times [2024-06-20 17:20:41,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:41,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47906651] [2024-06-20 17:20:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:41,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:42,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:42,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47906651] [2024-06-20 17:20:42,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47906651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:42,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:42,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:20:42,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544609617] [2024-06-20 17:20:42,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:42,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:20:42,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:42,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:20:42,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:20:42,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 17:20:42,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:42,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:42,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 17:20:42,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:42,761 INFO L124 PetriNetUnfolderBase]: 942/1465 cut-off events. [2024-06-20 17:20:42,761 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-20 17:20:42,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2981 conditions, 1465 events. 942/1465 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7325 event pairs, 546 based on Foata normal form. 2/1426 useless extension candidates. Maximal degree in co-relation 2969. Up to 1428 conditions per place. [2024-06-20 17:20:42,774 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-20 17:20:42,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 171 flow [2024-06-20 17:20:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:20:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:20:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-20 17:20:42,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-20 17:20:42,785 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 80 transitions. [2024-06-20 17:20:42,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 171 flow [2024-06-20 17:20:42,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:20:42,790 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 17:20:42,792 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} [2024-06-20 17:20:42,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 17:20:42,794 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 17:20:42,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:42,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:42,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:42,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:20:42,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:42,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:42,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1544011682, now seen corresponding path program 1 times [2024-06-20 17:20:42,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:42,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125121424] [2024-06-20 17:20:42,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:42,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:43,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:43,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125121424] [2024-06-20 17:20:43,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125121424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:43,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:43,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:20:43,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985772277] [2024-06-20 17:20:43,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:43,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:20:43,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:43,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:20:43,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:20:43,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-20 17:20:43,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:43,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:43,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-20 17:20:43,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:43,700 INFO L124 PetriNetUnfolderBase]: 1134/1735 cut-off events. [2024-06-20 17:20:43,700 INFO L125 PetriNetUnfolderBase]: For 279/279 co-relation queries the response was YES. [2024-06-20 17:20:43,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4012 conditions, 1735 events. 1134/1735 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8267 event pairs, 590 based on Foata normal form. 6/1738 useless extension candidates. Maximal degree in co-relation 4000. Up to 1676 conditions per place. [2024-06-20 17:20:43,708 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-20 17:20:43,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 256 flow [2024-06-20 17:20:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:20:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:20:43,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-20 17:20:43,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 17:20:43,711 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 101 transitions. [2024-06-20 17:20:43,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 256 flow [2024-06-20 17:20:43,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:20:43,714 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-20 17:20:43,714 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-20 17:20:43,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-20 17:20:43,715 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-20 17:20:43,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:43,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:43,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:43,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:20:43,718 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:43,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:43,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1973259754, now seen corresponding path program 1 times [2024-06-20 17:20:43,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:43,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004613979] [2024-06-20 17:20:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:43,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:44,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:44,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004613979] [2024-06-20 17:20:44,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004613979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:44,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:44,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:20:44,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102248887] [2024-06-20 17:20:44,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:44,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:20:44,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:44,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:20:44,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:20:44,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-20 17:20:44,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:44,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:44,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-20 17:20:44,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:44,860 INFO L124 PetriNetUnfolderBase]: 980/1528 cut-off events. [2024-06-20 17:20:44,860 INFO L125 PetriNetUnfolderBase]: For 738/740 co-relation queries the response was YES. [2024-06-20 17:20:44,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3911 conditions, 1528 events. 980/1528 cut-off events. For 738/740 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7446 event pairs, 562 based on Foata normal form. 3/1492 useless extension candidates. Maximal degree in co-relation 3895. Up to 1473 conditions per place. [2024-06-20 17:20:44,866 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 40 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2024-06-20 17:20:44,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 306 flow [2024-06-20 17:20:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:20:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:20:44,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-20 17:20:44,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-20 17:20:44,868 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 105 transitions. [2024-06-20 17:20:44,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 306 flow [2024-06-20 17:20:44,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 304 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 17:20:44,870 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 221 flow [2024-06-20 17:20:44,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-06-20 17:20:44,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-20 17:20:44,871 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 221 flow [2024-06-20 17:20:44,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:44,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:44,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:44,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:20:44,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:44,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:44,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1898268192, now seen corresponding path program 1 times [2024-06-20 17:20:44,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:44,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506392812] [2024-06-20 17:20:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:44,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:45,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:45,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506392812] [2024-06-20 17:20:45,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506392812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:45,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:45,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:20:45,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918473237] [2024-06-20 17:20:45,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:45,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:20:45,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:45,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:20:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:20:45,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-20 17:20:45,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:45,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:45,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-20 17:20:45,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:46,193 INFO L124 PetriNetUnfolderBase]: 1122/1716 cut-off events. [2024-06-20 17:20:46,193 INFO L125 PetriNetUnfolderBase]: For 1611/1619 co-relation queries the response was YES. [2024-06-20 17:20:46,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5029 conditions, 1716 events. 1122/1716 cut-off events. For 1611/1619 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8142 event pairs, 380 based on Foata normal form. 12/1725 useless extension candidates. Maximal degree in co-relation 5009. Up to 1627 conditions per place. [2024-06-20 17:20:46,203 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-20 17:20:46,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 77 transitions, 443 flow [2024-06-20 17:20:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:20:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:20:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 17:20:46,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-20 17:20:46,205 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 221 flow. Second operand 6 states and 142 transitions. [2024-06-20 17:20:46,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 77 transitions, 443 flow [2024-06-20 17:20:46,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 77 transitions, 430 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 17:20:46,208 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 265 flow [2024-06-20 17:20:46,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-20 17:20:46,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-20 17:20:46,209 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 265 flow [2024-06-20 17:20:46,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:46,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:46,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:46,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:20:46,209 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:46,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:46,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1032572233, now seen corresponding path program 1 times [2024-06-20 17:20:46,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:46,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289260469] [2024-06-20 17:20:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:46,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:46,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:46,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289260469] [2024-06-20 17:20:46,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289260469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:46,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:46,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:20:46,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101454602] [2024-06-20 17:20:46,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:46,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:20:46,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:46,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:20:46,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:20:47,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:20:47,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:47,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:47,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:20:47,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:47,344 INFO L124 PetriNetUnfolderBase]: 1174/1819 cut-off events. [2024-06-20 17:20:47,345 INFO L125 PetriNetUnfolderBase]: For 2968/2972 co-relation queries the response was YES. [2024-06-20 17:20:47,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5730 conditions, 1819 events. 1174/1819 cut-off events. For 2968/2972 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8884 event pairs, 513 based on Foata normal form. 2/1793 useless extension candidates. Maximal degree in co-relation 5707. Up to 1719 conditions per place. [2024-06-20 17:20:47,356 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-20 17:20:47,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 75 transitions, 481 flow [2024-06-20 17:20:47,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:20:47,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:20:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-20 17:20:47,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 17:20:47,358 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 265 flow. Second operand 6 states and 117 transitions. [2024-06-20 17:20:47,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 75 transitions, 481 flow [2024-06-20 17:20:47,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 452 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 17:20:47,367 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 336 flow [2024-06-20 17:20:47,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-06-20 17:20:47,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-20 17:20:47,369 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 336 flow [2024-06-20 17:20:47,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:47,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:47,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:47,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:20:47,371 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:47,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:47,371 INFO L85 PathProgramCache]: Analyzing trace with hash 599554585, now seen corresponding path program 1 times [2024-06-20 17:20:47,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:47,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046254716] [2024-06-20 17:20:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:47,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:47,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:47,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046254716] [2024-06-20 17:20:47,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046254716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:47,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:47,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:20:47,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011416134] [2024-06-20 17:20:47,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:47,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:20:47,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:47,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:20:47,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:20:48,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:20:48,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 336 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:48,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:48,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:20:48,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:48,435 INFO L124 PetriNetUnfolderBase]: 1263/1941 cut-off events. [2024-06-20 17:20:48,436 INFO L125 PetriNetUnfolderBase]: For 3886/3903 co-relation queries the response was YES. [2024-06-20 17:20:48,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6559 conditions, 1941 events. 1263/1941 cut-off events. For 3886/3903 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9379 event pairs, 500 based on Foata normal form. 16/1948 useless extension candidates. Maximal degree in co-relation 6532. Up to 1853 conditions per place. [2024-06-20 17:20:48,448 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 60 selfloop transitions, 13 changer transitions 0/82 dead transitions. [2024-06-20 17:20:48,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 82 transitions, 546 flow [2024-06-20 17:20:48,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:20:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:20:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-20 17:20:48,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-20 17:20:48,451 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 336 flow. Second operand 6 states and 121 transitions. [2024-06-20 17:20:48,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 82 transitions, 546 flow [2024-06-20 17:20:48,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 540 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-20 17:20:48,456 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 384 flow [2024-06-20 17:20:48,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=384, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-20 17:20:48,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-20 17:20:48,459 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 384 flow [2024-06-20 17:20:48,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:48,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:48,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:48,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:20:48,460 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:48,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:48,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2072934645, now seen corresponding path program 2 times [2024-06-20 17:20:48,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:48,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723908784] [2024-06-20 17:20:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:49,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:49,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723908784] [2024-06-20 17:20:49,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723908784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:49,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:49,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:20:49,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451662328] [2024-06-20 17:20:49,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:49,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:20:49,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:49,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:20:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:20:49,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:20:49,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 384 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:49,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:49,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:20:49,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:49,534 INFO L124 PetriNetUnfolderBase]: 1293/1987 cut-off events. [2024-06-20 17:20:49,535 INFO L125 PetriNetUnfolderBase]: For 5428/5446 co-relation queries the response was YES. [2024-06-20 17:20:49,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7322 conditions, 1987 events. 1293/1987 cut-off events. For 5428/5446 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9662 event pairs, 499 based on Foata normal form. 13/1987 useless extension candidates. Maximal degree in co-relation 7292. Up to 1865 conditions per place. [2024-06-20 17:20:49,546 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 19 changer transitions 0/86 dead transitions. [2024-06-20 17:20:49,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 624 flow [2024-06-20 17:20:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:20:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:20:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-20 17:20:49,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-20 17:20:49,548 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 384 flow. Second operand 6 states and 121 transitions. [2024-06-20 17:20:49,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 624 flow [2024-06-20 17:20:49,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 594 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 17:20:49,553 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 462 flow [2024-06-20 17:20:49,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=462, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-20 17:20:49,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-20 17:20:49,555 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 462 flow [2024-06-20 17:20:49,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:49,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:49,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:49,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:20:49,555 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:49,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:49,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2072943573, now seen corresponding path program 1 times [2024-06-20 17:20:49,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:49,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603189682] [2024-06-20 17:20:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:49,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:50,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:50,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603189682] [2024-06-20 17:20:50,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603189682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:50,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:50,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:20:50,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697680067] [2024-06-20 17:20:50,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:50,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:20:50,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:50,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:20:50,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:20:50,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:20:50,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 462 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:50,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:50,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:20:50,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:50,861 INFO L124 PetriNetUnfolderBase]: 1263/1955 cut-off events. [2024-06-20 17:20:50,862 INFO L125 PetriNetUnfolderBase]: For 7340/7364 co-relation queries the response was YES. [2024-06-20 17:20:50,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7606 conditions, 1955 events. 1263/1955 cut-off events. For 7340/7364 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9675 event pairs, 503 based on Foata normal form. 2/1925 useless extension candidates. Maximal degree in co-relation 7574. Up to 1822 conditions per place. [2024-06-20 17:20:50,875 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 64 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-20 17:20:50,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 680 flow [2024-06-20 17:20:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 17:20:50,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-20 17:20:50,877 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 462 flow. Second operand 7 states and 135 transitions. [2024-06-20 17:20:50,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 680 flow [2024-06-20 17:20:50,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 91 transitions, 649 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 17:20:50,882 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 487 flow [2024-06-20 17:20:50,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=487, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-06-20 17:20:50,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-20 17:20:50,883 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 487 flow [2024-06-20 17:20:50,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:50,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:50,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:50,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:20:50,884 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:50,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:50,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1406323648, now seen corresponding path program 1 times [2024-06-20 17:20:50,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:50,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622828265] [2024-06-20 17:20:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:50,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:51,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:51,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622828265] [2024-06-20 17:20:51,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622828265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:51,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:51,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:20:51,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389837096] [2024-06-20 17:20:51,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:51,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:20:51,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:51,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:20:51,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:20:51,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:20:51,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 487 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) [2024-06-20 17:20:51,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:51,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:20:51,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:51,973 INFO L124 PetriNetUnfolderBase]: 1364/2085 cut-off events. [2024-06-20 17:20:51,973 INFO L125 PetriNetUnfolderBase]: For 8370/8370 co-relation queries the response was YES. [2024-06-20 17:20:51,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8518 conditions, 2085 events. 1364/2085 cut-off events. For 8370/8370 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10012 event pairs, 518 based on Foata normal form. 4/2086 useless extension candidates. Maximal degree in co-relation 8484. Up to 1981 conditions per place. [2024-06-20 17:20:51,984 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 86 selfloop transitions, 14 changer transitions 0/105 dead transitions. [2024-06-20 17:20:51,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 105 transitions, 811 flow [2024-06-20 17:20:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-20 17:20:51,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-20 17:20:51,986 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 487 flow. Second operand 7 states and 134 transitions. [2024-06-20 17:20:51,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 105 transitions, 811 flow [2024-06-20 17:20:51,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 105 transitions, 779 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:51,990 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 573 flow [2024-06-20 17:20:51,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=573, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-20 17:20:51,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-20 17:20:51,991 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 573 flow [2024-06-20 17:20:51,991 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) [2024-06-20 17:20:51,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:51,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:51,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:20:51,992 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:51,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:51,992 INFO L85 PathProgramCache]: Analyzing trace with hash -163527308, now seen corresponding path program 2 times [2024-06-20 17:20:51,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:51,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954254358] [2024-06-20 17:20:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:51,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:52,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:52,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954254358] [2024-06-20 17:20:52,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954254358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:52,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:52,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:20:52,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598916294] [2024-06-20 17:20:52,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:52,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:20:52,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:52,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:20:52,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:20:52,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:20:52,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 573 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) [2024-06-20 17:20:52,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:52,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:20:52,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:53,126 INFO L124 PetriNetUnfolderBase]: 1402/2140 cut-off events. [2024-06-20 17:20:53,126 INFO L125 PetriNetUnfolderBase]: For 10953/10953 co-relation queries the response was YES. [2024-06-20 17:20:53,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9311 conditions, 2140 events. 1402/2140 cut-off events. For 10953/10953 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10384 event pairs, 523 based on Foata normal form. 4/2138 useless extension candidates. Maximal degree in co-relation 9274. Up to 1953 conditions per place. [2024-06-20 17:20:53,143 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 82 selfloop transitions, 27 changer transitions 0/114 dead transitions. [2024-06-20 17:20:53,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 957 flow [2024-06-20 17:20:53,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 17:20:53,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-20 17:20:53,144 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 573 flow. Second operand 7 states and 137 transitions. [2024-06-20 17:20:53,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 957 flow [2024-06-20 17:20:53,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 114 transitions, 931 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-20 17:20:53,152 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 695 flow [2024-06-20 17:20:53,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=695, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2024-06-20 17:20:53,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-20 17:20:53,153 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 695 flow [2024-06-20 17:20:53,154 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) [2024-06-20 17:20:53,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:53,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:53,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:20:53,154 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:53,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:53,155 INFO L85 PathProgramCache]: Analyzing trace with hash -164724040, now seen corresponding path program 3 times [2024-06-20 17:20:53,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:53,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250659626] [2024-06-20 17:20:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:53,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:53,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:53,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250659626] [2024-06-20 17:20:53,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250659626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:53,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:53,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:20:53,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932537633] [2024-06-20 17:20:53,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:53,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:20:53,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:20:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:20:53,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:20:53,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 695 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) [2024-06-20 17:20:53,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:53,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:20:53,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:54,320 INFO L124 PetriNetUnfolderBase]: 1392/2131 cut-off events. [2024-06-20 17:20:54,320 INFO L125 PetriNetUnfolderBase]: For 13482/13482 co-relation queries the response was YES. [2024-06-20 17:20:54,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9856 conditions, 2131 events. 1392/2131 cut-off events. For 13482/13482 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10370 event pairs, 528 based on Foata normal form. 4/2129 useless extension candidates. Maximal degree in co-relation 9816. Up to 1945 conditions per place. [2024-06-20 17:20:54,333 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 81 selfloop transitions, 26 changer transitions 0/112 dead transitions. [2024-06-20 17:20:54,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 969 flow [2024-06-20 17:20:54,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:54,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 17:20:54,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-20 17:20:54,335 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 695 flow. Second operand 7 states and 136 transitions. [2024-06-20 17:20:54,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 969 flow [2024-06-20 17:20:54,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 112 transitions, 929 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-20 17:20:54,347 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 715 flow [2024-06-20 17:20:54,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=715, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2024-06-20 17:20:54,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-20 17:20:54,348 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 715 flow [2024-06-20 17:20:54,348 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) [2024-06-20 17:20:54,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:54,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:54,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:20:54,348 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:54,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:54,349 INFO L85 PathProgramCache]: Analyzing trace with hash -163257918, now seen corresponding path program 1 times [2024-06-20 17:20:54,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:54,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154535392] [2024-06-20 17:20:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:54,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:55,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:55,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154535392] [2024-06-20 17:20:55,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154535392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:55,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:55,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:55,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624570359] [2024-06-20 17:20:55,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:55,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:55,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:55,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:55,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:55,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:20:55,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 715 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:55,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:55,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:20:55,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:55,697 INFO L124 PetriNetUnfolderBase]: 1310/2042 cut-off events. [2024-06-20 17:20:55,697 INFO L125 PetriNetUnfolderBase]: For 15214/15246 co-relation queries the response was YES. [2024-06-20 17:20:55,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9576 conditions, 2042 events. 1310/2042 cut-off events. For 15214/15246 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10129 event pairs, 476 based on Foata normal form. 4/2019 useless extension candidates. Maximal degree in co-relation 9534. Up to 1870 conditions per place. [2024-06-20 17:20:55,712 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 87 selfloop transitions, 16 changer transitions 0/116 dead transitions. [2024-06-20 17:20:55,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 116 transitions, 997 flow [2024-06-20 17:20:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 17:20:55,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-20 17:20:55,714 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 715 flow. Second operand 8 states and 153 transitions. [2024-06-20 17:20:55,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 116 transitions, 997 flow [2024-06-20 17:20:55,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 116 transitions, 913 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:20:55,725 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 690 flow [2024-06-20 17:20:55,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=690, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2024-06-20 17:20:55,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-20 17:20:55,726 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 690 flow [2024-06-20 17:20:55,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:55,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:55,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:55,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:20:55,727 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:55,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1404300244, now seen corresponding path program 1 times [2024-06-20 17:20:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:55,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695671080] [2024-06-20 17:20:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:55,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:56,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:56,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695671080] [2024-06-20 17:20:56,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695671080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:56,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:56,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:20:56,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115885344] [2024-06-20 17:20:56,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:56,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:20:56,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:56,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:20:56,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:20:56,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:20:56,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 690 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:56,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:56,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:20:56,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:57,094 INFO L124 PetriNetUnfolderBase]: 1332/2060 cut-off events. [2024-06-20 17:20:57,094 INFO L125 PetriNetUnfolderBase]: For 17799/17842 co-relation queries the response was YES. [2024-06-20 17:20:57,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9895 conditions, 2060 events. 1332/2060 cut-off events. For 17799/17842 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10173 event pairs, 464 based on Foata normal form. 21/2031 useless extension candidates. Maximal degree in co-relation 9854. Up to 1897 conditions per place. [2024-06-20 17:20:57,108 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 85 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-06-20 17:20:57,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 120 transitions, 990 flow [2024-06-20 17:20:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:57,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-20 17:20:57,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-20 17:20:57,117 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 690 flow. Second operand 7 states and 141 transitions. [2024-06-20 17:20:57,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 120 transitions, 990 flow [2024-06-20 17:20:57,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 120 transitions, 949 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 17:20:57,130 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 729 flow [2024-06-20 17:20:57,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=729, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-06-20 17:20:57,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-20 17:20:57,131 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 729 flow [2024-06-20 17:20:57,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:20:57,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:57,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:57,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:20:57,132 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:57,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:57,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1409068788, now seen corresponding path program 1 times [2024-06-20 17:20:57,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:57,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808506459] [2024-06-20 17:20:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:57,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:58,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:58,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808506459] [2024-06-20 17:20:58,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808506459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:58,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:58,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:58,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414948041] [2024-06-20 17:20:58,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:58,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:58,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:58,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:58,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:58,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:20:58,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 729 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) [2024-06-20 17:20:58,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:58,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:20:58,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:58,631 INFO L124 PetriNetUnfolderBase]: 1398/2140 cut-off events. [2024-06-20 17:20:58,631 INFO L125 PetriNetUnfolderBase]: For 19165/19165 co-relation queries the response was YES. [2024-06-20 17:20:58,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10477 conditions, 2140 events. 1398/2140 cut-off events. For 19165/19165 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10353 event pairs, 484 based on Foata normal form. 4/2141 useless extension candidates. Maximal degree in co-relation 10435. Up to 2013 conditions per place. [2024-06-20 17:20:58,643 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 104 selfloop transitions, 18 changer transitions 0/127 dead transitions. [2024-06-20 17:20:58,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 127 transitions, 1077 flow [2024-06-20 17:20:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 17:20:58,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:20:58,645 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 729 flow. Second operand 8 states and 152 transitions. [2024-06-20 17:20:58,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 127 transitions, 1077 flow [2024-06-20 17:20:58,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 127 transitions, 1023 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:58,657 INFO L231 Difference]: Finished difference. Result has 94 places, 99 transitions, 758 flow [2024-06-20 17:20:58,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=758, PETRI_PLACES=94, PETRI_TRANSITIONS=99} [2024-06-20 17:20:58,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-20 17:20:58,659 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 99 transitions, 758 flow [2024-06-20 17:20:58,659 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) [2024-06-20 17:20:58,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:58,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:58,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:20:58,659 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:20:58,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash -766334954, now seen corresponding path program 2 times [2024-06-20 17:20:58,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:58,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170562286] [2024-06-20 17:20:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:58,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:59,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:59,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170562286] [2024-06-20 17:20:59,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170562286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:59,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:59,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:59,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693760179] [2024-06-20 17:20:59,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:59,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:59,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:59,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:59,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:59,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:20:59,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 99 transitions, 758 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) [2024-06-20 17:20:59,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:59,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:20:59,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:00,018 INFO L124 PetriNetUnfolderBase]: 1420/2172 cut-off events. [2024-06-20 17:21:00,019 INFO L125 PetriNetUnfolderBase]: For 22441/22441 co-relation queries the response was YES. [2024-06-20 17:21:00,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11201 conditions, 2172 events. 1420/2172 cut-off events. For 22441/22441 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10512 event pairs, 484 based on Foata normal form. 4/2170 useless extension candidates. Maximal degree in co-relation 11158. Up to 1968 conditions per place. [2024-06-20 17:21:00,033 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 93 selfloop transitions, 31 changer transitions 0/129 dead transitions. [2024-06-20 17:21:00,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 129 transitions, 1120 flow [2024-06-20 17:21:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 17:21:00,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-20 17:21:00,035 INFO L175 Difference]: Start difference. First operand has 94 places, 99 transitions, 758 flow. Second operand 8 states and 153 transitions. [2024-06-20 17:21:00,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 129 transitions, 1120 flow [2024-06-20 17:21:00,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 129 transitions, 1067 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:00,053 INFO L231 Difference]: Finished difference. Result has 96 places, 103 transitions, 822 flow [2024-06-20 17:21:00,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=822, PETRI_PLACES=96, PETRI_TRANSITIONS=103} [2024-06-20 17:21:00,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-20 17:21:00,054 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 103 transitions, 822 flow [2024-06-20 17:21:00,054 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) [2024-06-20 17:21:00,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:00,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:00,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:21:00,055 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:00,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:00,055 INFO L85 PathProgramCache]: Analyzing trace with hash -766038284, now seen corresponding path program 3 times [2024-06-20 17:21:00,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:00,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251434553] [2024-06-20 17:21:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:00,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:00,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:00,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251434553] [2024-06-20 17:21:00,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251434553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:00,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:00,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:00,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804076005] [2024-06-20 17:21:00,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:00,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:00,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:00,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:00,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:01,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:01,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 822 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) [2024-06-20 17:21:01,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:01,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:01,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:01,595 INFO L124 PetriNetUnfolderBase]: 1447/2211 cut-off events. [2024-06-20 17:21:01,596 INFO L125 PetriNetUnfolderBase]: For 26315/26315 co-relation queries the response was YES. [2024-06-20 17:21:01,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12072 conditions, 2211 events. 1447/2211 cut-off events. For 26315/26315 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10688 event pairs, 484 based on Foata normal form. 2/2207 useless extension candidates. Maximal degree in co-relation 12028. Up to 1949 conditions per place. [2024-06-20 17:21:01,608 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 92 selfloop transitions, 45 changer transitions 0/142 dead transitions. [2024-06-20 17:21:01,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 142 transitions, 1326 flow [2024-06-20 17:21:01,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 17:21:01,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 17:21:01,617 INFO L175 Difference]: Start difference. First operand has 96 places, 103 transitions, 822 flow. Second operand 9 states and 174 transitions. [2024-06-20 17:21:01,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 142 transitions, 1326 flow [2024-06-20 17:21:01,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 142 transitions, 1239 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:01,634 INFO L231 Difference]: Finished difference. Result has 100 places, 110 transitions, 936 flow [2024-06-20 17:21:01,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=936, PETRI_PLACES=100, PETRI_TRANSITIONS=110} [2024-06-20 17:21:01,635 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-20 17:21:01,635 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 110 transitions, 936 flow [2024-06-20 17:21:01,635 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) [2024-06-20 17:21:01,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:01,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:01,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:21:01,635 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:01,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:01,636 INFO L85 PathProgramCache]: Analyzing trace with hash -774609164, now seen corresponding path program 4 times [2024-06-20 17:21:01,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:01,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216669399] [2024-06-20 17:21:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:01,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:02,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:02,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216669399] [2024-06-20 17:21:02,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216669399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:02,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:02,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:02,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769899820] [2024-06-20 17:21:02,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:02,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:02,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:02,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:02,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:02,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:02,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 110 transitions, 936 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) [2024-06-20 17:21:02,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:02,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:02,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:02,974 INFO L124 PetriNetUnfolderBase]: 1437/2197 cut-off events. [2024-06-20 17:21:02,974 INFO L125 PetriNetUnfolderBase]: For 30775/30775 co-relation queries the response was YES. [2024-06-20 17:21:02,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12728 conditions, 2197 events. 1437/2197 cut-off events. For 30775/30775 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10665 event pairs, 489 based on Foata normal form. 4/2195 useless extension candidates. Maximal degree in co-relation 12682. Up to 1993 conditions per place. [2024-06-20 17:21:02,987 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 101 selfloop transitions, 30 changer transitions 0/136 dead transitions. [2024-06-20 17:21:02,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 136 transitions, 1292 flow [2024-06-20 17:21:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 17:21:02,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 17:21:02,989 INFO L175 Difference]: Start difference. First operand has 100 places, 110 transitions, 936 flow. Second operand 8 states and 154 transitions. [2024-06-20 17:21:02,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 136 transitions, 1292 flow [2024-06-20 17:21:03,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 136 transitions, 1216 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:03,008 INFO L231 Difference]: Finished difference. Result has 103 places, 110 transitions, 929 flow [2024-06-20 17:21:03,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=929, PETRI_PLACES=103, PETRI_TRANSITIONS=110} [2024-06-20 17:21:03,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-20 17:21:03,009 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 110 transitions, 929 flow [2024-06-20 17:21:03,009 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) [2024-06-20 17:21:03,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:03,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:03,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:21:03,009 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:03,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:03,010 INFO L85 PathProgramCache]: Analyzing trace with hash -737669787, now seen corresponding path program 1 times [2024-06-20 17:21:03,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:03,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581729221] [2024-06-20 17:21:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:03,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:03,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:03,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581729221] [2024-06-20 17:21:03,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581729221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:03,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:03,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:03,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736692361] [2024-06-20 17:21:03,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:03,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:03,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:03,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:03,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:03,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:03,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 110 transitions, 929 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) [2024-06-20 17:21:03,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:03,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:03,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:04,389 INFO L124 PetriNetUnfolderBase]: 1483/2283 cut-off events. [2024-06-20 17:21:04,390 INFO L125 PetriNetUnfolderBase]: For 33435/33435 co-relation queries the response was YES. [2024-06-20 17:21:04,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13345 conditions, 2283 events. 1483/2283 cut-off events. For 33435/33435 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11142 event pairs, 491 based on Foata normal form. 2/2282 useless extension candidates. Maximal degree in co-relation 13297. Up to 2163 conditions per place. [2024-06-20 17:21:04,403 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 127 selfloop transitions, 22 changer transitions 0/154 dead transitions. [2024-06-20 17:21:04,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 154 transitions, 1443 flow [2024-06-20 17:21:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:04,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:21:04,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 17:21:04,405 INFO L175 Difference]: Start difference. First operand has 103 places, 110 transitions, 929 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:21:04,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 154 transitions, 1443 flow [2024-06-20 17:21:04,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 154 transitions, 1356 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:04,423 INFO L231 Difference]: Finished difference. Result has 108 places, 124 transitions, 1062 flow [2024-06-20 17:21:04,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1062, PETRI_PLACES=108, PETRI_TRANSITIONS=124} [2024-06-20 17:21:04,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-20 17:21:04,424 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 124 transitions, 1062 flow [2024-06-20 17:21:04,424 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) [2024-06-20 17:21:04,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:04,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:04,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:21:04,424 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:04,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1585474111, now seen corresponding path program 2 times [2024-06-20 17:21:04,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:04,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099972822] [2024-06-20 17:21:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:04,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:05,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:05,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099972822] [2024-06-20 17:21:05,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099972822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:05,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:05,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:05,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549798413] [2024-06-20 17:21:05,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:05,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:05,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:05,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:05,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:05,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:05,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 124 transitions, 1062 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) [2024-06-20 17:21:05,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:05,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:05,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:05,857 INFO L124 PetriNetUnfolderBase]: 1478/2276 cut-off events. [2024-06-20 17:21:05,857 INFO L125 PetriNetUnfolderBase]: For 36655/36655 co-relation queries the response was YES. [2024-06-20 17:21:05,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13701 conditions, 2276 events. 1478/2276 cut-off events. For 36655/36655 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11056 event pairs, 467 based on Foata normal form. 2/2275 useless extension candidates. Maximal degree in co-relation 13649. Up to 2123 conditions per place. [2024-06-20 17:21:05,869 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 127 selfloop transitions, 29 changer transitions 0/161 dead transitions. [2024-06-20 17:21:05,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 161 transitions, 1572 flow [2024-06-20 17:21:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 17:21:05,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:21:05,871 INFO L175 Difference]: Start difference. First operand has 108 places, 124 transitions, 1062 flow. Second operand 8 states and 152 transitions. [2024-06-20 17:21:05,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 161 transitions, 1572 flow [2024-06-20 17:21:05,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 161 transitions, 1497 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 17:21:05,895 INFO L231 Difference]: Finished difference. Result has 115 places, 133 transitions, 1199 flow [2024-06-20 17:21:05,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1199, PETRI_PLACES=115, PETRI_TRANSITIONS=133} [2024-06-20 17:21:05,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-20 17:21:05,895 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 133 transitions, 1199 flow [2024-06-20 17:21:05,895 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) [2024-06-20 17:21:05,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:05,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:05,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:21:05,896 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:05,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:05,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1013047903, now seen corresponding path program 1 times [2024-06-20 17:21:05,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:05,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642950074] [2024-06-20 17:21:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:05,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:06,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:06,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642950074] [2024-06-20 17:21:06,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642950074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:06,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:06,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:06,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693810754] [2024-06-20 17:21:06,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:06,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:06,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:06,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:06,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:07,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:07,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 133 transitions, 1199 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:07,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:07,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:07,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:07,619 INFO L124 PetriNetUnfolderBase]: 1570/2423 cut-off events. [2024-06-20 17:21:07,619 INFO L125 PetriNetUnfolderBase]: For 45841/45841 co-relation queries the response was YES. [2024-06-20 17:21:07,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14988 conditions, 2423 events. 1570/2423 cut-off events. For 45841/45841 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11971 event pairs, 466 based on Foata normal form. 24/2444 useless extension candidates. Maximal degree in co-relation 14932. Up to 2135 conditions per place. [2024-06-20 17:21:07,637 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 143 selfloop transitions, 23 changer transitions 0/171 dead transitions. [2024-06-20 17:21:07,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1723 flow [2024-06-20 17:21:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 17:21:07,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-20 17:21:07,638 INFO L175 Difference]: Start difference. First operand has 115 places, 133 transitions, 1199 flow. Second operand 9 states and 173 transitions. [2024-06-20 17:21:07,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1723 flow [2024-06-20 17:21:07,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 171 transitions, 1624 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-20 17:21:07,672 INFO L231 Difference]: Finished difference. Result has 121 places, 135 transitions, 1193 flow [2024-06-20 17:21:07,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1193, PETRI_PLACES=121, PETRI_TRANSITIONS=135} [2024-06-20 17:21:07,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-20 17:21:07,672 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 135 transitions, 1193 flow [2024-06-20 17:21:07,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:07,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:07,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:07,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:21:07,673 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:07,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:07,673 INFO L85 PathProgramCache]: Analyzing trace with hash 879708119, now seen corresponding path program 2 times [2024-06-20 17:21:07,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:07,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010499854] [2024-06-20 17:21:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:07,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:08,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:08,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010499854] [2024-06-20 17:21:08,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010499854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:08,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:08,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:08,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056279131] [2024-06-20 17:21:08,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:08,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:08,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:08,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:08,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:08,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 135 transitions, 1193 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:08,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:08,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:08,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:09,225 INFO L124 PetriNetUnfolderBase]: 1587/2462 cut-off events. [2024-06-20 17:21:09,225 INFO L125 PetriNetUnfolderBase]: For 42082/42082 co-relation queries the response was YES. [2024-06-20 17:21:09,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15099 conditions, 2462 events. 1587/2462 cut-off events. For 42082/42082 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12306 event pairs, 471 based on Foata normal form. 4/2457 useless extension candidates. Maximal degree in co-relation 15041. Up to 2233 conditions per place. [2024-06-20 17:21:09,243 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 135 selfloop transitions, 43 changer transitions 0/183 dead transitions. [2024-06-20 17:21:09,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 183 transitions, 1827 flow [2024-06-20 17:21:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:09,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:21:09,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 17:21:09,244 INFO L175 Difference]: Start difference. First operand has 121 places, 135 transitions, 1193 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:21:09,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 183 transitions, 1827 flow [2024-06-20 17:21:09,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 183 transitions, 1765 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:09,273 INFO L231 Difference]: Finished difference. Result has 126 places, 155 transitions, 1492 flow [2024-06-20 17:21:09,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1492, PETRI_PLACES=126, PETRI_TRANSITIONS=155} [2024-06-20 17:21:09,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-20 17:21:09,274 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 155 transitions, 1492 flow [2024-06-20 17:21:09,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:09,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:09,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:09,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:21:09,275 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:09,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:09,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2022944161, now seen corresponding path program 3 times [2024-06-20 17:21:09,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:09,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625223868] [2024-06-20 17:21:09,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:09,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:10,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:10,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625223868] [2024-06-20 17:21:10,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625223868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:10,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:10,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:10,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657885270] [2024-06-20 17:21:10,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:10,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:10,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:10,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:10,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:10,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:10,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 155 transitions, 1492 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:10,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:10,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:10,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:10,743 INFO L124 PetriNetUnfolderBase]: 1604/2484 cut-off events. [2024-06-20 17:21:10,743 INFO L125 PetriNetUnfolderBase]: For 46942/46942 co-relation queries the response was YES. [2024-06-20 17:21:10,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15770 conditions, 2484 events. 1604/2484 cut-off events. For 46942/46942 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12405 event pairs, 436 based on Foata normal form. 4/2479 useless extension candidates. Maximal degree in co-relation 15708. Up to 2172 conditions per place. [2024-06-20 17:21:10,759 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 136 selfloop transitions, 50 changer transitions 0/191 dead transitions. [2024-06-20 17:21:10,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 191 transitions, 2120 flow [2024-06-20 17:21:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:21:10,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 17:21:10,770 INFO L175 Difference]: Start difference. First operand has 126 places, 155 transitions, 1492 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:21:10,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 191 transitions, 2120 flow [2024-06-20 17:21:10,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 191 transitions, 2039 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-20 17:21:10,803 INFO L231 Difference]: Finished difference. Result has 133 places, 160 transitions, 1623 flow [2024-06-20 17:21:10,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1623, PETRI_PLACES=133, PETRI_TRANSITIONS=160} [2024-06-20 17:21:10,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-20 17:21:10,803 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 160 transitions, 1623 flow [2024-06-20 17:21:10,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:10,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:10,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:10,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:21:10,804 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:10,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1756920451, now seen corresponding path program 4 times [2024-06-20 17:21:10,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:10,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080304595] [2024-06-20 17:21:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:10,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:11,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:11,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080304595] [2024-06-20 17:21:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080304595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:11,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:11,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:11,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369113449] [2024-06-20 17:21:11,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:11,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:11,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:11,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:11,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 160 transitions, 1623 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:11,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:11,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:11,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:12,536 INFO L124 PetriNetUnfolderBase]: 1696/2641 cut-off events. [2024-06-20 17:21:12,536 INFO L125 PetriNetUnfolderBase]: For 56011/56011 co-relation queries the response was YES. [2024-06-20 17:21:12,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16999 conditions, 2641 events. 1696/2641 cut-off events. For 56011/56011 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13421 event pairs, 481 based on Foata normal form. 24/2656 useless extension candidates. Maximal degree in co-relation 16934. Up to 2264 conditions per place. [2024-06-20 17:21:12,557 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 146 selfloop transitions, 47 changer transitions 0/198 dead transitions. [2024-06-20 17:21:12,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 198 transitions, 2222 flow [2024-06-20 17:21:12,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:12,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:12,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 17:21:12,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-20 17:21:12,559 INFO L175 Difference]: Start difference. First operand has 133 places, 160 transitions, 1623 flow. Second operand 9 states and 175 transitions. [2024-06-20 17:21:12,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 198 transitions, 2222 flow [2024-06-20 17:21:12,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 198 transitions, 2108 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:12,612 INFO L231 Difference]: Finished difference. Result has 137 places, 163 transitions, 1687 flow [2024-06-20 17:21:12,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1687, PETRI_PLACES=137, PETRI_TRANSITIONS=163} [2024-06-20 17:21:12,613 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-20 17:21:12,613 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 163 transitions, 1687 flow [2024-06-20 17:21:12,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:12,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:12,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:12,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:21:12,614 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:12,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:12,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2013420961, now seen corresponding path program 5 times [2024-06-20 17:21:12,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:12,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135021970] [2024-06-20 17:21:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:12,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:13,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:13,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135021970] [2024-06-20 17:21:13,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135021970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:13,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:13,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:13,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253447250] [2024-06-20 17:21:13,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:13,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:13,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:13,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:13,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:13,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:13,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 163 transitions, 1687 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:13,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:13,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:13,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:14,279 INFO L124 PetriNetUnfolderBase]: 1763/2749 cut-off events. [2024-06-20 17:21:14,279 INFO L125 PetriNetUnfolderBase]: For 59449/59449 co-relation queries the response was YES. [2024-06-20 17:21:14,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17637 conditions, 2749 events. 1763/2749 cut-off events. For 59449/59449 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14113 event pairs, 499 based on Foata normal form. 24/2764 useless extension candidates. Maximal degree in co-relation 17570. Up to 2377 conditions per place. [2024-06-20 17:21:14,300 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 143 selfloop transitions, 49 changer transitions 0/197 dead transitions. [2024-06-20 17:21:14,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 197 transitions, 2229 flow [2024-06-20 17:21:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 17:21:14,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 17:21:14,301 INFO L175 Difference]: Start difference. First operand has 137 places, 163 transitions, 1687 flow. Second operand 9 states and 174 transitions. [2024-06-20 17:21:14,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 197 transitions, 2229 flow [2024-06-20 17:21:14,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 197 transitions, 2090 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:14,353 INFO L231 Difference]: Finished difference. Result has 139 places, 164 transitions, 1683 flow [2024-06-20 17:21:14,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1683, PETRI_PLACES=139, PETRI_TRANSITIONS=164} [2024-06-20 17:21:14,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-20 17:21:14,354 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 164 transitions, 1683 flow [2024-06-20 17:21:14,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:14,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:14,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:14,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:21:14,355 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:14,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:14,355 INFO L85 PathProgramCache]: Analyzing trace with hash -10392617, now seen corresponding path program 1 times [2024-06-20 17:21:14,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:14,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125512531] [2024-06-20 17:21:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:14,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:15,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:15,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125512531] [2024-06-20 17:21:15,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125512531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:15,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:15,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:15,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770629363] [2024-06-20 17:21:15,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:15,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:15,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:15,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:15,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:15,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:21:15,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 164 transitions, 1683 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:15,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:15,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:21:15,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:15,792 INFO L124 PetriNetUnfolderBase]: 1704/2698 cut-off events. [2024-06-20 17:21:15,792 INFO L125 PetriNetUnfolderBase]: For 59651/59701 co-relation queries the response was YES. [2024-06-20 17:21:15,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17264 conditions, 2698 events. 1704/2698 cut-off events. For 59651/59701 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14273 event pairs, 323 based on Foata normal form. 10/2671 useless extension candidates. Maximal degree in co-relation 17196. Up to 2376 conditions per place. [2024-06-20 17:21:15,813 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 127 selfloop transitions, 25 changer transitions 0/196 dead transitions. [2024-06-20 17:21:15,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 196 transitions, 2099 flow [2024-06-20 17:21:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 17:21:15,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-20 17:21:15,814 INFO L175 Difference]: Start difference. First operand has 139 places, 164 transitions, 1683 flow. Second operand 8 states and 159 transitions. [2024-06-20 17:21:15,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 196 transitions, 2099 flow [2024-06-20 17:21:15,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 196 transitions, 1954 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 17:21:15,874 INFO L231 Difference]: Finished difference. Result has 139 places, 166 transitions, 1621 flow [2024-06-20 17:21:15,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1621, PETRI_PLACES=139, PETRI_TRANSITIONS=166} [2024-06-20 17:21:15,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-20 17:21:15,875 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 166 transitions, 1621 flow [2024-06-20 17:21:15,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:15,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:15,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:15,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:21:15,875 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)] === [2024-06-20 17:21:15,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:15,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1905061417, now seen corresponding path program 2 times [2024-06-20 17:21:15,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:15,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002620689] [2024-06-20 17:21:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:15,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:16,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:16,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002620689] [2024-06-20 17:21:16,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002620689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:16,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:16,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:16,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501332079] [2024-06-20 17:21:16,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:16,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:16,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:16,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:16,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:16,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:21:16,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 166 transitions, 1621 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:16,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:16,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:21:16,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:17,367 INFO L124 PetriNetUnfolderBase]: 1717/2723 cut-off events. [2024-06-20 17:21:17,368 INFO L125 PetriNetUnfolderBase]: For 63643/63686 co-relation queries the response was YES. [2024-06-20 17:21:17,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17454 conditions, 2723 events. 1717/2723 cut-off events. For 63643/63686 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14525 event pairs, 420 based on Foata normal form. 8/2692 useless extension candidates. Maximal degree in co-relation 17386. Up to 2419 conditions per place. [2024-06-20 17:21:17,389 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 123 selfloop transitions, 30 changer transitions 0/197 dead transitions. [2024-06-20 17:21:17,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 197 transitions, 2041 flow [2024-06-20 17:21:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 17:21:17,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-20 17:21:17,390 INFO L175 Difference]: Start difference. First operand has 139 places, 166 transitions, 1621 flow. Second operand 8 states and 159 transitions. [2024-06-20 17:21:17,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 197 transitions, 2041 flow [2024-06-20 17:21:17,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 197 transitions, 1976 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:17,446 INFO L231 Difference]: Finished difference. Result has 141 places, 168 transitions, 1655 flow [2024-06-20 17:21:17,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1655, PETRI_PLACES=141, PETRI_TRANSITIONS=168} [2024-06-20 17:21:17,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-20 17:21:17,447 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 168 transitions, 1655 flow [2024-06-20 17:21:17,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:17,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:17,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:17,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:21:17,448 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:17,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:17,449 INFO L85 PathProgramCache]: Analyzing trace with hash 912825875, now seen corresponding path program 1 times [2024-06-20 17:21:17,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:17,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072990566] [2024-06-20 17:21:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:17,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:18,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:18,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072990566] [2024-06-20 17:21:18,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072990566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:18,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:18,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:18,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058839520] [2024-06-20 17:21:18,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:18,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:18,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:18,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:18,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:18,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:18,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 168 transitions, 1655 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:18,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:18,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:18,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:19,133 INFO L124 PetriNetUnfolderBase]: 1824/2851 cut-off events. [2024-06-20 17:21:19,134 INFO L125 PetriNetUnfolderBase]: For 66122/66122 co-relation queries the response was YES. [2024-06-20 17:21:19,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18511 conditions, 2851 events. 1824/2851 cut-off events. For 66122/66122 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14831 event pairs, 438 based on Foata normal form. 2/2850 useless extension candidates. Maximal degree in co-relation 18442. Up to 2674 conditions per place. [2024-06-20 17:21:19,156 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 166 selfloop transitions, 32 changer transitions 0/203 dead transitions. [2024-06-20 17:21:19,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 203 transitions, 2207 flow [2024-06-20 17:21:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:21:19,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 17:21:19,157 INFO L175 Difference]: Start difference. First operand has 141 places, 168 transitions, 1655 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:21:19,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 203 transitions, 2207 flow [2024-06-20 17:21:19,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 203 transitions, 2130 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:19,213 INFO L231 Difference]: Finished difference. Result has 144 places, 171 transitions, 1715 flow [2024-06-20 17:21:19,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1715, PETRI_PLACES=144, PETRI_TRANSITIONS=171} [2024-06-20 17:21:19,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-20 17:21:19,213 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 171 transitions, 1715 flow [2024-06-20 17:21:19,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:19,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:19,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:19,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:21:19,214 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:19,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:19,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1193751219, now seen corresponding path program 3 times [2024-06-20 17:21:19,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:19,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732492558] [2024-06-20 17:21:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:19,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:20,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:20,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732492558] [2024-06-20 17:21:20,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732492558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:20,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:20,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:20,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532045634] [2024-06-20 17:21:20,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:20,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:20,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:20,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:20,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:20,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:21:20,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 171 transitions, 1715 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:20,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:20,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:21:20,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:20,777 INFO L124 PetriNetUnfolderBase]: 1745/2778 cut-off events. [2024-06-20 17:21:20,777 INFO L125 PetriNetUnfolderBase]: For 74917/74964 co-relation queries the response was YES. [2024-06-20 17:21:20,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18491 conditions, 2778 events. 1745/2778 cut-off events. For 74917/74964 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14888 event pairs, 402 based on Foata normal form. 8/2745 useless extension candidates. Maximal degree in co-relation 18421. Up to 2486 conditions per place. [2024-06-20 17:21:20,801 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 132 selfloop transitions, 26 changer transitions 0/203 dead transitions. [2024-06-20 17:21:20,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 203 transitions, 2176 flow [2024-06-20 17:21:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 17:21:20,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 17:21:20,804 INFO L175 Difference]: Start difference. First operand has 144 places, 171 transitions, 1715 flow. Second operand 8 states and 156 transitions. [2024-06-20 17:21:20,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 203 transitions, 2176 flow [2024-06-20 17:21:20,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 203 transitions, 2065 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:20,870 INFO L231 Difference]: Finished difference. Result has 146 places, 177 transitions, 1747 flow [2024-06-20 17:21:20,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1604, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1747, PETRI_PLACES=146, PETRI_TRANSITIONS=177} [2024-06-20 17:21:20,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-20 17:21:20,871 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 177 transitions, 1747 flow [2024-06-20 17:21:20,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:20,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:20,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:20,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:21:20,872 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:20,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:20,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1200422419, now seen corresponding path program 2 times [2024-06-20 17:21:20,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:20,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439902645] [2024-06-20 17:21:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:20,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:21,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:21,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439902645] [2024-06-20 17:21:21,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439902645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:21,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:21,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:21,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961154862] [2024-06-20 17:21:21,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:21,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:21,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:21,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:21,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:21,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:21,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 177 transitions, 1747 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:21,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:21,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:21,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:22,613 INFO L124 PetriNetUnfolderBase]: 1860/2914 cut-off events. [2024-06-20 17:21:22,613 INFO L125 PetriNetUnfolderBase]: For 78040/78040 co-relation queries the response was YES. [2024-06-20 17:21:22,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19643 conditions, 2914 events. 1860/2914 cut-off events. For 78040/78040 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15304 event pairs, 444 based on Foata normal form. 2/2913 useless extension candidates. Maximal degree in co-relation 19571. Up to 2656 conditions per place. [2024-06-20 17:21:22,635 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 157 selfloop transitions, 49 changer transitions 0/211 dead transitions. [2024-06-20 17:21:22,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 211 transitions, 2320 flow [2024-06-20 17:21:22,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:21:22,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 17:21:22,637 INFO L175 Difference]: Start difference. First operand has 146 places, 177 transitions, 1747 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:21:22,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 211 transitions, 2320 flow [2024-06-20 17:21:22,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 211 transitions, 2238 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:22,704 INFO L231 Difference]: Finished difference. Result has 150 places, 180 transitions, 1841 flow [2024-06-20 17:21:22,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1841, PETRI_PLACES=150, PETRI_TRANSITIONS=180} [2024-06-20 17:21:22,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-20 17:21:22,704 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 180 transitions, 1841 flow [2024-06-20 17:21:22,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:22,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:22,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:22,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:21:22,705 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:22,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:22,705 INFO L85 PathProgramCache]: Analyzing trace with hash 334083131, now seen corresponding path program 1 times [2024-06-20 17:21:22,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:22,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204070068] [2024-06-20 17:21:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:22,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:23,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:23,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204070068] [2024-06-20 17:21:23,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204070068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:23,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:23,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:21:23,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318013196] [2024-06-20 17:21:23,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:23,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:21:23,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:23,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:21:23,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:21:23,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:23,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 180 transitions, 1841 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) [2024-06-20 17:21:23,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:23,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:23,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:24,095 INFO L124 PetriNetUnfolderBase]: 1890/2964 cut-off events. [2024-06-20 17:21:24,096 INFO L125 PetriNetUnfolderBase]: For 84937/84937 co-relation queries the response was YES. [2024-06-20 17:21:24,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20375 conditions, 2964 events. 1890/2964 cut-off events. For 84937/84937 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15630 event pairs, 449 based on Foata normal form. 4/2965 useless extension candidates. Maximal degree in co-relation 20302. Up to 2750 conditions per place. [2024-06-20 17:21:24,119 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 173 selfloop transitions, 35 changer transitions 0/213 dead transitions. [2024-06-20 17:21:24,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 213 transitions, 2538 flow [2024-06-20 17:21:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:21:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:21:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 17:21:24,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-20 17:21:24,120 INFO L175 Difference]: Start difference. First operand has 150 places, 180 transitions, 1841 flow. Second operand 7 states and 136 transitions. [2024-06-20 17:21:24,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 213 transitions, 2538 flow [2024-06-20 17:21:24,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 213 transitions, 2386 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:24,191 INFO L231 Difference]: Finished difference. Result has 151 places, 191 transitions, 1908 flow [2024-06-20 17:21:24,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1908, PETRI_PLACES=151, PETRI_TRANSITIONS=191} [2024-06-20 17:21:24,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-20 17:21:24,192 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 191 transitions, 1908 flow [2024-06-20 17:21:24,192 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) [2024-06-20 17:21:24,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:24,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:24,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:21:24,193 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)] === [2024-06-20 17:21:24,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1376720205, now seen corresponding path program 4 times [2024-06-20 17:21:24,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:24,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151412927] [2024-06-20 17:21:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:24,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:25,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:25,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151412927] [2024-06-20 17:21:25,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151412927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:25,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:25,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:25,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704022994] [2024-06-20 17:21:25,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:25,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:25,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:25,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:25,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:25,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:21:25,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 191 transitions, 1908 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:25,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:25,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:21:25,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:25,783 INFO L124 PetriNetUnfolderBase]: 1774/2822 cut-off events. [2024-06-20 17:21:25,784 INFO L125 PetriNetUnfolderBase]: For 91273/91324 co-relation queries the response was YES. [2024-06-20 17:21:25,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19683 conditions, 2822 events. 1774/2822 cut-off events. For 91273/91324 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15223 event pairs, 401 based on Foata normal form. 8/2783 useless extension candidates. Maximal degree in co-relation 19608. Up to 2490 conditions per place. [2024-06-20 17:21:25,807 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 135 selfloop transitions, 39 changer transitions 0/220 dead transitions. [2024-06-20 17:21:25,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 220 transitions, 2392 flow [2024-06-20 17:21:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 17:21:25,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 17:21:25,809 INFO L175 Difference]: Start difference. First operand has 151 places, 191 transitions, 1908 flow. Second operand 8 states and 156 transitions. [2024-06-20 17:21:25,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 220 transitions, 2392 flow [2024-06-20 17:21:25,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 220 transitions, 2348 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-20 17:21:25,880 INFO L231 Difference]: Finished difference. Result has 158 places, 196 transitions, 2027 flow [2024-06-20 17:21:25,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2027, PETRI_PLACES=158, PETRI_TRANSITIONS=196} [2024-06-20 17:21:25,880 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-20 17:21:25,880 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 196 transitions, 2027 flow [2024-06-20 17:21:25,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:25,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:25,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:25,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:21:25,881 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:25,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:25,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1370049005, now seen corresponding path program 3 times [2024-06-20 17:21:25,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:25,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757569857] [2024-06-20 17:21:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:25,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:26,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:26,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757569857] [2024-06-20 17:21:26,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757569857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:26,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:26,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:26,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224445209] [2024-06-20 17:21:26,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:26,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:26,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:26,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:26,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:27,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:27,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 196 transitions, 2027 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:27,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:27,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:27,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:27,714 INFO L124 PetriNetUnfolderBase]: 1888/2955 cut-off events. [2024-06-20 17:21:27,715 INFO L125 PetriNetUnfolderBase]: For 93586/93586 co-relation queries the response was YES. [2024-06-20 17:21:27,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20965 conditions, 2955 events. 1888/2955 cut-off events. For 93586/93586 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15596 event pairs, 449 based on Foata normal form. 2/2944 useless extension candidates. Maximal degree in co-relation 20887. Up to 2632 conditions per place. [2024-06-20 17:21:27,739 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 162 selfloop transitions, 61 changer transitions 0/228 dead transitions. [2024-06-20 17:21:27,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 228 transitions, 2637 flow [2024-06-20 17:21:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 17:21:27,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-20 17:21:27,740 INFO L175 Difference]: Start difference. First operand has 158 places, 196 transitions, 2027 flow. Second operand 9 states and 172 transitions. [2024-06-20 17:21:27,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 228 transitions, 2637 flow [2024-06-20 17:21:27,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 228 transitions, 2521 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:27,823 INFO L231 Difference]: Finished difference. Result has 162 places, 199 transitions, 2119 flow [2024-06-20 17:21:27,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2119, PETRI_PLACES=162, PETRI_TRANSITIONS=199} [2024-06-20 17:21:27,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-20 17:21:27,824 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 199 transitions, 2119 flow [2024-06-20 17:21:27,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:27,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:27,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:27,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:21:27,825 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:27,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:27,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2008467787, now seen corresponding path program 4 times [2024-06-20 17:21:27,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:27,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569197918] [2024-06-20 17:21:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:27,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:28,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:28,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569197918] [2024-06-20 17:21:28,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569197918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:28,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:28,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:28,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014632367] [2024-06-20 17:21:28,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:28,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:28,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:28,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:28,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:28,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:28,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 199 transitions, 2119 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:28,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:28,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:28,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:29,604 INFO L124 PetriNetUnfolderBase]: 1899/2980 cut-off events. [2024-06-20 17:21:29,604 INFO L125 PetriNetUnfolderBase]: For 100884/100884 co-relation queries the response was YES. [2024-06-20 17:21:29,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21580 conditions, 2980 events. 1899/2980 cut-off events. For 100884/100884 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15839 event pairs, 453 based on Foata normal form. 2/2969 useless extension candidates. Maximal degree in co-relation 21501. Up to 2648 conditions per place. [2024-06-20 17:21:29,629 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 160 selfloop transitions, 65 changer transitions 0/230 dead transitions. [2024-06-20 17:21:29,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 230 transitions, 2734 flow [2024-06-20 17:21:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:29,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 17:21:29,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:21:29,630 INFO L175 Difference]: Start difference. First operand has 162 places, 199 transitions, 2119 flow. Second operand 9 states and 171 transitions. [2024-06-20 17:21:29,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 230 transitions, 2734 flow [2024-06-20 17:21:29,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 230 transitions, 2550 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:29,757 INFO L231 Difference]: Finished difference. Result has 164 places, 202 transitions, 2157 flow [2024-06-20 17:21:29,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2157, PETRI_PLACES=164, PETRI_TRANSITIONS=202} [2024-06-20 17:21:29,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-20 17:21:29,758 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 202 transitions, 2157 flow [2024-06-20 17:21:29,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:29,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:29,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:29,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:21:29,759 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:29,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:29,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1166255739, now seen corresponding path program 5 times [2024-06-20 17:21:29,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:29,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258027091] [2024-06-20 17:21:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:29,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:30,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:30,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258027091] [2024-06-20 17:21:30,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258027091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:30,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:30,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:30,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930549891] [2024-06-20 17:21:30,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:30,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:30,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:30,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:30,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:30,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 202 transitions, 2157 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:30,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:30,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:30,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:31,632 INFO L124 PetriNetUnfolderBase]: 1894/2973 cut-off events. [2024-06-20 17:21:31,632 INFO L125 PetriNetUnfolderBase]: For 107978/107978 co-relation queries the response was YES. [2024-06-20 17:21:31,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21823 conditions, 2973 events. 1894/2973 cut-off events. For 107978/107978 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15805 event pairs, 458 based on Foata normal form. 2/2962 useless extension candidates. Maximal degree in co-relation 21743. Up to 2546 conditions per place. [2024-06-20 17:21:31,661 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 142 selfloop transitions, 94 changer transitions 0/241 dead transitions. [2024-06-20 17:21:31,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 241 transitions, 2824 flow [2024-06-20 17:21:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:21:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:21:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-20 17:21:31,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567627494456763 [2024-06-20 17:21:31,663 INFO L175 Difference]: Start difference. First operand has 164 places, 202 transitions, 2157 flow. Second operand 11 states and 206 transitions. [2024-06-20 17:21:31,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 241 transitions, 2824 flow [2024-06-20 17:21:31,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 241 transitions, 2626 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:31,771 INFO L231 Difference]: Finished difference. Result has 169 places, 206 transitions, 2260 flow [2024-06-20 17:21:31,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1959, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2260, PETRI_PLACES=169, PETRI_TRANSITIONS=206} [2024-06-20 17:21:31,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-20 17:21:31,772 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 206 transitions, 2260 flow [2024-06-20 17:21:31,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:31,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:31,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:31,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:21:31,772 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:31,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:31,773 INFO L85 PathProgramCache]: Analyzing trace with hash 837334803, now seen corresponding path program 2 times [2024-06-20 17:21:31,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:31,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918235387] [2024-06-20 17:21:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:31,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:32,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:32,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918235387] [2024-06-20 17:21:32,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918235387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:32,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:32,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:21:32,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174068181] [2024-06-20 17:21:32,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:32,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:21:32,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:32,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:21:32,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:21:32,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:32,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 206 transitions, 2260 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) [2024-06-20 17:21:32,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:32,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:32,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:33,055 INFO L124 PetriNetUnfolderBase]: 1914/3008 cut-off events. [2024-06-20 17:21:33,055 INFO L125 PetriNetUnfolderBase]: For 116303/116303 co-relation queries the response was YES. [2024-06-20 17:21:33,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22503 conditions, 3008 events. 1914/3008 cut-off events. For 116303/116303 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16077 event pairs, 447 based on Foata normal form. 4/3009 useless extension candidates. Maximal degree in co-relation 22421. Up to 2812 conditions per place. [2024-06-20 17:21:33,082 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 190 selfloop transitions, 30 changer transitions 0/225 dead transitions. [2024-06-20 17:21:33,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 225 transitions, 2814 flow [2024-06-20 17:21:33,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:21:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:21:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-20 17:21:33,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-20 17:21:33,083 INFO L175 Difference]: Start difference. First operand has 169 places, 206 transitions, 2260 flow. Second operand 5 states and 104 transitions. [2024-06-20 17:21:33,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 225 transitions, 2814 flow [2024-06-20 17:21:33,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 225 transitions, 2550 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-20 17:21:33,193 INFO L231 Difference]: Finished difference. Result has 166 places, 209 transitions, 2133 flow [2024-06-20 17:21:33,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2133, PETRI_PLACES=166, PETRI_TRANSITIONS=209} [2024-06-20 17:21:33,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-20 17:21:33,194 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 209 transitions, 2133 flow [2024-06-20 17:21:33,194 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) [2024-06-20 17:21:33,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:33,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:33,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:21:33,194 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)] === [2024-06-20 17:21:33,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:33,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1541386649, now seen corresponding path program 3 times [2024-06-20 17:21:33,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:33,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763885385] [2024-06-20 17:21:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:33,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:33,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:33,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763885385] [2024-06-20 17:21:33,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763885385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:33,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:33,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:21:33,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893478090] [2024-06-20 17:21:33,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:33,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:21:33,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:33,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:21:33,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:21:33,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:33,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 209 transitions, 2133 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) [2024-06-20 17:21:33,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:33,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:33,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:34,504 INFO L124 PetriNetUnfolderBase]: 1902/2996 cut-off events. [2024-06-20 17:21:34,504 INFO L125 PetriNetUnfolderBase]: For 110336/110336 co-relation queries the response was YES. [2024-06-20 17:21:34,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21669 conditions, 2996 events. 1902/2996 cut-off events. For 110336/110336 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15977 event pairs, 438 based on Foata normal form. 4/2997 useless extension candidates. Maximal degree in co-relation 21586. Up to 2764 conditions per place. [2024-06-20 17:21:34,530 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 187 selfloop transitions, 36 changer transitions 0/228 dead transitions. [2024-06-20 17:21:34,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 228 transitions, 2673 flow [2024-06-20 17:21:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:21:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:21:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-20 17:21:34,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:21:34,532 INFO L175 Difference]: Start difference. First operand has 166 places, 209 transitions, 2133 flow. Second operand 6 states and 120 transitions. [2024-06-20 17:21:34,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 228 transitions, 2673 flow [2024-06-20 17:21:34,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 228 transitions, 2592 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 17:21:34,632 INFO L231 Difference]: Finished difference. Result has 169 places, 209 transitions, 2136 flow [2024-06-20 17:21:34,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2052, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2136, PETRI_PLACES=169, PETRI_TRANSITIONS=209} [2024-06-20 17:21:34,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-20 17:21:34,633 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 209 transitions, 2136 flow [2024-06-20 17:21:34,633 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) [2024-06-20 17:21:34,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:34,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:34,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:21:34,633 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)] === [2024-06-20 17:21:34,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1751464301, now seen corresponding path program 1 times [2024-06-20 17:21:34,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:34,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248916960] [2024-06-20 17:21:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:34,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:35,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:35,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248916960] [2024-06-20 17:21:35,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248916960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:35,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:35,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:21:35,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010803621] [2024-06-20 17:21:35,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:35,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:21:35,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:35,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:21:35,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:21:35,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:21:35,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 209 transitions, 2136 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-20 17:21:35,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:35,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:21:35,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:35,881 INFO L124 PetriNetUnfolderBase]: 1861/2963 cut-off events. [2024-06-20 17:21:35,881 INFO L125 PetriNetUnfolderBase]: For 115235/115307 co-relation queries the response was YES. [2024-06-20 17:21:35,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21685 conditions, 2963 events. 1861/2963 cut-off events. For 115235/115307 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15972 event pairs, 414 based on Foata normal form. 3/2954 useless extension candidates. Maximal degree in co-relation 21601. Up to 2709 conditions per place. [2024-06-20 17:21:35,910 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 188 selfloop transitions, 25 changer transitions 0/235 dead transitions. [2024-06-20 17:21:35,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 235 transitions, 2752 flow [2024-06-20 17:21:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:21:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:21:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-20 17:21:35,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-20 17:21:35,912 INFO L175 Difference]: Start difference. First operand has 169 places, 209 transitions, 2136 flow. Second operand 7 states and 138 transitions. [2024-06-20 17:21:35,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 235 transitions, 2752 flow [2024-06-20 17:21:36,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 235 transitions, 2669 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:36,020 INFO L231 Difference]: Finished difference. Result has 171 places, 215 transitions, 2177 flow [2024-06-20 17:21:36,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2177, PETRI_PLACES=171, PETRI_TRANSITIONS=215} [2024-06-20 17:21:36,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-20 17:21:36,020 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 215 transitions, 2177 flow [2024-06-20 17:21:36,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-20 17:21:36,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:36,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:36,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:21:36,021 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:36,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:36,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1751344331, now seen corresponding path program 2 times [2024-06-20 17:21:36,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:36,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816947902] [2024-06-20 17:21:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:36,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:36,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:36,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816947902] [2024-06-20 17:21:36,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816947902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:36,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:36,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:21:36,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257391720] [2024-06-20 17:21:36,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:36,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:21:36,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:36,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:21:36,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:21:36,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:21:36,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 215 transitions, 2177 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-20 17:21:36,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:36,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:21:36,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:37,319 INFO L124 PetriNetUnfolderBase]: 1891/3005 cut-off events. [2024-06-20 17:21:37,319 INFO L125 PetriNetUnfolderBase]: For 118229/118301 co-relation queries the response was YES. [2024-06-20 17:21:37,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22095 conditions, 3005 events. 1891/3005 cut-off events. For 118229/118301 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16268 event pairs, 415 based on Foata normal form. 3/2996 useless extension candidates. Maximal degree in co-relation 22011. Up to 2761 conditions per place. [2024-06-20 17:21:37,351 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 192 selfloop transitions, 25 changer transitions 0/239 dead transitions. [2024-06-20 17:21:37,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 239 transitions, 2743 flow [2024-06-20 17:21:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:21:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:21:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 17:21:37,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:21:37,352 INFO L175 Difference]: Start difference. First operand has 171 places, 215 transitions, 2177 flow. Second operand 7 states and 133 transitions. [2024-06-20 17:21:37,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 239 transitions, 2743 flow [2024-06-20 17:21:37,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 239 transitions, 2690 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 17:21:37,514 INFO L231 Difference]: Finished difference. Result has 175 places, 223 transitions, 2269 flow [2024-06-20 17:21:37,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2269, PETRI_PLACES=175, PETRI_TRANSITIONS=223} [2024-06-20 17:21:37,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-20 17:21:37,515 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 223 transitions, 2269 flow [2024-06-20 17:21:37,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-20 17:21:37,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:37,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:37,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:21:37,515 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:37,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1316882269, now seen corresponding path program 3 times [2024-06-20 17:21:37,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:37,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220075595] [2024-06-20 17:21:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:37,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:38,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:38,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220075595] [2024-06-20 17:21:38,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220075595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:38,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:38,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:21:38,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431078536] [2024-06-20 17:21:38,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:38,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:21:38,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:38,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:21:38,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:21:38,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:21:38,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 223 transitions, 2269 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-20 17:21:38,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:38,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:21:38,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:38,801 INFO L124 PetriNetUnfolderBase]: 1882/2993 cut-off events. [2024-06-20 17:21:38,801 INFO L125 PetriNetUnfolderBase]: For 119273/119345 co-relation queries the response was YES. [2024-06-20 17:21:38,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22122 conditions, 2993 events. 1882/2993 cut-off events. For 119273/119345 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16130 event pairs, 416 based on Foata normal form. 3/2984 useless extension candidates. Maximal degree in co-relation 22036. Up to 2747 conditions per place. [2024-06-20 17:21:38,825 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 195 selfloop transitions, 23 changer transitions 0/240 dead transitions. [2024-06-20 17:21:38,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 240 transitions, 2759 flow [2024-06-20 17:21:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:21:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:21:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-20 17:21:38,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-20 17:21:38,826 INFO L175 Difference]: Start difference. First operand has 175 places, 223 transitions, 2269 flow. Second operand 6 states and 121 transitions. [2024-06-20 17:21:38,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 240 transitions, 2759 flow [2024-06-20 17:21:38,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 240 transitions, 2674 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 17:21:38,937 INFO L231 Difference]: Finished difference. Result has 177 places, 223 transitions, 2241 flow [2024-06-20 17:21:38,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2184, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2241, PETRI_PLACES=177, PETRI_TRANSITIONS=223} [2024-06-20 17:21:38,938 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-20 17:21:38,938 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 223 transitions, 2241 flow [2024-06-20 17:21:38,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-20 17:21:38,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:38,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:38,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:21:38,938 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:38,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:38,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1349302813, now seen corresponding path program 1 times [2024-06-20 17:21:38,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:38,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729606474] [2024-06-20 17:21:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:38,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:39,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:39,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729606474] [2024-06-20 17:21:39,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729606474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:39,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:39,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:21:39,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798223934] [2024-06-20 17:21:39,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:39,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:21:39,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:39,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:21:39,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:21:39,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:39,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 223 transitions, 2241 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) [2024-06-20 17:21:39,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:39,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:39,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:40,406 INFO L124 PetriNetUnfolderBase]: 1941/3047 cut-off events. [2024-06-20 17:21:40,406 INFO L125 PetriNetUnfolderBase]: For 119295/119295 co-relation queries the response was YES. [2024-06-20 17:21:40,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22401 conditions, 3047 events. 1941/3047 cut-off events. For 119295/119295 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16108 event pairs, 445 based on Foata normal form. 2/3046 useless extension candidates. Maximal degree in co-relation 22314. Up to 2925 conditions per place. [2024-06-20 17:21:40,439 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 216 selfloop transitions, 13 changer transitions 0/234 dead transitions. [2024-06-20 17:21:40,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 234 transitions, 2749 flow [2024-06-20 17:21:40,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:21:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:21:40,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-20 17:21:40,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-20 17:21:40,440 INFO L175 Difference]: Start difference. First operand has 177 places, 223 transitions, 2241 flow. Second operand 5 states and 94 transitions. [2024-06-20 17:21:40,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 234 transitions, 2749 flow [2024-06-20 17:21:40,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 234 transitions, 2692 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:40,579 INFO L231 Difference]: Finished difference. Result has 177 places, 225 transitions, 2243 flow [2024-06-20 17:21:40,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2184, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2243, PETRI_PLACES=177, PETRI_TRANSITIONS=225} [2024-06-20 17:21:40,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-20 17:21:40,580 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 225 transitions, 2243 flow [2024-06-20 17:21:40,580 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) [2024-06-20 17:21:40,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:40,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:40,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:21:40,581 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)] === [2024-06-20 17:21:40,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:40,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1855887770, now seen corresponding path program 1 times [2024-06-20 17:21:40,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:40,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316674050] [2024-06-20 17:21:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:40,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:41,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:41,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316674050] [2024-06-20 17:21:41,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316674050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:41,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:41,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:41,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694654547] [2024-06-20 17:21:41,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:41,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:41,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:41,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:41,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:41,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:41,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 225 transitions, 2243 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:41,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:41,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:41,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:42,191 INFO L124 PetriNetUnfolderBase]: 1958/3080 cut-off events. [2024-06-20 17:21:42,191 INFO L125 PetriNetUnfolderBase]: For 125657/125657 co-relation queries the response was YES. [2024-06-20 17:21:42,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22768 conditions, 3080 events. 1958/3080 cut-off events. For 125657/125657 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16346 event pairs, 267 based on Foata normal form. 4/3081 useless extension candidates. Maximal degree in co-relation 22680. Up to 2839 conditions per place. [2024-06-20 17:21:42,220 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 238 selfloop transitions, 23 changer transitions 0/266 dead transitions. [2024-06-20 17:21:42,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 266 transitions, 2993 flow [2024-06-20 17:21:42,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:21:42,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 17:21:42,221 INFO L175 Difference]: Start difference. First operand has 177 places, 225 transitions, 2243 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:21:42,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 266 transitions, 2993 flow [2024-06-20 17:21:42,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 266 transitions, 2950 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 17:21:42,356 INFO L231 Difference]: Finished difference. Result has 185 places, 231 transitions, 2392 flow [2024-06-20 17:21:42,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2392, PETRI_PLACES=185, PETRI_TRANSITIONS=231} [2024-06-20 17:21:42,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-20 17:21:42,356 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 231 transitions, 2392 flow [2024-06-20 17:21:42,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:42,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:42,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:42,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:21:42,357 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:42,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:42,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1767174140, now seen corresponding path program 2 times [2024-06-20 17:21:42,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:42,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851030506] [2024-06-20 17:21:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:42,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:43,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:43,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851030506] [2024-06-20 17:21:43,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851030506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:43,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:43,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:43,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741037775] [2024-06-20 17:21:43,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:43,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:43,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:43,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:43,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:43,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:43,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 231 transitions, 2392 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:43,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:43,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:43,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:44,097 INFO L124 PetriNetUnfolderBase]: 1975/3107 cut-off events. [2024-06-20 17:21:44,097 INFO L125 PetriNetUnfolderBase]: For 132770/132770 co-relation queries the response was YES. [2024-06-20 17:21:44,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23353 conditions, 3107 events. 1975/3107 cut-off events. For 132770/132770 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16570 event pairs, 391 based on Foata normal form. 4/3108 useless extension candidates. Maximal degree in co-relation 23262. Up to 2889 conditions per place. [2024-06-20 17:21:44,129 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 230 selfloop transitions, 31 changer transitions 0/266 dead transitions. [2024-06-20 17:21:44,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 266 transitions, 3064 flow [2024-06-20 17:21:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:44,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:21:44,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 17:21:44,130 INFO L175 Difference]: Start difference. First operand has 185 places, 231 transitions, 2392 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:21:44,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 266 transitions, 3064 flow [2024-06-20 17:21:44,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 266 transitions, 2937 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-20 17:21:44,279 INFO L231 Difference]: Finished difference. Result has 190 places, 233 transitions, 2389 flow [2024-06-20 17:21:44,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2265, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2389, PETRI_PLACES=190, PETRI_TRANSITIONS=233} [2024-06-20 17:21:44,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-20 17:21:44,280 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 233 transitions, 2389 flow [2024-06-20 17:21:44,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:44,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:44,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:44,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:21:44,280 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:44,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:44,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1767322010, now seen corresponding path program 3 times [2024-06-20 17:21:44,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:44,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254314942] [2024-06-20 17:21:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:44,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:45,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:45,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254314942] [2024-06-20 17:21:45,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254314942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:45,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:45,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:45,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863858338] [2024-06-20 17:21:45,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:45,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:45,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:45,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:45,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:45,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:45,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 233 transitions, 2389 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:45,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:45,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:45,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:46,061 INFO L124 PetriNetUnfolderBase]: 1992/3134 cut-off events. [2024-06-20 17:21:46,061 INFO L125 PetriNetUnfolderBase]: For 139594/139594 co-relation queries the response was YES. [2024-06-20 17:21:46,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23744 conditions, 3134 events. 1992/3134 cut-off events. For 139594/139594 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16782 event pairs, 389 based on Foata normal form. 4/3135 useless extension candidates. Maximal degree in co-relation 23651. Up to 2870 conditions per place. [2024-06-20 17:21:46,094 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 233 selfloop transitions, 33 changer transitions 0/271 dead transitions. [2024-06-20 17:21:46,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 271 transitions, 3119 flow [2024-06-20 17:21:46,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:46,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 17:21:46,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:21:46,095 INFO L175 Difference]: Start difference. First operand has 190 places, 233 transitions, 2389 flow. Second operand 9 states and 171 transitions. [2024-06-20 17:21:46,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 271 transitions, 3119 flow [2024-06-20 17:21:46,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 271 transitions, 3015 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:46,242 INFO L231 Difference]: Finished difference. Result has 193 places, 237 transitions, 2468 flow [2024-06-20 17:21:46,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2468, PETRI_PLACES=193, PETRI_TRANSITIONS=237} [2024-06-20 17:21:46,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-20 17:21:46,242 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 237 transitions, 2468 flow [2024-06-20 17:21:46,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:46,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:46,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:46,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:21:46,243 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)] === [2024-06-20 17:21:46,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:46,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1390319060, now seen corresponding path program 1 times [2024-06-20 17:21:46,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:46,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860910608] [2024-06-20 17:21:46,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:46,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:47,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:47,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860910608] [2024-06-20 17:21:47,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860910608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:47,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:47,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:21:47,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875101943] [2024-06-20 17:21:47,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:47,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:21:47,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:47,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:21:47,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:21:47,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:47,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 237 transitions, 2468 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:47,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:47,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:47,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:48,331 INFO L124 PetriNetUnfolderBase]: 2050/3232 cut-off events. [2024-06-20 17:21:48,331 INFO L125 PetriNetUnfolderBase]: For 156738/156738 co-relation queries the response was YES. [2024-06-20 17:21:48,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24746 conditions, 3232 events. 2050/3232 cut-off events. For 156738/156738 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17471 event pairs, 407 based on Foata normal form. 16/3245 useless extension candidates. Maximal degree in co-relation 24651. Up to 2898 conditions per place. [2024-06-20 17:21:48,358 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 239 selfloop transitions, 34 changer transitions 0/278 dead transitions. [2024-06-20 17:21:48,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 278 transitions, 3218 flow [2024-06-20 17:21:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:21:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:21:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 17:21:48,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-20 17:21:48,359 INFO L175 Difference]: Start difference. First operand has 193 places, 237 transitions, 2468 flow. Second operand 10 states and 189 transitions. [2024-06-20 17:21:48,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 278 transitions, 3218 flow [2024-06-20 17:21:48,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 278 transitions, 3076 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:48,494 INFO L231 Difference]: Finished difference. Result has 197 places, 238 transitions, 2446 flow [2024-06-20 17:21:48,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2446, PETRI_PLACES=197, PETRI_TRANSITIONS=238} [2024-06-20 17:21:48,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-20 17:21:48,495 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 238 transitions, 2446 flow [2024-06-20 17:21:48,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:48,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:48,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:48,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:21:48,496 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)] === [2024-06-20 17:21:48,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:48,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1648417178, now seen corresponding path program 4 times [2024-06-20 17:21:48,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:48,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046839443] [2024-06-20 17:21:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:48,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:49,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:49,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046839443] [2024-06-20 17:21:49,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046839443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:49,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:49,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:49,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136155260] [2024-06-20 17:21:49,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:49,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:49,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:49,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:49,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:49,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:49,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 238 transitions, 2446 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:49,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:49,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:49,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:50,203 INFO L124 PetriNetUnfolderBase]: 2067/3259 cut-off events. [2024-06-20 17:21:50,203 INFO L125 PetriNetUnfolderBase]: For 153744/153744 co-relation queries the response was YES. [2024-06-20 17:21:50,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24948 conditions, 3259 events. 2067/3259 cut-off events. For 153744/153744 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17594 event pairs, 402 based on Foata normal form. 4/3260 useless extension candidates. Maximal degree in co-relation 24852. Up to 3021 conditions per place. [2024-06-20 17:21:50,234 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 27 changer transitions 0/276 dead transitions. [2024-06-20 17:21:50,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 276 transitions, 3223 flow [2024-06-20 17:21:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:21:50,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 17:21:50,239 INFO L175 Difference]: Start difference. First operand has 197 places, 238 transitions, 2446 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:21:50,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 276 transitions, 3223 flow [2024-06-20 17:21:50,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 276 transitions, 3147 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 17:21:50,355 INFO L231 Difference]: Finished difference. Result has 200 places, 245 transitions, 2597 flow [2024-06-20 17:21:50,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2597, PETRI_PLACES=200, PETRI_TRANSITIONS=245} [2024-06-20 17:21:50,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-20 17:21:50,356 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 245 transitions, 2597 flow [2024-06-20 17:21:50,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:50,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:50,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:50,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:21:50,356 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)] === [2024-06-20 17:21:50,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:50,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1398351008, now seen corresponding path program 2 times [2024-06-20 17:21:50,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:50,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674822479] [2024-06-20 17:21:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:50,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:51,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:51,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674822479] [2024-06-20 17:21:51,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674822479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:51,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:51,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:21:51,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146710444] [2024-06-20 17:21:51,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:51,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:21:51,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:51,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:21:51,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:21:51,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:51,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 245 transitions, 2597 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:51,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:51,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:51,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:52,361 INFO L124 PetriNetUnfolderBase]: 2125/3370 cut-off events. [2024-06-20 17:21:52,361 INFO L125 PetriNetUnfolderBase]: For 173085/173085 co-relation queries the response was YES. [2024-06-20 17:21:52,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25986 conditions, 3370 events. 2125/3370 cut-off events. For 173085/173085 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18500 event pairs, 433 based on Foata normal form. 16/3383 useless extension candidates. Maximal degree in co-relation 25887. Up to 2983 conditions per place. [2024-06-20 17:21:52,397 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 229 selfloop transitions, 50 changer transitions 0/284 dead transitions. [2024-06-20 17:21:52,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 284 transitions, 3355 flow [2024-06-20 17:21:52,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:21:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:21:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 17:21:52,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-20 17:21:52,399 INFO L175 Difference]: Start difference. First operand has 200 places, 245 transitions, 2597 flow. Second operand 10 states and 189 transitions. [2024-06-20 17:21:52,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 284 transitions, 3355 flow [2024-06-20 17:21:52,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 284 transitions, 3218 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-20 17:21:52,577 INFO L231 Difference]: Finished difference. Result has 207 places, 246 transitions, 2611 flow [2024-06-20 17:21:52,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2460, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2611, PETRI_PLACES=207, PETRI_TRANSITIONS=246} [2024-06-20 17:21:52,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-20 17:21:52,577 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 246 transitions, 2611 flow [2024-06-20 17:21:52,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:52,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:52,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:52,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:21:52,578 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)] === [2024-06-20 17:21:52,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:52,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1398617918, now seen corresponding path program 3 times [2024-06-20 17:21:52,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:52,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645059221] [2024-06-20 17:21:52,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:52,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:53,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:53,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645059221] [2024-06-20 17:21:53,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645059221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:53,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:53,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:21:53,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042192080] [2024-06-20 17:21:53,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:53,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:21:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:53,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:21:53,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:21:53,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:53,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 246 transitions, 2611 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:53,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:53,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:53,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:54,535 INFO L124 PetriNetUnfolderBase]: 2248/3583 cut-off events. [2024-06-20 17:21:54,535 INFO L125 PetriNetUnfolderBase]: For 179574/179574 co-relation queries the response was YES. [2024-06-20 17:21:54,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27324 conditions, 3583 events. 2248/3583 cut-off events. For 179574/179574 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20041 event pairs, 449 based on Foata normal form. 12/3592 useless extension candidates. Maximal degree in co-relation 27223. Up to 2925 conditions per place. [2024-06-20 17:21:54,575 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 231 selfloop transitions, 54 changer transitions 0/290 dead transitions. [2024-06-20 17:21:54,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 290 transitions, 3463 flow [2024-06-20 17:21:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:21:54,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:21:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 17:21:54,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-20 17:21:54,577 INFO L175 Difference]: Start difference. First operand has 207 places, 246 transitions, 2611 flow. Second operand 10 states and 191 transitions. [2024-06-20 17:21:54,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 290 transitions, 3463 flow [2024-06-20 17:21:54,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 290 transitions, 3344 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 17:21:54,839 INFO L231 Difference]: Finished difference. Result has 210 places, 249 transitions, 2712 flow [2024-06-20 17:21:54,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2492, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2712, PETRI_PLACES=210, PETRI_TRANSITIONS=249} [2024-06-20 17:21:54,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-20 17:21:54,840 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 249 transitions, 2712 flow [2024-06-20 17:21:54,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:54,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:54,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:54,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:21:54,840 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)] === [2024-06-20 17:21:54,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:54,841 INFO L85 PathProgramCache]: Analyzing trace with hash 271347302, now seen corresponding path program 5 times [2024-06-20 17:21:54,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:54,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824696914] [2024-06-20 17:21:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:54,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:55,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:55,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824696914] [2024-06-20 17:21:55,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824696914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:55,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:55,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:55,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83377937] [2024-06-20 17:21:55,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:55,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:55,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:55,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:55,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:55,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:55,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 249 transitions, 2712 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:55,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:55,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:55,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:56,686 INFO L124 PetriNetUnfolderBase]: 2240/3565 cut-off events. [2024-06-20 17:21:56,686 INFO L125 PetriNetUnfolderBase]: For 175668/175668 co-relation queries the response was YES. [2024-06-20 17:21:56,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27220 conditions, 3565 events. 2240/3565 cut-off events. For 175668/175668 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19942 event pairs, 460 based on Foata normal form. 4/3560 useless extension candidates. Maximal degree in co-relation 27117. Up to 3225 conditions per place. [2024-06-20 17:21:56,720 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 234 selfloop transitions, 46 changer transitions 0/285 dead transitions. [2024-06-20 17:21:56,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 285 transitions, 3526 flow [2024-06-20 17:21:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:21:56,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 17:21:56,722 INFO L175 Difference]: Start difference. First operand has 210 places, 249 transitions, 2712 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:21:56,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 285 transitions, 3526 flow [2024-06-20 17:21:56,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 285 transitions, 3398 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:56,917 INFO L231 Difference]: Finished difference. Result has 213 places, 256 transitions, 2869 flow [2024-06-20 17:21:56,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2584, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2869, PETRI_PLACES=213, PETRI_TRANSITIONS=256} [2024-06-20 17:21:56,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-20 17:21:56,917 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 256 transitions, 2869 flow [2024-06-20 17:21:56,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 17:21:56,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:56,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:56,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:21:56,918 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:56,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:56,918 INFO L85 PathProgramCache]: Analyzing trace with hash 478154564, now seen corresponding path program 4 times [2024-06-20 17:21:56,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:56,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951651302] [2024-06-20 17:21:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:56,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:58,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:58,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951651302] [2024-06-20 17:21:58,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951651302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:58,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:58,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:21:58,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931111812] [2024-06-20 17:21:58,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:58,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:21:58,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:58,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:21:58,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:21:58,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:21:58,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 256 transitions, 2869 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:58,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:58,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:21:58,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:59,177 INFO L124 PetriNetUnfolderBase]: 2298/3678 cut-off events. [2024-06-20 17:21:59,177 INFO L125 PetriNetUnfolderBase]: For 196459/196459 co-relation queries the response was YES. [2024-06-20 17:21:59,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28154 conditions, 3678 events. 2298/3678 cut-off events. For 196459/196459 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20878 event pairs, 482 based on Foata normal form. 16/3685 useless extension candidates. Maximal degree in co-relation 28049. Up to 3281 conditions per place. [2024-06-20 17:21:59,218 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 239 selfloop transitions, 48 changer transitions 0/292 dead transitions. [2024-06-20 17:21:59,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 292 transitions, 3639 flow [2024-06-20 17:21:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:21:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:21:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 17:21:59,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:21:59,221 INFO L175 Difference]: Start difference. First operand has 213 places, 256 transitions, 2869 flow. Second operand 10 states and 190 transitions. [2024-06-20 17:21:59,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 292 transitions, 3639 flow [2024-06-20 17:21:59,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 292 transitions, 3441 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:59,455 INFO L231 Difference]: Finished difference. Result has 218 places, 257 transitions, 2824 flow [2024-06-20 17:21:59,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2824, PETRI_PLACES=218, PETRI_TRANSITIONS=257} [2024-06-20 17:21:59,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-20 17:21:59,456 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 257 transitions, 2824 flow [2024-06-20 17:21:59,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:21:59,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:59,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:59,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:21:59,456 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:21:59,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:59,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1570830976, now seen corresponding path program 5 times [2024-06-20 17:21:59,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:59,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133616011] [2024-06-20 17:21:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:59,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:00,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:00,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133616011] [2024-06-20 17:22:00,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133616011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:00,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:00,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:22:00,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926619223] [2024-06-20 17:22:00,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:00,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:22:00,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:00,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:22:00,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:22:00,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:00,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 257 transitions, 2824 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:00,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:00,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:00,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:01,497 INFO L124 PetriNetUnfolderBase]: 2482/3998 cut-off events. [2024-06-20 17:22:01,497 INFO L125 PetriNetUnfolderBase]: For 214308/214308 co-relation queries the response was YES. [2024-06-20 17:22:01,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30513 conditions, 3998 events. 2482/3998 cut-off events. For 214308/214308 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23210 event pairs, 497 based on Foata normal form. 12/3997 useless extension candidates. Maximal degree in co-relation 30408. Up to 2561 conditions per place. [2024-06-20 17:22:01,540 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 191 selfloop transitions, 106 changer transitions 0/302 dead transitions. [2024-06-20 17:22:01,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 302 transitions, 3916 flow [2024-06-20 17:22:01,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 17:22:01,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 17:22:01,541 INFO L175 Difference]: Start difference. First operand has 218 places, 257 transitions, 2824 flow. Second operand 10 states and 195 transitions. [2024-06-20 17:22:01,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 302 transitions, 3916 flow [2024-06-20 17:22:01,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 302 transitions, 3795 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 17:22:01,812 INFO L231 Difference]: Finished difference. Result has 221 places, 261 transitions, 3098 flow [2024-06-20 17:22:01,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3098, PETRI_PLACES=221, PETRI_TRANSITIONS=261} [2024-06-20 17:22:01,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-20 17:22:01,813 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 261 transitions, 3098 flow [2024-06-20 17:22:01,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:01,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:01,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:01,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:22:01,814 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:01,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:01,814 INFO L85 PathProgramCache]: Analyzing trace with hash 478421474, now seen corresponding path program 6 times [2024-06-20 17:22:01,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:01,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166300219] [2024-06-20 17:22:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:01,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:02,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:02,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166300219] [2024-06-20 17:22:02,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166300219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:02,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:02,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:22:02,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877360439] [2024-06-20 17:22:02,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:02,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:22:02,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:02,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:22:02,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:22:03,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:03,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 261 transitions, 3098 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:03,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:03,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:03,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:04,006 INFO L124 PetriNetUnfolderBase]: 2523/4075 cut-off events. [2024-06-20 17:22:04,006 INFO L125 PetriNetUnfolderBase]: For 224653/224653 co-relation queries the response was YES. [2024-06-20 17:22:04,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31636 conditions, 4075 events. 2523/4075 cut-off events. For 224653/224653 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 23876 event pairs, 551 based on Foata normal form. 12/4078 useless extension candidates. Maximal degree in co-relation 31529. Up to 3489 conditions per place. [2024-06-20 17:22:04,045 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 244 selfloop transitions, 51 changer transitions 0/300 dead transitions. [2024-06-20 17:22:04,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 300 transitions, 3925 flow [2024-06-20 17:22:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-20 17:22:04,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-20 17:22:04,046 INFO L175 Difference]: Start difference. First operand has 221 places, 261 transitions, 3098 flow. Second operand 10 states and 192 transitions. [2024-06-20 17:22:04,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 300 transitions, 3925 flow [2024-06-20 17:22:04,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 300 transitions, 3757 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:04,362 INFO L231 Difference]: Finished difference. Result has 225 places, 262 transitions, 3093 flow [2024-06-20 17:22:04,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3093, PETRI_PLACES=225, PETRI_TRANSITIONS=262} [2024-06-20 17:22:04,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-20 17:22:04,363 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 262 transitions, 3093 flow [2024-06-20 17:22:04,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:04,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:04,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:04,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:22:04,364 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:04,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2132691584, now seen corresponding path program 7 times [2024-06-20 17:22:04,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:04,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460340412] [2024-06-20 17:22:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:04,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:05,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:05,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460340412] [2024-06-20 17:22:05,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460340412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:05,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:05,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:22:05,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314568812] [2024-06-20 17:22:05,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:05,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:22:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:05,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:22:05,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:22:05,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:05,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 262 transitions, 3093 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:05,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:05,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:05,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:06,618 INFO L124 PetriNetUnfolderBase]: 2650/4298 cut-off events. [2024-06-20 17:22:06,618 INFO L125 PetriNetUnfolderBase]: For 249670/249670 co-relation queries the response was YES. [2024-06-20 17:22:06,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34062 conditions, 4298 events. 2650/4298 cut-off events. For 249670/249670 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 25647 event pairs, 592 based on Foata normal form. 12/4301 useless extension candidates. Maximal degree in co-relation 33953. Up to 3666 conditions per place. [2024-06-20 17:22:06,669 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 246 selfloop transitions, 53 changer transitions 0/304 dead transitions. [2024-06-20 17:22:06,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 304 transitions, 4153 flow [2024-06-20 17:22:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 17:22:06,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-20 17:22:06,671 INFO L175 Difference]: Start difference. First operand has 225 places, 262 transitions, 3093 flow. Second operand 10 states and 193 transitions. [2024-06-20 17:22:06,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 304 transitions, 4153 flow [2024-06-20 17:22:07,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 304 transitions, 4036 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 17:22:07,036 INFO L231 Difference]: Finished difference. Result has 228 places, 264 transitions, 3184 flow [2024-06-20 17:22:07,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2976, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3184, PETRI_PLACES=228, PETRI_TRANSITIONS=264} [2024-06-20 17:22:07,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-20 17:22:07,037 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 264 transitions, 3184 flow [2024-06-20 17:22:07,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:07,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:07,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:07,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:22:07,037 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)] === [2024-06-20 17:22:07,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:07,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2132958494, now seen corresponding path program 8 times [2024-06-20 17:22:07,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:07,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338007898] [2024-06-20 17:22:07,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:07,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:08,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:08,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338007898] [2024-06-20 17:22:08,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338007898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:08,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:08,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:22:08,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390494752] [2024-06-20 17:22:08,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:08,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:22:08,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:08,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:22:08,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:22:08,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:08,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 264 transitions, 3184 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:08,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:08,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:08,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:09,279 INFO L124 PetriNetUnfolderBase]: 2622/4254 cut-off events. [2024-06-20 17:22:09,279 INFO L125 PetriNetUnfolderBase]: For 247241/247241 co-relation queries the response was YES. [2024-06-20 17:22:09,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33061 conditions, 4254 events. 2622/4254 cut-off events. For 247241/247241 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 25378 event pairs, 591 based on Foata normal form. 16/4261 useless extension candidates. Maximal degree in co-relation 32951. Up to 3837 conditions per place. [2024-06-20 17:22:09,323 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 244 selfloop transitions, 50 changer transitions 0/299 dead transitions. [2024-06-20 17:22:09,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 299 transitions, 3920 flow [2024-06-20 17:22:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 17:22:09,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-20 17:22:09,324 INFO L175 Difference]: Start difference. First operand has 228 places, 264 transitions, 3184 flow. Second operand 10 states and 189 transitions. [2024-06-20 17:22:09,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 299 transitions, 3920 flow [2024-06-20 17:22:09,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 299 transitions, 3812 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:09,704 INFO L231 Difference]: Finished difference. Result has 232 places, 264 transitions, 3183 flow [2024-06-20 17:22:09,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3076, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3183, PETRI_PLACES=232, PETRI_TRANSITIONS=264} [2024-06-20 17:22:09,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-20 17:22:09,705 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 264 transitions, 3183 flow [2024-06-20 17:22:09,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:09,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:09,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:09,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:22:09,705 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)] === [2024-06-20 17:22:09,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:09,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1794457210, now seen corresponding path program 9 times [2024-06-20 17:22:09,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248463469] [2024-06-20 17:22:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:09,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:10,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:10,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248463469] [2024-06-20 17:22:10,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248463469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:10,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:10,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:22:10,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021744078] [2024-06-20 17:22:10,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:10,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:22:10,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:10,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:22:10,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:22:10,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:10,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 264 transitions, 3183 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:10,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:10,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:10,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:12,041 INFO L124 PetriNetUnfolderBase]: 2663/4319 cut-off events. [2024-06-20 17:22:12,041 INFO L125 PetriNetUnfolderBase]: For 248981/248981 co-relation queries the response was YES. [2024-06-20 17:22:12,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33646 conditions, 4319 events. 2663/4319 cut-off events. For 248981/248981 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 25834 event pairs, 582 based on Foata normal form. 12/4318 useless extension candidates. Maximal degree in co-relation 33534. Up to 3270 conditions per place. [2024-06-20 17:22:12,090 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 203 selfloop transitions, 102 changer transitions 0/310 dead transitions. [2024-06-20 17:22:12,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 310 transitions, 4235 flow [2024-06-20 17:22:12,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:22:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:22:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-20 17:22:12,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745011086474501 [2024-06-20 17:22:12,091 INFO L175 Difference]: Start difference. First operand has 232 places, 264 transitions, 3183 flow. Second operand 11 states and 214 transitions. [2024-06-20 17:22:12,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 310 transitions, 4235 flow [2024-06-20 17:22:12,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 310 transitions, 4134 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 17:22:12,377 INFO L231 Difference]: Finished difference. Result has 235 places, 265 transitions, 3343 flow [2024-06-20 17:22:12,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3343, PETRI_PLACES=235, PETRI_TRANSITIONS=265} [2024-06-20 17:22:12,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-20 17:22:12,378 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 265 transitions, 3343 flow [2024-06-20 17:22:12,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:12,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:12,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:12,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:22:12,378 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)] === [2024-06-20 17:22:12,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:12,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1884797116, now seen corresponding path program 10 times [2024-06-20 17:22:12,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:12,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375850873] [2024-06-20 17:22:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:12,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:13,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:13,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375850873] [2024-06-20 17:22:13,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375850873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:13,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:13,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:22:13,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578325307] [2024-06-20 17:22:13,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:13,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:22:13,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:13,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:22:13,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:22:13,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:13,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 265 transitions, 3343 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:13,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:13,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:13,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:14,779 INFO L124 PetriNetUnfolderBase]: 2635/4275 cut-off events. [2024-06-20 17:22:14,779 INFO L125 PetriNetUnfolderBase]: For 247322/247322 co-relation queries the response was YES. [2024-06-20 17:22:14,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32928 conditions, 4275 events. 2635/4275 cut-off events. For 247322/247322 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 25562 event pairs, 591 based on Foata normal form. 16/4278 useless extension candidates. Maximal degree in co-relation 32815. Up to 3597 conditions per place. [2024-06-20 17:22:14,825 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 206 selfloop transitions, 98 changer transitions 0/309 dead transitions. [2024-06-20 17:22:14,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 309 transitions, 4128 flow [2024-06-20 17:22:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:22:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:22:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 226 transitions. [2024-06-20 17:22:14,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-20 17:22:14,826 INFO L175 Difference]: Start difference. First operand has 235 places, 265 transitions, 3343 flow. Second operand 12 states and 226 transitions. [2024-06-20 17:22:14,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 309 transitions, 4128 flow [2024-06-20 17:22:15,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 309 transitions, 3894 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-20 17:22:15,152 INFO L231 Difference]: Finished difference. Result has 238 places, 266 transitions, 3325 flow [2024-06-20 17:22:15,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3109, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3325, PETRI_PLACES=238, PETRI_TRANSITIONS=266} [2024-06-20 17:22:15,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-20 17:22:15,152 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 266 transitions, 3325 flow [2024-06-20 17:22:15,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:15,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:15,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:15,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:22:15,153 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:15,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:15,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1539092125, now seen corresponding path program 1 times [2024-06-20 17:22:15,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:15,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785154297] [2024-06-20 17:22:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:15,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:15,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:15,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785154297] [2024-06-20 17:22:15,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785154297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:15,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:15,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:15,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094265432] [2024-06-20 17:22:15,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:15,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:15,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:15,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:15,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:16,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:22:16,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 266 transitions, 3325 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:16,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:16,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:22:16,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:16,934 INFO L124 PetriNetUnfolderBase]: 2554/4209 cut-off events. [2024-06-20 17:22:16,935 INFO L125 PetriNetUnfolderBase]: For 231240/231252 co-relation queries the response was YES. [2024-06-20 17:22:16,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32362 conditions, 4209 events. 2554/4209 cut-off events. For 231240/231252 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 25685 event pairs, 555 based on Foata normal form. 3/4205 useless extension candidates. Maximal degree in co-relation 32249. Up to 3844 conditions per place. [2024-06-20 17:22:16,981 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 42 changer transitions 0/299 dead transitions. [2024-06-20 17:22:16,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 299 transitions, 4153 flow [2024-06-20 17:22:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 17:22:16,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 17:22:16,983 INFO L175 Difference]: Start difference. First operand has 238 places, 266 transitions, 3325 flow. Second operand 9 states and 174 transitions. [2024-06-20 17:22:16,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 299 transitions, 4153 flow [2024-06-20 17:22:17,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 299 transitions, 3935 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-20 17:22:17,338 INFO L231 Difference]: Finished difference. Result has 235 places, 272 transitions, 3294 flow [2024-06-20 17:22:17,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3109, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3294, PETRI_PLACES=235, PETRI_TRANSITIONS=272} [2024-06-20 17:22:17,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-20 17:22:17,339 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 272 transitions, 3294 flow [2024-06-20 17:22:17,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:17,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:17,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:17,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:22:17,339 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:17,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:17,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1961043027, now seen corresponding path program 2 times [2024-06-20 17:22:17,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:17,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286236305] [2024-06-20 17:22:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:17,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:18,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:18,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286236305] [2024-06-20 17:22:18,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286236305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:18,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:18,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:18,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119358024] [2024-06-20 17:22:18,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:18,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:18,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:18,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:18,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:22:18,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 272 transitions, 3294 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:18,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:18,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:22:18,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:19,159 INFO L124 PetriNetUnfolderBase]: 2564/4223 cut-off events. [2024-06-20 17:22:19,159 INFO L125 PetriNetUnfolderBase]: For 230288/230300 co-relation queries the response was YES. [2024-06-20 17:22:19,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32437 conditions, 4223 events. 2564/4223 cut-off events. For 230288/230300 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 25797 event pairs, 557 based on Foata normal form. 2/4219 useless extension candidates. Maximal degree in co-relation 32324. Up to 3916 conditions per place. [2024-06-20 17:22:19,204 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 243 selfloop transitions, 28 changer transitions 0/293 dead transitions. [2024-06-20 17:22:19,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 293 transitions, 3942 flow [2024-06-20 17:22:19,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:22:19,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 17:22:19,205 INFO L175 Difference]: Start difference. First operand has 235 places, 272 transitions, 3294 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:22:19,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 293 transitions, 3942 flow [2024-06-20 17:22:19,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 293 transitions, 3849 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 17:22:19,604 INFO L231 Difference]: Finished difference. Result has 238 places, 275 transitions, 3319 flow [2024-06-20 17:22:19,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3207, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3319, PETRI_PLACES=238, PETRI_TRANSITIONS=275} [2024-06-20 17:22:19,604 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-20 17:22:19,604 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 275 transitions, 3319 flow [2024-06-20 17:22:19,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:19,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:19,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:19,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:22:19,605 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:19,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:19,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2118697291, now seen corresponding path program 1 times [2024-06-20 17:22:19,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:19,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065783906] [2024-06-20 17:22:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:19,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:20,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:20,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065783906] [2024-06-20 17:22:20,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065783906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:20,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:20,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:20,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593789819] [2024-06-20 17:22:20,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:20,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:20,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:20,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:20,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:20,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:20,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 275 transitions, 3319 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) [2024-06-20 17:22:20,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:20,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:20,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:21,136 INFO L124 PetriNetUnfolderBase]: 2670/4331 cut-off events. [2024-06-20 17:22:21,136 INFO L125 PetriNetUnfolderBase]: For 235416/235416 co-relation queries the response was YES. [2024-06-20 17:22:21,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33208 conditions, 4331 events. 2670/4331 cut-off events. For 235416/235416 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 25967 event pairs, 595 based on Foata normal form. 1/4329 useless extension candidates. Maximal degree in co-relation 33093. Up to 4134 conditions per place. [2024-06-20 17:22:21,185 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 259 selfloop transitions, 26 changer transitions 0/290 dead transitions. [2024-06-20 17:22:21,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 290 transitions, 3975 flow [2024-06-20 17:22:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:22:21,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:22:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-20 17:22:21,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:22:21,186 INFO L175 Difference]: Start difference. First operand has 238 places, 275 transitions, 3319 flow. Second operand 5 states and 100 transitions. [2024-06-20 17:22:21,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 290 transitions, 3975 flow [2024-06-20 17:22:21,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 290 transitions, 3891 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:21,520 INFO L231 Difference]: Finished difference. Result has 237 places, 278 transitions, 3362 flow [2024-06-20 17:22:21,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3235, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3362, PETRI_PLACES=237, PETRI_TRANSITIONS=278} [2024-06-20 17:22:21,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-20 17:22:21,521 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 278 transitions, 3362 flow [2024-06-20 17:22:21,521 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) [2024-06-20 17:22:21,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:21,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:21,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:22:21,521 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:21,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:21,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2126321803, now seen corresponding path program 3 times [2024-06-20 17:22:21,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:21,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139599516] [2024-06-20 17:22:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:21,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:22,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:22,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139599516] [2024-06-20 17:22:22,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139599516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:22,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:22,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:22,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110743235] [2024-06-20 17:22:22,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:22,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:22,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:22,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:22,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:22,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:22:22,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 278 transitions, 3362 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:22,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:22,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:22:22,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:23,339 INFO L124 PetriNetUnfolderBase]: 2560/4217 cut-off events. [2024-06-20 17:22:23,339 INFO L125 PetriNetUnfolderBase]: For 237826/237826 co-relation queries the response was YES. [2024-06-20 17:22:23,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32575 conditions, 4217 events. 2560/4217 cut-off events. For 237826/237826 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 25691 event pairs, 557 based on Foata normal form. 3/4214 useless extension candidates. Maximal degree in co-relation 32459. Up to 3895 conditions per place. [2024-06-20 17:22:23,386 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 29 changer transitions 0/300 dead transitions. [2024-06-20 17:22:23,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 300 transitions, 3988 flow [2024-06-20 17:22:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:22:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:22:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-20 17:22:23,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-20 17:22:23,387 INFO L175 Difference]: Start difference. First operand has 237 places, 278 transitions, 3362 flow. Second operand 7 states and 141 transitions. [2024-06-20 17:22:23,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 300 transitions, 3988 flow [2024-06-20 17:22:23,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 300 transitions, 3903 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 17:22:23,838 INFO L231 Difference]: Finished difference. Result has 241 places, 278 transitions, 3345 flow [2024-06-20 17:22:23,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3277, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3345, PETRI_PLACES=241, PETRI_TRANSITIONS=278} [2024-06-20 17:22:23,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-20 17:22:23,839 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 278 transitions, 3345 flow [2024-06-20 17:22:23,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:23,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:23,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:23,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:22:23,839 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)] === [2024-06-20 17:22:23,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:23,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1697945294, now seen corresponding path program 1 times [2024-06-20 17:22:23,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:23,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240599512] [2024-06-20 17:22:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:23,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:24,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:24,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240599512] [2024-06-20 17:22:24,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240599512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:24,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:24,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:22:24,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285857633] [2024-06-20 17:22:24,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:24,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:22:24,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:24,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:22:24,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:22:25,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:25,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 278 transitions, 3345 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:25,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:25,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:25,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:26,090 INFO L124 PetriNetUnfolderBase]: 2702/4388 cut-off events. [2024-06-20 17:22:26,090 INFO L125 PetriNetUnfolderBase]: For 258320/258320 co-relation queries the response was YES. [2024-06-20 17:22:26,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33873 conditions, 4388 events. 2702/4388 cut-off events. For 258320/258320 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 26328 event pairs, 447 based on Foata normal form. 12/4397 useless extension candidates. Maximal degree in co-relation 33756. Up to 4037 conditions per place. [2024-06-20 17:22:26,138 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 24 changer transitions 0/321 dead transitions. [2024-06-20 17:22:26,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 321 transitions, 4169 flow [2024-06-20 17:22:26,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 17:22:26,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 17:22:26,139 INFO L175 Difference]: Start difference. First operand has 241 places, 278 transitions, 3345 flow. Second operand 10 states and 187 transitions. [2024-06-20 17:22:26,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 321 transitions, 4169 flow [2024-06-20 17:22:26,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 321 transitions, 4101 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:26,589 INFO L231 Difference]: Finished difference. Result has 245 places, 279 transitions, 3385 flow [2024-06-20 17:22:26,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3277, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3385, PETRI_PLACES=245, PETRI_TRANSITIONS=279} [2024-06-20 17:22:26,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-20 17:22:26,590 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 279 transitions, 3385 flow [2024-06-20 17:22:26,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:26,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:26,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:26,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:22:26,590 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)] === [2024-06-20 17:22:26,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:26,590 INFO L85 PathProgramCache]: Analyzing trace with hash 145450146, now seen corresponding path program 2 times [2024-06-20 17:22:26,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:26,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940303822] [2024-06-20 17:22:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:26,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:27,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:27,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940303822] [2024-06-20 17:22:27,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940303822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:27,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:27,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:22:27,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9204491] [2024-06-20 17:22:27,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:27,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:22:27,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:27,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:22:27,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:22:27,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:27,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 279 transitions, 3385 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:27,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:27,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:27,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:28,778 INFO L124 PetriNetUnfolderBase]: 2743/4463 cut-off events. [2024-06-20 17:22:28,778 INFO L125 PetriNetUnfolderBase]: For 268681/268681 co-relation queries the response was YES. [2024-06-20 17:22:28,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34612 conditions, 4463 events. 2743/4463 cut-off events. For 268681/268681 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26930 event pairs, 580 based on Foata normal form. 12/4472 useless extension candidates. Maximal degree in co-relation 34494. Up to 4085 conditions per place. [2024-06-20 17:22:28,829 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 282 selfloop transitions, 34 changer transitions 0/321 dead transitions. [2024-06-20 17:22:28,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 321 transitions, 4209 flow [2024-06-20 17:22:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 17:22:28,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-20 17:22:28,830 INFO L175 Difference]: Start difference. First operand has 245 places, 279 transitions, 3385 flow. Second operand 10 states and 189 transitions. [2024-06-20 17:22:28,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 321 transitions, 4209 flow [2024-06-20 17:22:29,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 321 transitions, 4129 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-20 17:22:29,294 INFO L231 Difference]: Finished difference. Result has 247 places, 280 transitions, 3435 flow [2024-06-20 17:22:29,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3305, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3435, PETRI_PLACES=247, PETRI_TRANSITIONS=280} [2024-06-20 17:22:29,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-20 17:22:29,294 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 280 transitions, 3435 flow [2024-06-20 17:22:29,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:29,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:29,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:29,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:22:29,295 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:29,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:29,295 INFO L85 PathProgramCache]: Analyzing trace with hash 438675762, now seen corresponding path program 3 times [2024-06-20 17:22:29,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:29,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334951974] [2024-06-20 17:22:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:29,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:30,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:30,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334951974] [2024-06-20 17:22:30,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334951974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:30,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:30,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:22:30,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925344248] [2024-06-20 17:22:30,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:30,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:22:30,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:30,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:22:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:22:30,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:30,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 280 transitions, 3435 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:30,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:30,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:30,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:31,807 INFO L124 PetriNetUnfolderBase]: 2784/4534 cut-off events. [2024-06-20 17:22:31,808 INFO L125 PetriNetUnfolderBase]: For 280762/280762 co-relation queries the response was YES. [2024-06-20 17:22:31,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35199 conditions, 4534 events. 2784/4534 cut-off events. For 280762/280762 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 27476 event pairs, 595 based on Foata normal form. 12/4543 useless extension candidates. Maximal degree in co-relation 35080. Up to 4182 conditions per place. [2024-06-20 17:22:31,856 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 286 selfloop transitions, 28 changer transitions 0/319 dead transitions. [2024-06-20 17:22:31,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 319 transitions, 4247 flow [2024-06-20 17:22:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 17:22:31,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 17:22:31,857 INFO L175 Difference]: Start difference. First operand has 247 places, 280 transitions, 3435 flow. Second operand 10 states and 187 transitions. [2024-06-20 17:22:31,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 319 transitions, 4247 flow [2024-06-20 17:22:32,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 319 transitions, 4145 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 17:22:32,356 INFO L231 Difference]: Finished difference. Result has 249 places, 281 transitions, 3453 flow [2024-06-20 17:22:32,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3453, PETRI_PLACES=249, PETRI_TRANSITIONS=281} [2024-06-20 17:22:32,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-20 17:22:32,356 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 281 transitions, 3453 flow [2024-06-20 17:22:32,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:32,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:32,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:32,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:22:32,357 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:32,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:32,357 INFO L85 PathProgramCache]: Analyzing trace with hash -746849442, now seen corresponding path program 1 times [2024-06-20 17:22:32,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:32,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963577819] [2024-06-20 17:22:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:32,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:33,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:33,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963577819] [2024-06-20 17:22:33,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963577819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:33,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:33,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:33,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406756359] [2024-06-20 17:22:33,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:33,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:33,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:33,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:33,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:33,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:33,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 281 transitions, 3453 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) [2024-06-20 17:22:33,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:33,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:33,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:34,010 INFO L124 PetriNetUnfolderBase]: 2810/4570 cut-off events. [2024-06-20 17:22:34,010 INFO L125 PetriNetUnfolderBase]: For 278354/278354 co-relation queries the response was YES. [2024-06-20 17:22:34,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35630 conditions, 4570 events. 2810/4570 cut-off events. For 278354/278354 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27688 event pairs, 622 based on Foata normal form. 2/4569 useless extension candidates. Maximal degree in co-relation 35510. Up to 4304 conditions per place. [2024-06-20 17:22:34,059 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 35 changer transitions 0/312 dead transitions. [2024-06-20 17:22:34,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 312 transitions, 4437 flow [2024-06-20 17:22:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 17:22:34,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-20 17:22:34,061 INFO L175 Difference]: Start difference. First operand has 249 places, 281 transitions, 3453 flow. Second operand 8 states and 153 transitions. [2024-06-20 17:22:34,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 312 transitions, 4437 flow [2024-06-20 17:22:34,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 312 transitions, 4345 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 17:22:34,586 INFO L231 Difference]: Finished difference. Result has 249 places, 287 transitions, 3592 flow [2024-06-20 17:22:34,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3361, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3592, PETRI_PLACES=249, PETRI_TRANSITIONS=287} [2024-06-20 17:22:34,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-20 17:22:34,587 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 287 transitions, 3592 flow [2024-06-20 17:22:34,587 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) [2024-06-20 17:22:34,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:34,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:34,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:22:34,587 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:34,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:34,587 INFO L85 PathProgramCache]: Analyzing trace with hash -746729472, now seen corresponding path program 2 times [2024-06-20 17:22:34,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:34,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533707594] [2024-06-20 17:22:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:34,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:35,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:35,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533707594] [2024-06-20 17:22:35,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533707594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:35,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:35,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:35,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981409167] [2024-06-20 17:22:35,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:35,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:35,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:35,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:35,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:35,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:35,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 287 transitions, 3592 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) [2024-06-20 17:22:35,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:35,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:35,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:36,362 INFO L124 PetriNetUnfolderBase]: 2830/4602 cut-off events. [2024-06-20 17:22:36,363 INFO L125 PetriNetUnfolderBase]: For 286844/286844 co-relation queries the response was YES. [2024-06-20 17:22:36,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36141 conditions, 4602 events. 2830/4602 cut-off events. For 286844/286844 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 27938 event pairs, 623 based on Foata normal form. 2/4601 useless extension candidates. Maximal degree in co-relation 36020. Up to 4362 conditions per place. [2024-06-20 17:22:36,415 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 34 changer transitions 0/316 dead transitions. [2024-06-20 17:22:36,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 316 transitions, 4432 flow [2024-06-20 17:22:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:36,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 17:22:36,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 17:22:36,417 INFO L175 Difference]: Start difference. First operand has 249 places, 287 transitions, 3592 flow. Second operand 8 states and 148 transitions. [2024-06-20 17:22:36,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 316 transitions, 4432 flow [2024-06-20 17:22:36,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 316 transitions, 4318 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-20 17:22:36,876 INFO L231 Difference]: Finished difference. Result has 253 places, 295 transitions, 3694 flow [2024-06-20 17:22:36,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3694, PETRI_PLACES=253, PETRI_TRANSITIONS=295} [2024-06-20 17:22:36,877 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-20 17:22:36,877 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 295 transitions, 3694 flow [2024-06-20 17:22:36,877 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) [2024-06-20 17:22:36,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:36,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:36,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:22:36,878 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:36,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:36,878 INFO L85 PathProgramCache]: Analyzing trace with hash -746729286, now seen corresponding path program 1 times [2024-06-20 17:22:36,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:36,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225386210] [2024-06-20 17:22:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:36,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:37,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:37,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225386210] [2024-06-20 17:22:37,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225386210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:37,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:37,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:37,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181261768] [2024-06-20 17:22:37,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:37,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:37,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:37,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:37,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:37,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:37,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 295 transitions, 3694 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) [2024-06-20 17:22:37,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:37,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:37,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:38,531 INFO L124 PetriNetUnfolderBase]: 2882/4672 cut-off events. [2024-06-20 17:22:38,531 INFO L125 PetriNetUnfolderBase]: For 306956/306956 co-relation queries the response was YES. [2024-06-20 17:22:38,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37125 conditions, 4672 events. 2882/4672 cut-off events. For 306956/306956 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 28376 event pairs, 623 based on Foata normal form. 4/4673 useless extension candidates. Maximal degree in co-relation 37002. Up to 4384 conditions per place. [2024-06-20 17:22:38,587 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 286 selfloop transitions, 40 changer transitions 0/331 dead transitions. [2024-06-20 17:22:38,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 331 transitions, 4757 flow [2024-06-20 17:22:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:38,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 17:22:38,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 17:22:38,588 INFO L175 Difference]: Start difference. First operand has 253 places, 295 transitions, 3694 flow. Second operand 8 states and 154 transitions. [2024-06-20 17:22:38,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 331 transitions, 4757 flow [2024-06-20 17:22:39,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 331 transitions, 4655 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 17:22:39,088 INFO L231 Difference]: Finished difference. Result has 258 places, 306 transitions, 3890 flow [2024-06-20 17:22:39,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3890, PETRI_PLACES=258, PETRI_TRANSITIONS=306} [2024-06-20 17:22:39,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-20 17:22:39,089 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 306 transitions, 3890 flow [2024-06-20 17:22:39,089 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) [2024-06-20 17:22:39,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:39,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:39,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:22:39,089 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:39,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:39,090 INFO L85 PathProgramCache]: Analyzing trace with hash -569597766, now seen corresponding path program 2 times [2024-06-20 17:22:39,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:39,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355629410] [2024-06-20 17:22:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:39,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:39,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:39,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355629410] [2024-06-20 17:22:39,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355629410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:39,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:39,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:39,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929145119] [2024-06-20 17:22:39,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:39,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:39,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:39,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:39,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:39,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 306 transitions, 3890 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) [2024-06-20 17:22:39,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:39,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:39,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:40,810 INFO L124 PetriNetUnfolderBase]: 2944/4767 cut-off events. [2024-06-20 17:22:40,810 INFO L125 PetriNetUnfolderBase]: For 328851/328851 co-relation queries the response was YES. [2024-06-20 17:22:40,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38913 conditions, 4767 events. 2944/4767 cut-off events. For 328851/328851 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 29050 event pairs, 633 based on Foata normal form. 4/4768 useless extension candidates. Maximal degree in co-relation 38788. Up to 4511 conditions per place. [2024-06-20 17:22:40,869 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 300 selfloop transitions, 37 changer transitions 0/342 dead transitions. [2024-06-20 17:22:40,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 342 transitions, 5046 flow [2024-06-20 17:22:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:40,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 17:22:40,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-20 17:22:40,870 INFO L175 Difference]: Start difference. First operand has 258 places, 306 transitions, 3890 flow. Second operand 8 states and 150 transitions. [2024-06-20 17:22:40,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 342 transitions, 5046 flow [2024-06-20 17:22:41,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 342 transitions, 4911 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-20 17:22:41,489 INFO L231 Difference]: Finished difference. Result has 264 places, 320 transitions, 4117 flow [2024-06-20 17:22:41,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3791, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4117, PETRI_PLACES=264, PETRI_TRANSITIONS=320} [2024-06-20 17:22:41,490 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-20 17:22:41,490 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 320 transitions, 4117 flow [2024-06-20 17:22:41,490 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) [2024-06-20 17:22:41,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:41,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:41,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:22:41,490 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:41,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:41,491 INFO L85 PathProgramCache]: Analyzing trace with hash -569360616, now seen corresponding path program 3 times [2024-06-20 17:22:41,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:41,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390180335] [2024-06-20 17:22:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:41,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:42,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:42,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390180335] [2024-06-20 17:22:42,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390180335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:42,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:42,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:42,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060292673] [2024-06-20 17:22:42,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:42,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:42,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:42,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:42,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:42,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:42,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 320 transitions, 4117 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) [2024-06-20 17:22:42,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:42,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:42,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:43,251 INFO L124 PetriNetUnfolderBase]: 2932/4745 cut-off events. [2024-06-20 17:22:43,251 INFO L125 PetriNetUnfolderBase]: For 328607/328607 co-relation queries the response was YES. [2024-06-20 17:22:43,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38494 conditions, 4745 events. 2932/4745 cut-off events. For 328607/328607 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 28880 event pairs, 625 based on Foata normal form. 4/4746 useless extension candidates. Maximal degree in co-relation 38366. Up to 4525 conditions per place. [2024-06-20 17:22:43,314 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 303 selfloop transitions, 30 changer transitions 0/338 dead transitions. [2024-06-20 17:22:43,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 338 transitions, 4855 flow [2024-06-20 17:22:43,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:43,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:22:43,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:22:43,315 INFO L175 Difference]: Start difference. First operand has 264 places, 320 transitions, 4117 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:22:43,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 338 transitions, 4855 flow [2024-06-20 17:22:44,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 338 transitions, 4725 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-20 17:22:44,018 INFO L231 Difference]: Finished difference. Result has 269 places, 320 transitions, 4053 flow [2024-06-20 17:22:44,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3987, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4053, PETRI_PLACES=269, PETRI_TRANSITIONS=320} [2024-06-20 17:22:44,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-20 17:22:44,019 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 320 transitions, 4053 flow [2024-06-20 17:22:44,019 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) [2024-06-20 17:22:44,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:44,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:44,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:22:44,020 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:44,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:44,020 INFO L85 PathProgramCache]: Analyzing trace with hash -287301864, now seen corresponding path program 3 times [2024-06-20 17:22:44,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:44,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883365886] [2024-06-20 17:22:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:44,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:44,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:44,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883365886] [2024-06-20 17:22:44,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883365886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:44,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:44,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:44,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921855485] [2024-06-20 17:22:44,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:44,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:44,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:44,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:44,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:44,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:44,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 320 transitions, 4053 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) [2024-06-20 17:22:44,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:44,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:44,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:45,866 INFO L124 PetriNetUnfolderBase]: 2942/4763 cut-off events. [2024-06-20 17:22:45,866 INFO L125 PetriNetUnfolderBase]: For 331875/331875 co-relation queries the response was YES. [2024-06-20 17:22:45,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38635 conditions, 4763 events. 2942/4763 cut-off events. For 331875/331875 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 29033 event pairs, 628 based on Foata normal form. 2/4762 useless extension candidates. Maximal degree in co-relation 38505. Up to 4551 conditions per place. [2024-06-20 17:22:45,929 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 309 selfloop transitions, 27 changer transitions 0/341 dead transitions. [2024-06-20 17:22:45,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 341 transitions, 4876 flow [2024-06-20 17:22:45,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:45,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 17:22:45,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-20 17:22:45,930 INFO L175 Difference]: Start difference. First operand has 269 places, 320 transitions, 4053 flow. Second operand 8 states and 143 transitions. [2024-06-20 17:22:45,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 341 transitions, 4876 flow [2024-06-20 17:22:46,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 341 transitions, 4814 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:22:46,596 INFO L231 Difference]: Finished difference. Result has 272 places, 323 transitions, 4136 flow [2024-06-20 17:22:46,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3991, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4136, PETRI_PLACES=272, PETRI_TRANSITIONS=323} [2024-06-20 17:22:46,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-20 17:22:46,596 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 323 transitions, 4136 flow [2024-06-20 17:22:46,596 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) [2024-06-20 17:22:46,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:46,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:46,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:22:46,597 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:46,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:46,597 INFO L85 PathProgramCache]: Analyzing trace with hash -569351688, now seen corresponding path program 1 times [2024-06-20 17:22:46,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:46,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132908306] [2024-06-20 17:22:46,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:46,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:47,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:47,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132908306] [2024-06-20 17:22:47,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132908306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:47,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:47,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:47,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129181015] [2024-06-20 17:22:47,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:47,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:47,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:47,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:47,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:47,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:47,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 323 transitions, 4136 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) [2024-06-20 17:22:47,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:47,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:47,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:48,804 INFO L124 PetriNetUnfolderBase]: 2986/4835 cut-off events. [2024-06-20 17:22:48,805 INFO L125 PetriNetUnfolderBase]: For 359915/359915 co-relation queries the response was YES. [2024-06-20 17:22:48,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39169 conditions, 4835 events. 2986/4835 cut-off events. For 359915/359915 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 29567 event pairs, 644 based on Foata normal form. 12/4844 useless extension candidates. Maximal degree in co-relation 39038. Up to 4491 conditions per place. [2024-06-20 17:22:48,855 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 304 selfloop transitions, 42 changer transitions 0/351 dead transitions. [2024-06-20 17:22:48,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 351 transitions, 5024 flow [2024-06-20 17:22:48,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 17:22:48,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-20 17:22:48,856 INFO L175 Difference]: Start difference. First operand has 272 places, 323 transitions, 4136 flow. Second operand 8 states and 153 transitions. [2024-06-20 17:22:48,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 351 transitions, 5024 flow [2024-06-20 17:22:49,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 351 transitions, 4908 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:49,483 INFO L231 Difference]: Finished difference. Result has 274 places, 324 transitions, 4123 flow [2024-06-20 17:22:49,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4020, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4123, PETRI_PLACES=274, PETRI_TRANSITIONS=324} [2024-06-20 17:22:49,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-20 17:22:49,484 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 324 transitions, 4123 flow [2024-06-20 17:22:49,484 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) [2024-06-20 17:22:49,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:49,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:49,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:22:49,484 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)] === [2024-06-20 17:22:49,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:49,485 INFO L85 PathProgramCache]: Analyzing trace with hash -178167502, now seen corresponding path program 4 times [2024-06-20 17:22:49,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:49,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399924388] [2024-06-20 17:22:49,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:49,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:50,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:50,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399924388] [2024-06-20 17:22:50,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399924388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:50,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:50,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:22:50,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615657242] [2024-06-20 17:22:50,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:50,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:22:50,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:50,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:22:50,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:22:50,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:50,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 324 transitions, 4123 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:50,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:50,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:50,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:51,997 INFO L124 PetriNetUnfolderBase]: 2966/4798 cut-off events. [2024-06-20 17:22:51,998 INFO L125 PetriNetUnfolderBase]: For 346352/346352 co-relation queries the response was YES. [2024-06-20 17:22:52,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38411 conditions, 4798 events. 2966/4798 cut-off events. For 346352/346352 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29295 event pairs, 600 based on Foata normal form. 12/4801 useless extension candidates. Maximal degree in co-relation 38279. Up to 4343 conditions per place. [2024-06-20 17:22:52,059 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 306 selfloop transitions, 48 changer transitions 0/359 dead transitions. [2024-06-20 17:22:52,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 359 transitions, 4857 flow [2024-06-20 17:22:52,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 17:22:52,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 17:22:52,060 INFO L175 Difference]: Start difference. First operand has 274 places, 324 transitions, 4123 flow. Second operand 10 states and 187 transitions. [2024-06-20 17:22:52,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 359 transitions, 4857 flow [2024-06-20 17:22:52,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 359 transitions, 4760 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:52,733 INFO L231 Difference]: Finished difference. Result has 277 places, 323 transitions, 4030 flow [2024-06-20 17:22:52,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3930, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4030, PETRI_PLACES=277, PETRI_TRANSITIONS=323} [2024-06-20 17:22:52,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-20 17:22:52,733 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 323 transitions, 4030 flow [2024-06-20 17:22:52,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:22:52,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:52,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:52,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:22:52,734 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:52,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:52,734 INFO L85 PathProgramCache]: Analyzing trace with hash 457622898, now seen corresponding path program 4 times [2024-06-20 17:22:52,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:52,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114888383] [2024-06-20 17:22:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:52,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:53,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:53,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114888383] [2024-06-20 17:22:53,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114888383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:53,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:53,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:53,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473699975] [2024-06-20 17:22:53,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:53,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:53,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:53,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:53,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:53,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:53,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 323 transitions, 4030 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) [2024-06-20 17:22:53,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:53,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:53,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:54,491 INFO L124 PetriNetUnfolderBase]: 3000/4853 cut-off events. [2024-06-20 17:22:54,491 INFO L125 PetriNetUnfolderBase]: For 341104/341104 co-relation queries the response was YES. [2024-06-20 17:22:54,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38979 conditions, 4853 events. 3000/4853 cut-off events. For 341104/341104 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 29678 event pairs, 636 based on Foata normal form. 2/4846 useless extension candidates. Maximal degree in co-relation 38846. Up to 4407 conditions per place. [2024-06-20 17:22:54,556 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 85 changer transitions 0/363 dead transitions. [2024-06-20 17:22:54,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 363 transitions, 5417 flow [2024-06-20 17:22:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:54,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 17:22:54,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 17:22:54,557 INFO L175 Difference]: Start difference. First operand has 277 places, 323 transitions, 4030 flow. Second operand 8 states and 154 transitions. [2024-06-20 17:22:54,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 363 transitions, 5417 flow [2024-06-20 17:22:55,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 363 transitions, 5203 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-20 17:22:55,467 INFO L231 Difference]: Finished difference. Result has 276 places, 338 transitions, 4346 flow [2024-06-20 17:22:55,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3816, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4346, PETRI_PLACES=276, PETRI_TRANSITIONS=338} [2024-06-20 17:22:55,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-20 17:22:55,468 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 338 transitions, 4346 flow [2024-06-20 17:22:55,468 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) [2024-06-20 17:22:55,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:55,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:55,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:22:55,468 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:55,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:55,468 INFO L85 PathProgramCache]: Analyzing trace with hash 201237708, now seen corresponding path program 5 times [2024-06-20 17:22:55,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:55,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031582166] [2024-06-20 17:22:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:55,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:56,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:56,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031582166] [2024-06-20 17:22:56,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031582166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:56,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:56,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:56,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362742785] [2024-06-20 17:22:56,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:56,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:56,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:56,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:56,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:56,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:56,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 338 transitions, 4346 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) [2024-06-20 17:22:56,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:56,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:56,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:57,298 INFO L124 PetriNetUnfolderBase]: 3010/4872 cut-off events. [2024-06-20 17:22:57,298 INFO L125 PetriNetUnfolderBase]: For 351558/351558 co-relation queries the response was YES. [2024-06-20 17:22:57,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39242 conditions, 4872 events. 3010/4872 cut-off events. For 351558/351558 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 29880 event pairs, 636 based on Foata normal form. 2/4865 useless extension candidates. Maximal degree in co-relation 39109. Up to 4417 conditions per place. [2024-06-20 17:22:57,351 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 283 selfloop transitions, 81 changer transitions 0/369 dead transitions. [2024-06-20 17:22:57,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 369 transitions, 5726 flow [2024-06-20 17:22:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 17:22:57,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 17:22:57,352 INFO L175 Difference]: Start difference. First operand has 276 places, 338 transitions, 4346 flow. Second operand 8 states and 156 transitions. [2024-06-20 17:22:57,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 369 transitions, 5726 flow [2024-06-20 17:22:58,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 369 transitions, 5526 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-20 17:22:58,168 INFO L231 Difference]: Finished difference. Result has 280 places, 342 transitions, 4431 flow [2024-06-20 17:22:58,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4158, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4431, PETRI_PLACES=280, PETRI_TRANSITIONS=342} [2024-06-20 17:22:58,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-20 17:22:58,169 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 342 transitions, 4431 flow [2024-06-20 17:22:58,169 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) [2024-06-20 17:22:58,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:58,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:22:58,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:22:58,169 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:22:58,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:58,170 INFO L85 PathProgramCache]: Analyzing trace with hash 278730752, now seen corresponding path program 6 times [2024-06-20 17:22:58,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:58,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745344809] [2024-06-20 17:22:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:58,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:58,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:58,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745344809] [2024-06-20 17:22:58,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745344809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:58,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:58,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:58,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323168045] [2024-06-20 17:22:58,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:58,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:58,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:58,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:58,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:59,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:22:59,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 342 transitions, 4431 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) [2024-06-20 17:22:59,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:59,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:22:59,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:00,076 INFO L124 PetriNetUnfolderBase]: 3030/4906 cut-off events. [2024-06-20 17:23:00,076 INFO L125 PetriNetUnfolderBase]: For 359763/359763 co-relation queries the response was YES. [2024-06-20 17:23:00,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39546 conditions, 4906 events. 3030/4906 cut-off events. For 359763/359763 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 30179 event pairs, 635 based on Foata normal form. 2/4899 useless extension candidates. Maximal degree in co-relation 39412. Up to 4590 conditions per place. [2024-06-20 17:23:00,137 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 306 selfloop transitions, 58 changer transitions 0/369 dead transitions. [2024-06-20 17:23:00,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 369 transitions, 5372 flow [2024-06-20 17:23:00,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:00,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:23:00,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 17:23:00,138 INFO L175 Difference]: Start difference. First operand has 280 places, 342 transitions, 4431 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:23:00,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 369 transitions, 5372 flow [2024-06-20 17:23:01,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 369 transitions, 5178 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-20 17:23:01,064 INFO L231 Difference]: Finished difference. Result has 284 places, 350 transitions, 4502 flow [2024-06-20 17:23:01,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4258, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4502, PETRI_PLACES=284, PETRI_TRANSITIONS=350} [2024-06-20 17:23:01,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-20 17:23:01,065 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 350 transitions, 4502 flow [2024-06-20 17:23:01,065 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) [2024-06-20 17:23:01,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:01,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:01,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:23:01,066 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:01,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:01,066 INFO L85 PathProgramCache]: Analyzing trace with hash 547491452, now seen corresponding path program 7 times [2024-06-20 17:23:01,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:01,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071844421] [2024-06-20 17:23:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:01,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:01,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:01,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071844421] [2024-06-20 17:23:01,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071844421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:01,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:01,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:01,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044923480] [2024-06-20 17:23:01,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:01,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:01,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:01,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:01,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:01,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:01,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 350 transitions, 4502 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) [2024-06-20 17:23:01,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:01,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:01,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:02,884 INFO L124 PetriNetUnfolderBase]: 3040/4922 cut-off events. [2024-06-20 17:23:02,884 INFO L125 PetriNetUnfolderBase]: For 368270/368270 co-relation queries the response was YES. [2024-06-20 17:23:02,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39614 conditions, 4922 events. 3040/4922 cut-off events. For 368270/368270 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 30313 event pairs, 636 based on Foata normal form. 2/4915 useless extension candidates. Maximal degree in co-relation 39479. Up to 4443 conditions per place. [2024-06-20 17:23:02,947 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 267 selfloop transitions, 103 changer transitions 0/375 dead transitions. [2024-06-20 17:23:02,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 375 transitions, 5580 flow [2024-06-20 17:23:02,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 17:23:02,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-20 17:23:02,948 INFO L175 Difference]: Start difference. First operand has 284 places, 350 transitions, 4502 flow. Second operand 8 states and 150 transitions. [2024-06-20 17:23:02,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 375 transitions, 5580 flow [2024-06-20 17:23:03,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 375 transitions, 5431 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 17:23:03,831 INFO L231 Difference]: Finished difference. Result has 288 places, 354 transitions, 4657 flow [2024-06-20 17:23:03,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4353, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4657, PETRI_PLACES=288, PETRI_TRANSITIONS=354} [2024-06-20 17:23:03,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-20 17:23:03,831 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 354 transitions, 4657 flow [2024-06-20 17:23:03,832 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) [2024-06-20 17:23:03,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:03,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:03,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:23:03,832 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:03,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:03,832 INFO L85 PathProgramCache]: Analyzing trace with hash 201242544, now seen corresponding path program 4 times [2024-06-20 17:23:03,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:03,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043227173] [2024-06-20 17:23:03,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:03,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:04,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:04,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043227173] [2024-06-20 17:23:04,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043227173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:04,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:04,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:04,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964357083] [2024-06-20 17:23:04,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:04,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:04,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:04,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:04,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:04,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:04,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 354 transitions, 4657 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) [2024-06-20 17:23:04,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:04,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:04,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:05,607 INFO L124 PetriNetUnfolderBase]: 3084/4989 cut-off events. [2024-06-20 17:23:05,607 INFO L125 PetriNetUnfolderBase]: For 391352/391352 co-relation queries the response was YES. [2024-06-20 17:23:05,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40661 conditions, 4989 events. 3084/4989 cut-off events. For 391352/391352 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 30747 event pairs, 641 based on Foata normal form. 4/4984 useless extension candidates. Maximal degree in co-relation 40525. Up to 4525 conditions per place. [2024-06-20 17:23:05,671 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 305 selfloop transitions, 76 changer transitions 0/386 dead transitions. [2024-06-20 17:23:05,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 386 transitions, 5974 flow [2024-06-20 17:23:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 17:23:05,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-20 17:23:05,672 INFO L175 Difference]: Start difference. First operand has 288 places, 354 transitions, 4657 flow. Second operand 8 states and 155 transitions. [2024-06-20 17:23:05,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 386 transitions, 5974 flow [2024-06-20 17:23:06,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 386 transitions, 5780 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-20 17:23:06,405 INFO L231 Difference]: Finished difference. Result has 292 places, 360 transitions, 4772 flow [2024-06-20 17:23:06,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4463, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4772, PETRI_PLACES=292, PETRI_TRANSITIONS=360} [2024-06-20 17:23:06,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-20 17:23:06,406 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 360 transitions, 4772 flow [2024-06-20 17:23:06,406 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) [2024-06-20 17:23:06,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:06,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:06,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:23:06,407 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:06,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:06,407 INFO L85 PathProgramCache]: Analyzing trace with hash 662782622, now seen corresponding path program 8 times [2024-06-20 17:23:06,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:06,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123775129] [2024-06-20 17:23:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:06,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:07,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:07,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123775129] [2024-06-20 17:23:07,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123775129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:07,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:07,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:07,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957643466] [2024-06-20 17:23:07,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:07,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:07,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:07,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:07,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:07,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 360 transitions, 4772 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) [2024-06-20 17:23:07,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:07,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:07,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:08,238 INFO L124 PetriNetUnfolderBase]: 3120/5049 cut-off events. [2024-06-20 17:23:08,238 INFO L125 PetriNetUnfolderBase]: For 406176/406176 co-relation queries the response was YES. [2024-06-20 17:23:08,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41698 conditions, 5049 events. 3120/5049 cut-off events. For 406176/406176 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 31192 event pairs, 639 based on Foata normal form. 2/5042 useless extension candidates. Maximal degree in co-relation 41561. Up to 4683 conditions per place. [2024-06-20 17:23:08,303 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 311 selfloop transitions, 76 changer transitions 0/392 dead transitions. [2024-06-20 17:23:08,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 392 transitions, 6021 flow [2024-06-20 17:23:08,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:23:08,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 17:23:08,304 INFO L175 Difference]: Start difference. First operand has 292 places, 360 transitions, 4772 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:23:08,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 392 transitions, 6021 flow [2024-06-20 17:23:09,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 392 transitions, 5827 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:09,212 INFO L231 Difference]: Finished difference. Result has 296 places, 373 transitions, 5010 flow [2024-06-20 17:23:09,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4578, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5010, PETRI_PLACES=296, PETRI_TRANSITIONS=373} [2024-06-20 17:23:09,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-20 17:23:09,213 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 373 transitions, 5010 flow [2024-06-20 17:23:09,213 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) [2024-06-20 17:23:09,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:09,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:09,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:23:09,213 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:09,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:09,213 INFO L85 PathProgramCache]: Analyzing trace with hash 662515898, now seen corresponding path program 5 times [2024-06-20 17:23:09,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:09,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908460623] [2024-06-20 17:23:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:09,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:09,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:09,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908460623] [2024-06-20 17:23:09,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908460623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:09,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:09,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:09,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89106144] [2024-06-20 17:23:09,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:09,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:09,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:09,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:09,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:09,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:09,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 373 transitions, 5010 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) [2024-06-20 17:23:09,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:09,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:09,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:11,209 INFO L124 PetriNetUnfolderBase]: 3172/5137 cut-off events. [2024-06-20 17:23:11,209 INFO L125 PetriNetUnfolderBase]: For 426361/426361 co-relation queries the response was YES. [2024-06-20 17:23:11,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42318 conditions, 5137 events. 3172/5137 cut-off events. For 426361/426361 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 31911 event pairs, 648 based on Foata normal form. 4/5132 useless extension candidates. Maximal degree in co-relation 42179. Up to 4607 conditions per place. [2024-06-20 17:23:11,277 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 316 selfloop transitions, 85 changer transitions 0/406 dead transitions. [2024-06-20 17:23:11,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 406 transitions, 6385 flow [2024-06-20 17:23:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:11,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 17:23:11,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 17:23:11,279 INFO L175 Difference]: Start difference. First operand has 296 places, 373 transitions, 5010 flow. Second operand 8 states and 154 transitions. [2024-06-20 17:23:11,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 406 transitions, 6385 flow [2024-06-20 17:23:12,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 406 transitions, 6249 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-20 17:23:12,370 INFO L231 Difference]: Finished difference. Result has 301 places, 379 transitions, 5175 flow [2024-06-20 17:23:12,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4874, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5175, PETRI_PLACES=301, PETRI_TRANSITIONS=379} [2024-06-20 17:23:12,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-20 17:23:12,371 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 379 transitions, 5175 flow [2024-06-20 17:23:12,371 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) [2024-06-20 17:23:12,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:12,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:12,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:23:12,371 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:12,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:12,371 INFO L85 PathProgramCache]: Analyzing trace with hash 662515712, now seen corresponding path program 9 times [2024-06-20 17:23:12,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:12,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317696759] [2024-06-20 17:23:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:12,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:13,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:13,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317696759] [2024-06-20 17:23:13,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317696759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:13,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:13,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:13,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525436129] [2024-06-20 17:23:13,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:13,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:13,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:13,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:13,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:13,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:13,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 379 transitions, 5175 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) [2024-06-20 17:23:13,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:13,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:13,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:14,388 INFO L124 PetriNetUnfolderBase]: 3166/5129 cut-off events. [2024-06-20 17:23:14,388 INFO L125 PetriNetUnfolderBase]: For 427362/427362 co-relation queries the response was YES. [2024-06-20 17:23:14,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42308 conditions, 5129 events. 3166/5129 cut-off events. For 427362/427362 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 31923 event pairs, 653 based on Foata normal form. 2/5122 useless extension candidates. Maximal degree in co-relation 42168. Up to 4750 conditions per place. [2024-06-20 17:23:14,452 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 319 selfloop transitions, 77 changer transitions 0/401 dead transitions. [2024-06-20 17:23:14,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 401 transitions, 6092 flow [2024-06-20 17:23:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:23:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:23:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 17:23:14,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:23:14,453 INFO L175 Difference]: Start difference. First operand has 301 places, 379 transitions, 5175 flow. Second operand 10 states and 175 transitions. [2024-06-20 17:23:14,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 401 transitions, 6092 flow [2024-06-20 17:23:15,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 401 transitions, 5877 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-20 17:23:15,381 INFO L231 Difference]: Finished difference. Result has 307 places, 379 transitions, 5121 flow [2024-06-20 17:23:15,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4960, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5121, PETRI_PLACES=307, PETRI_TRANSITIONS=379} [2024-06-20 17:23:15,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-20 17:23:15,382 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 379 transitions, 5121 flow [2024-06-20 17:23:15,382 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) [2024-06-20 17:23:15,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:15,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:15,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:23:15,382 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:15,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:15,382 INFO L85 PathProgramCache]: Analyzing trace with hash 662961368, now seen corresponding path program 6 times [2024-06-20 17:23:15,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:15,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472276674] [2024-06-20 17:23:15,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:15,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:16,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:16,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472276674] [2024-06-20 17:23:16,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472276674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:16,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:16,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:16,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906765674] [2024-06-20 17:23:16,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:16,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:16,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:16,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:16,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:16,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:16,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 379 transitions, 5121 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) [2024-06-20 17:23:16,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:16,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:16,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:17,334 INFO L124 PetriNetUnfolderBase]: 3154/5108 cut-off events. [2024-06-20 17:23:17,334 INFO L125 PetriNetUnfolderBase]: For 431248/431248 co-relation queries the response was YES. [2024-06-20 17:23:17,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41755 conditions, 5108 events. 3154/5108 cut-off events. For 431248/431248 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 31703 event pairs, 637 based on Foata normal form. 4/5109 useless extension candidates. Maximal degree in co-relation 41614. Up to 4843 conditions per place. [2024-06-20 17:23:17,396 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 366 selfloop transitions, 26 changer transitions 0/397 dead transitions. [2024-06-20 17:23:17,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 397 transitions, 5983 flow [2024-06-20 17:23:17,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:17,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 17:23:17,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-20 17:23:17,397 INFO L175 Difference]: Start difference. First operand has 307 places, 379 transitions, 5121 flow. Second operand 8 states and 143 transitions. [2024-06-20 17:23:17,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 397 transitions, 5983 flow [2024-06-20 17:23:18,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 397 transitions, 5789 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 17:23:18,376 INFO L231 Difference]: Finished difference. Result has 308 places, 379 transitions, 4985 flow [2024-06-20 17:23:18,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4985, PETRI_PLACES=308, PETRI_TRANSITIONS=379} [2024-06-20 17:23:18,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-20 17:23:18,376 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 379 transitions, 4985 flow [2024-06-20 17:23:18,376 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) [2024-06-20 17:23:18,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:18,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:18,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:23:18,377 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:18,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:18,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1263395628, now seen corresponding path program 7 times [2024-06-20 17:23:18,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:18,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281121991] [2024-06-20 17:23:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:18,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:19,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:19,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281121991] [2024-06-20 17:23:19,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281121991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:19,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:19,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:19,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418248635] [2024-06-20 17:23:19,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:19,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:19,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:19,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:19,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:19,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:19,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 379 transitions, 4985 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) [2024-06-20 17:23:19,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:19,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:19,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:20,493 INFO L124 PetriNetUnfolderBase]: 3216/5196 cut-off events. [2024-06-20 17:23:20,494 INFO L125 PetriNetUnfolderBase]: For 453280/453280 co-relation queries the response was YES. [2024-06-20 17:23:20,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42715 conditions, 5196 events. 3216/5196 cut-off events. For 453280/453280 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 32283 event pairs, 639 based on Foata normal form. 4/5197 useless extension candidates. Maximal degree in co-relation 42573. Up to 4803 conditions per place. [2024-06-20 17:23:20,574 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 336 selfloop transitions, 75 changer transitions 0/416 dead transitions. [2024-06-20 17:23:20,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 416 transitions, 6262 flow [2024-06-20 17:23:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:20,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-20 17:23:20,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017421602787456 [2024-06-20 17:23:20,575 INFO L175 Difference]: Start difference. First operand has 308 places, 379 transitions, 4985 flow. Second operand 7 states and 144 transitions. [2024-06-20 17:23:20,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 416 transitions, 6262 flow [2024-06-20 17:23:21,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 416 transitions, 6170 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:23:21,770 INFO L231 Difference]: Finished difference. Result has 310 places, 390 transitions, 5339 flow [2024-06-20 17:23:21,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4899, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5339, PETRI_PLACES=310, PETRI_TRANSITIONS=390} [2024-06-20 17:23:21,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-20 17:23:21,771 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 390 transitions, 5339 flow [2024-06-20 17:23:21,771 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) [2024-06-20 17:23:21,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:21,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:21,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:23:21,771 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:21,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1692831684, now seen corresponding path program 10 times [2024-06-20 17:23:21,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:21,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748200967] [2024-06-20 17:23:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:21,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:22,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:22,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748200967] [2024-06-20 17:23:22,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748200967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:22,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:22,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:22,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040619292] [2024-06-20 17:23:22,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:22,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:22,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:22,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:22,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:22,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 390 transitions, 5339 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) [2024-06-20 17:23:22,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:22,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:22,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:23,726 INFO L124 PetriNetUnfolderBase]: 3210/5195 cut-off events. [2024-06-20 17:23:23,726 INFO L125 PetriNetUnfolderBase]: For 454756/454756 co-relation queries the response was YES. [2024-06-20 17:23:23,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42996 conditions, 5195 events. 3210/5195 cut-off events. For 454756/454756 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 32374 event pairs, 650 based on Foata normal form. 2/5188 useless extension candidates. Maximal degree in co-relation 42851. Up to 4758 conditions per place. [2024-06-20 17:23:23,792 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 340 selfloop transitions, 71 changer transitions 0/416 dead transitions. [2024-06-20 17:23:23,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 416 transitions, 6593 flow [2024-06-20 17:23:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-20 17:23:23,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:23:23,793 INFO L175 Difference]: Start difference. First operand has 310 places, 390 transitions, 5339 flow. Second operand 7 states and 140 transitions. [2024-06-20 17:23:23,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 416 transitions, 6593 flow [2024-06-20 17:23:25,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 416 transitions, 6436 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-20 17:23:25,142 INFO L231 Difference]: Finished difference. Result has 314 places, 390 transitions, 5338 flow [2024-06-20 17:23:25,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5182, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5338, PETRI_PLACES=314, PETRI_TRANSITIONS=390} [2024-06-20 17:23:25,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-20 17:23:25,143 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 390 transitions, 5338 flow [2024-06-20 17:23:25,143 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) [2024-06-20 17:23:25,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:25,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:25,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:23:25,143 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:25,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:25,143 INFO L85 PathProgramCache]: Analyzing trace with hash -478611980, now seen corresponding path program 8 times [2024-06-20 17:23:25,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:25,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658068207] [2024-06-20 17:23:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:25,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:25,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:25,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658068207] [2024-06-20 17:23:25,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658068207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:25,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:25,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:25,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903913759] [2024-06-20 17:23:25,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:25,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:25,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:25,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:25,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:25,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 390 transitions, 5338 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) [2024-06-20 17:23:25,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:25,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:25,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:27,097 INFO L124 PetriNetUnfolderBase]: 3198/5176 cut-off events. [2024-06-20 17:23:27,097 INFO L125 PetriNetUnfolderBase]: For 459267/459267 co-relation queries the response was YES. [2024-06-20 17:23:27,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42591 conditions, 5176 events. 3198/5176 cut-off events. For 459267/459267 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 32249 event pairs, 630 based on Foata normal form. 4/5177 useless extension candidates. Maximal degree in co-relation 42445. Up to 4862 conditions per place. [2024-06-20 17:23:27,163 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 361 selfloop transitions, 43 changer transitions 0/409 dead transitions. [2024-06-20 17:23:27,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 409 transitions, 6224 flow [2024-06-20 17:23:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:23:27,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:23:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-20 17:23:27,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-20 17:23:27,164 INFO L175 Difference]: Start difference. First operand has 314 places, 390 transitions, 5338 flow. Second operand 6 states and 121 transitions. [2024-06-20 17:23:27,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 409 transitions, 6224 flow [2024-06-20 17:23:28,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 409 transitions, 6056 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:28,412 INFO L231 Difference]: Finished difference. Result has 314 places, 390 transitions, 5284 flow [2024-06-20 17:23:28,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5170, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5284, PETRI_PLACES=314, PETRI_TRANSITIONS=390} [2024-06-20 17:23:28,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-20 17:23:28,413 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 390 transitions, 5284 flow [2024-06-20 17:23:28,413 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) [2024-06-20 17:23:28,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:28,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:28,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:23:28,413 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:28,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:28,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1491475524, now seen corresponding path program 11 times [2024-06-20 17:23:28,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:28,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8780234] [2024-06-20 17:23:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:28,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:29,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:29,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8780234] [2024-06-20 17:23:29,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8780234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:29,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:29,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:29,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136674834] [2024-06-20 17:23:29,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:29,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:29,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:29,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:29,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:29,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:29,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 390 transitions, 5284 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) [2024-06-20 17:23:29,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:29,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:29,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:30,378 INFO L124 PetriNetUnfolderBase]: 3192/5164 cut-off events. [2024-06-20 17:23:30,378 INFO L125 PetriNetUnfolderBase]: For 447373/447373 co-relation queries the response was YES. [2024-06-20 17:23:30,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42175 conditions, 5164 events. 3192/5164 cut-off events. For 447373/447373 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 32155 event pairs, 645 based on Foata normal form. 2/5157 useless extension candidates. Maximal degree in co-relation 42030. Up to 4737 conditions per place. [2024-06-20 17:23:30,441 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 332 selfloop transitions, 77 changer transitions 0/414 dead transitions. [2024-06-20 17:23:30,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 414 transitions, 6366 flow [2024-06-20 17:23:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-20 17:23:30,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-20 17:23:30,442 INFO L175 Difference]: Start difference. First operand has 314 places, 390 transitions, 5284 flow. Second operand 7 states and 138 transitions. [2024-06-20 17:23:30,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 414 transitions, 6366 flow [2024-06-20 17:23:31,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 414 transitions, 6250 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 17:23:31,554 INFO L231 Difference]: Finished difference. Result has 317 places, 390 transitions, 5334 flow [2024-06-20 17:23:31,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5168, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5334, PETRI_PLACES=317, PETRI_TRANSITIONS=390} [2024-06-20 17:23:31,554 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-20 17:23:31,555 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 390 transitions, 5334 flow [2024-06-20 17:23:31,555 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) [2024-06-20 17:23:31,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:31,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:31,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:23:31,555 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:31,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:31,555 INFO L85 PathProgramCache]: Analyzing trace with hash -237840720, now seen corresponding path program 9 times [2024-06-20 17:23:31,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:31,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496418998] [2024-06-20 17:23:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:31,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:32,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:32,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496418998] [2024-06-20 17:23:32,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496418998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:32,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:32,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:32,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385971456] [2024-06-20 17:23:32,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:32,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:32,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:32,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:32,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:32,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:32,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 390 transitions, 5334 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) [2024-06-20 17:23:32,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:32,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:32,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:33,494 INFO L124 PetriNetUnfolderBase]: 3212/5193 cut-off events. [2024-06-20 17:23:33,494 INFO L125 PetriNetUnfolderBase]: For 465167/465167 co-relation queries the response was YES. [2024-06-20 17:23:33,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42644 conditions, 5193 events. 3212/5193 cut-off events. For 465167/465167 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 32304 event pairs, 625 based on Foata normal form. 4/5188 useless extension candidates. Maximal degree in co-relation 42498. Up to 4629 conditions per place. [2024-06-20 17:23:33,553 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 311 selfloop transitions, 101 changer transitions 0/417 dead transitions. [2024-06-20 17:23:33,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 417 transitions, 6663 flow [2024-06-20 17:23:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-20 17:23:33,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:23:33,554 INFO L175 Difference]: Start difference. First operand has 317 places, 390 transitions, 5334 flow. Second operand 7 states and 140 transitions. [2024-06-20 17:23:33,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 417 transitions, 6663 flow [2024-06-20 17:23:34,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 417 transitions, 6462 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:23:34,776 INFO L231 Difference]: Finished difference. Result has 317 places, 393 transitions, 5427 flow [2024-06-20 17:23:34,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5137, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5427, PETRI_PLACES=317, PETRI_TRANSITIONS=393} [2024-06-20 17:23:34,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-20 17:23:34,777 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 393 transitions, 5427 flow [2024-06-20 17:23:34,777 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) [2024-06-20 17:23:34,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:34,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:34,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:23:34,777 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:34,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:34,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1698395874, now seen corresponding path program 12 times [2024-06-20 17:23:34,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:34,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090164371] [2024-06-20 17:23:34,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:34,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:35,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:35,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090164371] [2024-06-20 17:23:35,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090164371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:35,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:35,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:35,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593119162] [2024-06-20 17:23:35,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:35,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:35,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:35,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:35,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:35,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 393 transitions, 5427 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) [2024-06-20 17:23:35,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:35,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:35,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:36,730 INFO L124 PetriNetUnfolderBase]: 3206/5198 cut-off events. [2024-06-20 17:23:36,730 INFO L125 PetriNetUnfolderBase]: For 454015/454015 co-relation queries the response was YES. [2024-06-20 17:23:36,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42555 conditions, 5198 events. 3206/5198 cut-off events. For 454015/454015 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 32434 event pairs, 644 based on Foata normal form. 2/5197 useless extension candidates. Maximal degree in co-relation 42409. Up to 4863 conditions per place. [2024-06-20 17:23:36,803 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 368 selfloop transitions, 43 changer transitions 0/416 dead transitions. [2024-06-20 17:23:36,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 416 transitions, 6340 flow [2024-06-20 17:23:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 17:23:36,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-20 17:23:36,804 INFO L175 Difference]: Start difference. First operand has 317 places, 393 transitions, 5427 flow. Second operand 7 states and 136 transitions. [2024-06-20 17:23:36,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 416 transitions, 6340 flow [2024-06-20 17:23:38,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 416 transitions, 6060 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:38,136 INFO L231 Difference]: Finished difference. Result has 318 places, 393 transitions, 5252 flow [2024-06-20 17:23:38,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5252, PETRI_PLACES=318, PETRI_TRANSITIONS=393} [2024-06-20 17:23:38,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-20 17:23:38,137 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 393 transitions, 5252 flow [2024-06-20 17:23:38,137 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) [2024-06-20 17:23:38,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:38,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:38,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:23:38,137 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:38,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:38,138 INFO L85 PathProgramCache]: Analyzing trace with hash -491361350, now seen corresponding path program 10 times [2024-06-20 17:23:38,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:38,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158654366] [2024-06-20 17:23:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:38,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:38,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:38,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158654366] [2024-06-20 17:23:38,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158654366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:38,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:38,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:38,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863670985] [2024-06-20 17:23:38,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:38,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:38,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:38,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:38,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:38,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 393 transitions, 5252 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) [2024-06-20 17:23:38,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:38,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:38,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:39,970 INFO L124 PetriNetUnfolderBase]: 3226/5223 cut-off events. [2024-06-20 17:23:39,970 INFO L125 PetriNetUnfolderBase]: For 448123/448123 co-relation queries the response was YES. [2024-06-20 17:23:40,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42267 conditions, 5223 events. 3226/5223 cut-off events. For 448123/448123 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32594 event pairs, 643 based on Foata normal form. 4/5224 useless extension candidates. Maximal degree in co-relation 42122. Up to 4812 conditions per place. [2024-06-20 17:23:40,048 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 352 selfloop transitions, 62 changer transitions 0/419 dead transitions. [2024-06-20 17:23:40,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 419 transitions, 6415 flow [2024-06-20 17:23:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-20 17:23:40,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-20 17:23:40,050 INFO L175 Difference]: Start difference. First operand has 318 places, 393 transitions, 5252 flow. Second operand 7 states and 138 transitions. [2024-06-20 17:23:40,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 419 transitions, 6415 flow [2024-06-20 17:23:41,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 419 transitions, 6339 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:41,244 INFO L231 Difference]: Finished difference. Result has 320 places, 396 transitions, 5396 flow [2024-06-20 17:23:41,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5178, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5396, PETRI_PLACES=320, PETRI_TRANSITIONS=396} [2024-06-20 17:23:41,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-20 17:23:41,246 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 396 transitions, 5396 flow [2024-06-20 17:23:41,246 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) [2024-06-20 17:23:41,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:41,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:41,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:23:41,246 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:41,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1698158538, now seen corresponding path program 11 times [2024-06-20 17:23:41,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:41,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469191176] [2024-06-20 17:23:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:41,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:41,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:41,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469191176] [2024-06-20 17:23:41,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469191176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:41,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:41,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:41,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610173304] [2024-06-20 17:23:41,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:41,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:41,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:41,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:41,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:41,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:41,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 396 transitions, 5396 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) [2024-06-20 17:23:41,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:41,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:41,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:43,084 INFO L124 PetriNetUnfolderBase]: 3214/5218 cut-off events. [2024-06-20 17:23:43,084 INFO L125 PetriNetUnfolderBase]: For 437972/437972 co-relation queries the response was YES. [2024-06-20 17:23:43,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41974 conditions, 5218 events. 3214/5218 cut-off events. For 437972/437972 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 32661 event pairs, 645 based on Foata normal form. 4/5219 useless extension candidates. Maximal degree in co-relation 41828. Up to 4909 conditions per place. [2024-06-20 17:23:43,162 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 374 selfloop transitions, 34 changer transitions 0/413 dead transitions. [2024-06-20 17:23:43,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 413 transitions, 6282 flow [2024-06-20 17:23:43,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 17:23:43,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 17:23:43,163 INFO L175 Difference]: Start difference. First operand has 320 places, 396 transitions, 5396 flow. Second operand 7 states and 130 transitions. [2024-06-20 17:23:43,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 413 transitions, 6282 flow [2024-06-20 17:23:44,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 413 transitions, 6088 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-20 17:23:44,299 INFO L231 Difference]: Finished difference. Result has 320 places, 396 transitions, 5280 flow [2024-06-20 17:23:44,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5202, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5280, PETRI_PLACES=320, PETRI_TRANSITIONS=396} [2024-06-20 17:23:44,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-20 17:23:44,300 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 396 transitions, 5280 flow [2024-06-20 17:23:44,300 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) [2024-06-20 17:23:44,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:44,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:44,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:23:44,300 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:44,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1491729228, now seen corresponding path program 12 times [2024-06-20 17:23:44,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:44,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496377080] [2024-06-20 17:23:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:44,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:44,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:44,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496377080] [2024-06-20 17:23:44,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496377080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:44,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:44,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:44,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678861163] [2024-06-20 17:23:44,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:44,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:44,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:44,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:44,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:45,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:45,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 396 transitions, 5280 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) [2024-06-20 17:23:45,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:45,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:45,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:46,193 INFO L124 PetriNetUnfolderBase]: 3202/5184 cut-off events. [2024-06-20 17:23:46,193 INFO L125 PetriNetUnfolderBase]: For 415631/415631 co-relation queries the response was YES. [2024-06-20 17:23:46,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41072 conditions, 5184 events. 3202/5184 cut-off events. For 415631/415631 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 32379 event pairs, 637 based on Foata normal form. 4/5185 useless extension candidates. Maximal degree in co-relation 40927. Up to 4893 conditions per place. [2024-06-20 17:23:46,264 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 376 selfloop transitions, 32 changer transitions 0/413 dead transitions. [2024-06-20 17:23:46,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 413 transitions, 6172 flow [2024-06-20 17:23:46,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:46,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 17:23:46,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-20 17:23:46,265 INFO L175 Difference]: Start difference. First operand has 320 places, 396 transitions, 5280 flow. Second operand 7 states and 129 transitions. [2024-06-20 17:23:46,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 413 transitions, 6172 flow [2024-06-20 17:23:47,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 413 transitions, 6008 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 17:23:47,275 INFO L231 Difference]: Finished difference. Result has 320 places, 396 transitions, 5190 flow [2024-06-20 17:23:47,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5116, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5190, PETRI_PLACES=320, PETRI_TRANSITIONS=396} [2024-06-20 17:23:47,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-20 17:23:47,276 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 396 transitions, 5190 flow [2024-06-20 17:23:47,276 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) [2024-06-20 17:23:47,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:47,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:47,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:23:47,276 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:47,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:47,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1698149610, now seen corresponding path program 2 times [2024-06-20 17:23:47,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:47,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682139184] [2024-06-20 17:23:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:47,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:48,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:48,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682139184] [2024-06-20 17:23:48,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682139184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:48,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:48,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:48,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793067509] [2024-06-20 17:23:48,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:48,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:48,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:48,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:48,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:48,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:48,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 396 transitions, 5190 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) [2024-06-20 17:23:48,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:48,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:48,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:49,419 INFO L124 PetriNetUnfolderBase]: 3246/5245 cut-off events. [2024-06-20 17:23:49,420 INFO L125 PetriNetUnfolderBase]: For 435252/435252 co-relation queries the response was YES. [2024-06-20 17:23:49,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41302 conditions, 5245 events. 3246/5245 cut-off events. For 435252/435252 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 32725 event pairs, 636 based on Foata normal form. 12/5254 useless extension candidates. Maximal degree in co-relation 41158. Up to 4807 conditions per place. [2024-06-20 17:23:49,489 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 377 selfloop transitions, 41 changer transitions 0/423 dead transitions. [2024-06-20 17:23:49,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 423 transitions, 6222 flow [2024-06-20 17:23:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 17:23:49,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-20 17:23:49,491 INFO L175 Difference]: Start difference. First operand has 320 places, 396 transitions, 5190 flow. Second operand 7 states and 137 transitions. [2024-06-20 17:23:49,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 423 transitions, 6222 flow [2024-06-20 17:23:50,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 423 transitions, 6047 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 17:23:50,516 INFO L231 Difference]: Finished difference. Result has 320 places, 397 transitions, 5121 flow [2024-06-20 17:23:50,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5015, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5121, PETRI_PLACES=320, PETRI_TRANSITIONS=397} [2024-06-20 17:23:50,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-20 17:23:50,516 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 397 transitions, 5121 flow [2024-06-20 17:23:50,516 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) [2024-06-20 17:23:50,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:50,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:50,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:23:50,516 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:50,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:50,517 INFO L85 PathProgramCache]: Analyzing trace with hash -478603052, now seen corresponding path program 3 times [2024-06-20 17:23:50,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:50,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404142300] [2024-06-20 17:23:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:50,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:51,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:51,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404142300] [2024-06-20 17:23:51,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404142300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:51,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:51,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:51,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395487894] [2024-06-20 17:23:51,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:51,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:51,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:51,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:51,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:51,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:51,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 397 transitions, 5121 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) [2024-06-20 17:23:51,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:51,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:51,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:52,703 INFO L124 PetriNetUnfolderBase]: 3290/5336 cut-off events. [2024-06-20 17:23:52,703 INFO L125 PetriNetUnfolderBase]: For 436351/436351 co-relation queries the response was YES. [2024-06-20 17:23:52,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41740 conditions, 5336 events. 3290/5336 cut-off events. For 436351/436351 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 33593 event pairs, 547 based on Foata normal form. 12/5345 useless extension candidates. Maximal degree in co-relation 41597. Up to 4911 conditions per place. [2024-06-20 17:23:52,770 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 384 selfloop transitions, 35 changer transitions 0/424 dead transitions. [2024-06-20 17:23:52,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 424 transitions, 6139 flow [2024-06-20 17:23:52,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:23:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:23:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-20 17:23:52,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-20 17:23:52,771 INFO L175 Difference]: Start difference. First operand has 320 places, 397 transitions, 5121 flow. Second operand 6 states and 126 transitions. [2024-06-20 17:23:52,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 424 transitions, 6139 flow [2024-06-20 17:23:53,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 424 transitions, 6051 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:53,797 INFO L231 Difference]: Finished difference. Result has 321 places, 398 transitions, 5133 flow [2024-06-20 17:23:53,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5035, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5133, PETRI_PLACES=321, PETRI_TRANSITIONS=398} [2024-06-20 17:23:53,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-20 17:23:53,798 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 398 transitions, 5133 flow [2024-06-20 17:23:53,798 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) [2024-06-20 17:23:53,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:53,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:53,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:23:53,798 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:53,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:53,798 INFO L85 PathProgramCache]: Analyzing trace with hash -478155722, now seen corresponding path program 4 times [2024-06-20 17:23:53,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:53,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165242325] [2024-06-20 17:23:53,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:53,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:54,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:54,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165242325] [2024-06-20 17:23:54,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165242325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:54,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:54,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:54,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353270843] [2024-06-20 17:23:54,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:54,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:54,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:54,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:54,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:54,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:23:54,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 398 transitions, 5133 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) [2024-06-20 17:23:54,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:54,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:23:54,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:55,983 INFO L124 PetriNetUnfolderBase]: 3292/5346 cut-off events. [2024-06-20 17:23:55,983 INFO L125 PetriNetUnfolderBase]: For 414359/414359 co-relation queries the response was YES. [2024-06-20 17:23:56,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41381 conditions, 5346 events. 3292/5346 cut-off events. For 414359/414359 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 33636 event pairs, 539 based on Foata normal form. 8/5351 useless extension candidates. Maximal degree in co-relation 41237. Up to 4879 conditions per place. [2024-06-20 17:23:56,048 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 387 selfloop transitions, 38 changer transitions 0/430 dead transitions. [2024-06-20 17:23:56,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 430 transitions, 6227 flow [2024-06-20 17:23:56,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:56,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-20 17:23:56,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-20 17:23:56,050 INFO L175 Difference]: Start difference. First operand has 321 places, 398 transitions, 5133 flow. Second operand 7 states and 143 transitions. [2024-06-20 17:23:56,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 430 transitions, 6227 flow [2024-06-20 17:23:57,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 430 transitions, 6163 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 17:23:57,227 INFO L231 Difference]: Finished difference. Result has 324 places, 399 transitions, 5167 flow [2024-06-20 17:23:57,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5069, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5167, PETRI_PLACES=324, PETRI_TRANSITIONS=399} [2024-06-20 17:23:57,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-20 17:23:57,227 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 399 transitions, 5167 flow [2024-06-20 17:23:57,228 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) [2024-06-20 17:23:57,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:57,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:57,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:23:57,228 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:23:57,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash 467156018, now seen corresponding path program 1 times [2024-06-20 17:23:57,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:57,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207569894] [2024-06-20 17:23:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:58,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:58,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207569894] [2024-06-20 17:23:58,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207569894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:58,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:58,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:58,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173138694] [2024-06-20 17:23:58,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:58,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:58,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:58,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:58,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:58,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:23:58,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 399 transitions, 5167 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:23:58,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:58,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:23:58,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:59,643 INFO L124 PetriNetUnfolderBase]: 3276/5369 cut-off events. [2024-06-20 17:23:59,643 INFO L125 PetriNetUnfolderBase]: For 460072/460085 co-relation queries the response was YES. [2024-06-20 17:23:59,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42438 conditions, 5369 events. 3276/5369 cut-off events. For 460072/460085 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34310 event pairs, 612 based on Foata normal form. 11/5373 useless extension candidates. Maximal degree in co-relation 42293. Up to 4716 conditions per place. [2024-06-20 17:23:59,716 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 336 selfloop transitions, 56 changer transitions 0/438 dead transitions. [2024-06-20 17:23:59,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 438 transitions, 6297 flow [2024-06-20 17:23:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:23:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:23:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 17:23:59,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:23:59,718 INFO L175 Difference]: Start difference. First operand has 324 places, 399 transitions, 5167 flow. Second operand 9 states and 180 transitions. [2024-06-20 17:23:59,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 438 transitions, 6297 flow [2024-06-20 17:24:00,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 438 transitions, 6213 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 17:24:00,832 INFO L231 Difference]: Finished difference. Result has 328 places, 401 transitions, 5237 flow [2024-06-20 17:24:00,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5083, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5237, PETRI_PLACES=328, PETRI_TRANSITIONS=401} [2024-06-20 17:24:00,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-20 17:24:00,833 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 401 transitions, 5237 flow [2024-06-20 17:24:00,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:00,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:00,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:00,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:24:00,834 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:00,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:00,834 INFO L85 PathProgramCache]: Analyzing trace with hash 467216468, now seen corresponding path program 2 times [2024-06-20 17:24:00,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:00,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921036133] [2024-06-20 17:24:00,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:00,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:01,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:01,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921036133] [2024-06-20 17:24:01,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921036133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:01,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:01,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:01,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171968403] [2024-06-20 17:24:01,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:01,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:01,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:01,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:01,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:24:01,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 401 transitions, 5237 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:01,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:01,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:24:01,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:03,191 INFO L124 PetriNetUnfolderBase]: 3324/5441 cut-off events. [2024-06-20 17:24:03,191 INFO L125 PetriNetUnfolderBase]: For 472203/472227 co-relation queries the response was YES. [2024-06-20 17:24:03,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42939 conditions, 5441 events. 3324/5441 cut-off events. For 472203/472227 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 34730 event pairs, 643 based on Foata normal form. 10/5445 useless extension candidates. Maximal degree in co-relation 42793. Up to 4884 conditions per place. [2024-06-20 17:24:03,267 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 332 selfloop transitions, 57 changer transitions 0/435 dead transitions. [2024-06-20 17:24:03,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 435 transitions, 6186 flow [2024-06-20 17:24:03,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 17:24:03,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 17:24:03,269 INFO L175 Difference]: Start difference. First operand has 328 places, 401 transitions, 5237 flow. Second operand 9 states and 174 transitions. [2024-06-20 17:24:03,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 435 transitions, 6186 flow [2024-06-20 17:24:04,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 435 transitions, 6106 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:24:04,587 INFO L231 Difference]: Finished difference. Result has 332 places, 405 transitions, 5319 flow [2024-06-20 17:24:04,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5160, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5319, PETRI_PLACES=332, PETRI_TRANSITIONS=405} [2024-06-20 17:24:04,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-20 17:24:04,588 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 405 transitions, 5319 flow [2024-06-20 17:24:04,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:04,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:04,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:04,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:24:04,589 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:04,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:04,589 INFO L85 PathProgramCache]: Analyzing trace with hash 470012978, now seen corresponding path program 3 times [2024-06-20 17:24:04,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:04,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706098026] [2024-06-20 17:24:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:04,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:05,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:05,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706098026] [2024-06-20 17:24:05,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706098026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:05,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:05,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:05,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545816355] [2024-06-20 17:24:05,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:05,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:05,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:05,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:05,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:05,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:24:05,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 405 transitions, 5319 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:05,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:05,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:24:05,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:06,859 INFO L124 PetriNetUnfolderBase]: 3363/5506 cut-off events. [2024-06-20 17:24:06,860 INFO L125 PetriNetUnfolderBase]: For 483908/483908 co-relation queries the response was YES. [2024-06-20 17:24:06,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43651 conditions, 5506 events. 3363/5506 cut-off events. For 483908/483908 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 35296 event pairs, 651 based on Foata normal form. 12/5512 useless extension candidates. Maximal degree in co-relation 43503. Up to 4969 conditions per place. [2024-06-20 17:24:06,934 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 54 changer transitions 0/437 dead transitions. [2024-06-20 17:24:06,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 437 transitions, 6459 flow [2024-06-20 17:24:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 17:24:06,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-20 17:24:06,935 INFO L175 Difference]: Start difference. First operand has 332 places, 405 transitions, 5319 flow. Second operand 9 states and 172 transitions. [2024-06-20 17:24:06,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 437 transitions, 6459 flow [2024-06-20 17:24:08,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 437 transitions, 6365 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:24:08,307 INFO L231 Difference]: Finished difference. Result has 337 places, 409 transitions, 5451 flow [2024-06-20 17:24:08,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5225, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5451, PETRI_PLACES=337, PETRI_TRANSITIONS=409} [2024-06-20 17:24:08,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-20 17:24:08,308 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 409 transitions, 5451 flow [2024-06-20 17:24:08,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:08,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:08,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:08,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:24:08,308 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:08,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:08,308 INFO L85 PathProgramCache]: Analyzing trace with hash 662792542, now seen corresponding path program 4 times [2024-06-20 17:24:08,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:08,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641753813] [2024-06-20 17:24:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:08,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:09,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:09,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641753813] [2024-06-20 17:24:09,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641753813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:09,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:09,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:09,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278543923] [2024-06-20 17:24:09,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:09,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:09,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:09,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:09,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:09,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:24:09,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 409 transitions, 5451 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:09,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:09,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:24:09,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:10,943 INFO L124 PetriNetUnfolderBase]: 3421/5600 cut-off events. [2024-06-20 17:24:10,943 INFO L125 PetriNetUnfolderBase]: For 521000/521024 co-relation queries the response was YES. [2024-06-20 17:24:11,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44759 conditions, 5600 events. 3421/5600 cut-off events. For 521000/521024 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 35960 event pairs, 675 based on Foata normal form. 18/5612 useless extension candidates. Maximal degree in co-relation 44609. Up to 5080 conditions per place. [2024-06-20 17:24:11,041 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 355 selfloop transitions, 35 changer transitions 0/436 dead transitions. [2024-06-20 17:24:11,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 436 transitions, 6417 flow [2024-06-20 17:24:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:11,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:24:11,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 17:24:11,043 INFO L175 Difference]: Start difference. First operand has 337 places, 409 transitions, 5451 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:24:11,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 436 transitions, 6417 flow [2024-06-20 17:24:12,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 436 transitions, 6298 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:24:12,362 INFO L231 Difference]: Finished difference. Result has 339 places, 411 transitions, 5459 flow [2024-06-20 17:24:12,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5459, PETRI_PLACES=339, PETRI_TRANSITIONS=411} [2024-06-20 17:24:12,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-20 17:24:12,362 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 411 transitions, 5459 flow [2024-06-20 17:24:12,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:12,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:12,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:12,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:24:12,363 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:12,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:12,363 INFO L85 PathProgramCache]: Analyzing trace with hash 662977240, now seen corresponding path program 1 times [2024-06-20 17:24:12,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:12,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844163006] [2024-06-20 17:24:12,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:12,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:13,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:13,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844163006] [2024-06-20 17:24:13,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844163006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:13,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:13,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:13,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832079032] [2024-06-20 17:24:13,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:13,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:13,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:13,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:13,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:13,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:24:13,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 411 transitions, 5459 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) [2024-06-20 17:24:13,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:13,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:24:13,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:14,650 INFO L124 PetriNetUnfolderBase]: 3557/5747 cut-off events. [2024-06-20 17:24:14,650 INFO L125 PetriNetUnfolderBase]: For 477754/477754 co-relation queries the response was YES. [2024-06-20 17:24:14,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45855 conditions, 5747 events. 3557/5747 cut-off events. For 477754/477754 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 36327 event pairs, 700 based on Foata normal form. 2/5746 useless extension candidates. Maximal degree in co-relation 45704. Up to 5468 conditions per place. [2024-06-20 17:24:14,736 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 397 selfloop transitions, 28 changer transitions 0/430 dead transitions. [2024-06-20 17:24:14,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 430 transitions, 6407 flow [2024-06-20 17:24:14,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:24:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:24:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:24:14,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 17:24:14,738 INFO L175 Difference]: Start difference. First operand has 339 places, 411 transitions, 5459 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:24:14,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 430 transitions, 6407 flow [2024-06-20 17:24:16,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 430 transitions, 6330 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:24:16,038 INFO L231 Difference]: Finished difference. Result has 340 places, 413 transitions, 5491 flow [2024-06-20 17:24:16,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5382, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5491, PETRI_PLACES=340, PETRI_TRANSITIONS=413} [2024-06-20 17:24:16,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-20 17:24:16,038 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 413 transitions, 5491 flow [2024-06-20 17:24:16,038 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) [2024-06-20 17:24:16,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:16,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:16,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:24:16,039 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:16,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:16,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1263379756, now seen corresponding path program 2 times [2024-06-20 17:24:16,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:16,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160949250] [2024-06-20 17:24:16,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:16,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:16,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:16,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160949250] [2024-06-20 17:24:16,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160949250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:16,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:16,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:16,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955445378] [2024-06-20 17:24:16,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:16,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:16,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:16,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:16,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:17,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:24:17,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 413 transitions, 5491 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) [2024-06-20 17:24:17,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:17,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:24:17,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:18,297 INFO L124 PetriNetUnfolderBase]: 3565/5759 cut-off events. [2024-06-20 17:24:18,297 INFO L125 PetriNetUnfolderBase]: For 487856/487856 co-relation queries the response was YES. [2024-06-20 17:24:18,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46018 conditions, 5759 events. 3565/5759 cut-off events. For 487856/487856 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 36386 event pairs, 702 based on Foata normal form. 2/5758 useless extension candidates. Maximal degree in co-relation 45866. Up to 5472 conditions per place. [2024-06-20 17:24:18,373 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 396 selfloop transitions, 28 changer transitions 0/429 dead transitions. [2024-06-20 17:24:18,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 429 transitions, 6431 flow [2024-06-20 17:24:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:24:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:24:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-20 17:24:18,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 17:24:18,374 INFO L175 Difference]: Start difference. First operand has 340 places, 413 transitions, 5491 flow. Second operand 6 states and 112 transitions. [2024-06-20 17:24:18,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 429 transitions, 6431 flow [2024-06-20 17:24:19,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 429 transitions, 6338 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 17:24:19,523 INFO L231 Difference]: Finished difference. Result has 340 places, 415 transitions, 5515 flow [2024-06-20 17:24:19,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5398, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5515, PETRI_PLACES=340, PETRI_TRANSITIONS=415} [2024-06-20 17:24:19,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-20 17:24:19,523 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 415 transitions, 5515 flow [2024-06-20 17:24:19,524 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) [2024-06-20 17:24:19,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:19,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:19,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:24:19,524 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:19,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:19,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1491465604, now seen corresponding path program 5 times [2024-06-20 17:24:19,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:19,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588480560] [2024-06-20 17:24:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:19,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:20,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:20,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588480560] [2024-06-20 17:24:20,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588480560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:20,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:20,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:20,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544014853] [2024-06-20 17:24:20,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:20,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:20,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:20,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:20,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:20,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:24:20,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 415 transitions, 5515 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:20,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:20,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:24:20,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:22,031 INFO L124 PetriNetUnfolderBase]: 3429/5616 cut-off events. [2024-06-20 17:24:22,031 INFO L125 PetriNetUnfolderBase]: For 518364/518364 co-relation queries the response was YES. [2024-06-20 17:24:22,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44369 conditions, 5616 events. 3429/5616 cut-off events. For 518364/518364 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 36147 event pairs, 647 based on Foata normal form. 20/5630 useless extension candidates. Maximal degree in co-relation 44216. Up to 5056 conditions per place. [2024-06-20 17:24:22,099 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 364 selfloop transitions, 38 changer transitions 0/448 dead transitions. [2024-06-20 17:24:22,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 448 transitions, 6509 flow [2024-06-20 17:24:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:24:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:24:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-20 17:24:22,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4969512195121951 [2024-06-20 17:24:22,100 INFO L175 Difference]: Start difference. First operand has 340 places, 415 transitions, 5515 flow. Second operand 8 states and 163 transitions. [2024-06-20 17:24:22,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 448 transitions, 6509 flow [2024-06-20 17:24:23,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 448 transitions, 6406 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 17:24:23,309 INFO L231 Difference]: Finished difference. Result has 344 places, 416 transitions, 5528 flow [2024-06-20 17:24:23,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5414, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5528, PETRI_PLACES=344, PETRI_TRANSITIONS=416} [2024-06-20 17:24:23,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-20 17:24:23,310 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 416 transitions, 5528 flow [2024-06-20 17:24:23,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:23,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:23,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:23,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:24:23,310 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:23,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1254808876, now seen corresponding path program 3 times [2024-06-20 17:24:23,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:23,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476329223] [2024-06-20 17:24:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:23,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:24,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:24,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476329223] [2024-06-20 17:24:24,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476329223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:24,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:24,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:24,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020178597] [2024-06-20 17:24:24,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:24,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:24,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:24,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:24,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:24,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:24:24,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 416 transitions, 5528 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) [2024-06-20 17:24:24,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:24,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:24:24,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:25,382 INFO L124 PetriNetUnfolderBase]: 3573/5791 cut-off events. [2024-06-20 17:24:25,382 INFO L125 PetriNetUnfolderBase]: For 460172/460172 co-relation queries the response was YES. [2024-06-20 17:24:25,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45363 conditions, 5791 events. 3573/5791 cut-off events. For 460172/460172 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 36756 event pairs, 717 based on Foata normal form. 2/5790 useless extension candidates. Maximal degree in co-relation 45209. Up to 5518 conditions per place. [2024-06-20 17:24:25,469 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 409 selfloop transitions, 15 changer transitions 0/429 dead transitions. [2024-06-20 17:24:25,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 429 transitions, 6456 flow [2024-06-20 17:24:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:24:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:24:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 17:24:25,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-20 17:24:25,470 INFO L175 Difference]: Start difference. First operand has 344 places, 416 transitions, 5528 flow. Second operand 6 states and 107 transitions. [2024-06-20 17:24:25,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 429 transitions, 6456 flow [2024-06-20 17:24:26,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 429 transitions, 6376 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 17:24:27,004 INFO L231 Difference]: Finished difference. Result has 344 places, 418 transitions, 5537 flow [2024-06-20 17:24:27,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5448, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5537, PETRI_PLACES=344, PETRI_TRANSITIONS=418} [2024-06-20 17:24:27,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-20 17:24:27,005 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 418 transitions, 5537 flow [2024-06-20 17:24:27,005 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) [2024-06-20 17:24:27,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:27,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:27,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:24:27,005 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:27,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:27,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1255105794, now seen corresponding path program 1 times [2024-06-20 17:24:27,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:27,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222597538] [2024-06-20 17:24:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:27,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:27,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:27,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222597538] [2024-06-20 17:24:27,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222597538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:27,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:27,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:27,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590959982] [2024-06-20 17:24:27,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:27,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:27,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:27,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:24:27,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 418 transitions, 5537 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) [2024-06-20 17:24:27,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:27,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:24:27,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:29,480 INFO L124 PetriNetUnfolderBase]: 3570/5775 cut-off events. [2024-06-20 17:24:29,481 INFO L125 PetriNetUnfolderBase]: For 462409/462409 co-relation queries the response was YES. [2024-06-20 17:24:29,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45222 conditions, 5775 events. 3570/5775 cut-off events. For 462409/462409 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 36567 event pairs, 718 based on Foata normal form. 1/5773 useless extension candidates. Maximal degree in co-relation 45067. Up to 5472 conditions per place. [2024-06-20 17:24:29,575 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 394 selfloop transitions, 36 changer transitions 0/435 dead transitions. [2024-06-20 17:24:29,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 435 transitions, 6455 flow [2024-06-20 17:24:29,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:24:29,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:24:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-20 17:24:29,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483739837398374 [2024-06-20 17:24:29,576 INFO L175 Difference]: Start difference. First operand has 344 places, 418 transitions, 5537 flow. Second operand 6 states and 119 transitions. [2024-06-20 17:24:29,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 435 transitions, 6455 flow [2024-06-20 17:24:30,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 435 transitions, 6358 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 17:24:30,877 INFO L231 Difference]: Finished difference. Result has 346 places, 418 transitions, 5530 flow [2024-06-20 17:24:30,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5440, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5530, PETRI_PLACES=346, PETRI_TRANSITIONS=418} [2024-06-20 17:24:30,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-20 17:24:30,878 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 418 transitions, 5530 flow [2024-06-20 17:24:30,878 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) [2024-06-20 17:24:30,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:30,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:30,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:24:30,878 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:30,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1255105546, now seen corresponding path program 4 times [2024-06-20 17:24:30,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:30,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874944371] [2024-06-20 17:24:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:30,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:31,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:31,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874944371] [2024-06-20 17:24:31,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874944371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:31,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:31,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:31,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180414035] [2024-06-20 17:24:31,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:31,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:31,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:31,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:31,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:31,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:24:31,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 418 transitions, 5530 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) [2024-06-20 17:24:31,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:31,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:24:31,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:33,014 INFO L124 PetriNetUnfolderBase]: 3565/5766 cut-off events. [2024-06-20 17:24:33,014 INFO L125 PetriNetUnfolderBase]: For 468206/468206 co-relation queries the response was YES. [2024-06-20 17:24:33,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45084 conditions, 5766 events. 3565/5766 cut-off events. For 468206/468206 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 36502 event pairs, 705 based on Foata normal form. 2/5765 useless extension candidates. Maximal degree in co-relation 44928. Up to 5465 conditions per place. [2024-06-20 17:24:33,095 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 394 selfloop transitions, 35 changer transitions 0/434 dead transitions. [2024-06-20 17:24:33,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 434 transitions, 6486 flow [2024-06-20 17:24:33,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:24:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:24:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 17:24:33,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-20 17:24:33,097 INFO L175 Difference]: Start difference. First operand has 346 places, 418 transitions, 5530 flow. Second operand 6 states and 113 transitions. [2024-06-20 17:24:33,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 434 transitions, 6486 flow [2024-06-20 17:24:34,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 434 transitions, 6383 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:24:34,283 INFO L231 Difference]: Finished difference. Result has 346 places, 420 transitions, 5567 flow [2024-06-20 17:24:34,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5429, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5567, PETRI_PLACES=346, PETRI_TRANSITIONS=420} [2024-06-20 17:24:34,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-20 17:24:34,283 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 420 transitions, 5567 flow [2024-06-20 17:24:34,283 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) [2024-06-20 17:24:34,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:34,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:34,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:24:34,284 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:34,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:34,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1970064286, now seen corresponding path program 1 times [2024-06-20 17:24:34,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:34,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105943917] [2024-06-20 17:24:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:34,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:35,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:35,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105943917] [2024-06-20 17:24:35,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105943917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:35,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:35,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:35,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988349250] [2024-06-20 17:24:35,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:35,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:35,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:35,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:35,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:24:35,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 420 transitions, 5567 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) [2024-06-20 17:24:35,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:35,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:24:35,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:36,634 INFO L124 PetriNetUnfolderBase]: 3591/5812 cut-off events. [2024-06-20 17:24:36,634 INFO L125 PetriNetUnfolderBase]: For 466975/466975 co-relation queries the response was YES. [2024-06-20 17:24:36,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45579 conditions, 5812 events. 3591/5812 cut-off events. For 466975/466975 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 36904 event pairs, 712 based on Foata normal form. 2/5811 useless extension candidates. Maximal degree in co-relation 45423. Up to 5393 conditions per place. [2024-06-20 17:24:36,718 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 387 selfloop transitions, 66 changer transitions 0/458 dead transitions. [2024-06-20 17:24:36,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 458 transitions, 6959 flow [2024-06-20 17:24:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:24:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:24:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-20 17:24:36,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-20 17:24:36,721 INFO L175 Difference]: Start difference. First operand has 346 places, 420 transitions, 5567 flow. Second operand 10 states and 186 transitions. [2024-06-20 17:24:36,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 458 transitions, 6959 flow [2024-06-20 17:24:38,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 458 transitions, 6845 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 17:24:38,089 INFO L231 Difference]: Finished difference. Result has 353 places, 428 transitions, 5821 flow [2024-06-20 17:24:38,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5455, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5821, PETRI_PLACES=353, PETRI_TRANSITIONS=428} [2024-06-20 17:24:38,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-20 17:24:38,089 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 428 transitions, 5821 flow [2024-06-20 17:24:38,090 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) [2024-06-20 17:24:38,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:38,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:38,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:24:38,090 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:38,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:38,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1970154651, now seen corresponding path program 1 times [2024-06-20 17:24:38,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:38,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534959752] [2024-06-20 17:24:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:38,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:38,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:38,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534959752] [2024-06-20 17:24:38,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534959752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:38,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:38,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:38,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245908283] [2024-06-20 17:24:38,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:38,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:38,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:38,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:24:38,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 428 transitions, 5821 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) [2024-06-20 17:24:38,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:38,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:24:38,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:40,410 INFO L124 PetriNetUnfolderBase]: 3643/5886 cut-off events. [2024-06-20 17:24:40,411 INFO L125 PetriNetUnfolderBase]: For 498179/498179 co-relation queries the response was YES. [2024-06-20 17:24:40,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47557 conditions, 5886 events. 3643/5886 cut-off events. For 498179/498179 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 37364 event pairs, 712 based on Foata normal form. 4/5887 useless extension candidates. Maximal degree in co-relation 47399. Up to 5311 conditions per place. [2024-06-20 17:24:40,488 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 384 selfloop transitions, 76 changer transitions 0/465 dead transitions. [2024-06-20 17:24:40,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 465 transitions, 7257 flow [2024-06-20 17:24:40,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 17:24:40,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 17:24:40,489 INFO L175 Difference]: Start difference. First operand has 353 places, 428 transitions, 5821 flow. Second operand 9 states and 174 transitions. [2024-06-20 17:24:40,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 465 transitions, 7257 flow [2024-06-20 17:24:42,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 465 transitions, 7072 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-20 17:24:42,014 INFO L231 Difference]: Finished difference. Result has 356 places, 434 transitions, 5968 flow [2024-06-20 17:24:42,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5636, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5968, PETRI_PLACES=356, PETRI_TRANSITIONS=434} [2024-06-20 17:24:42,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-20 17:24:42,015 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 434 transitions, 5968 flow [2024-06-20 17:24:42,015 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) [2024-06-20 17:24:42,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:42,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:42,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:24:42,015 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:42,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash 307582331, now seen corresponding path program 2 times [2024-06-20 17:24:42,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:42,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183174870] [2024-06-20 17:24:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:42,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:42,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:42,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183174870] [2024-06-20 17:24:42,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183174870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:42,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:42,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:42,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267214008] [2024-06-20 17:24:42,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:42,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:42,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:42,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:42,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:42,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:24:42,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 434 transitions, 5968 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) [2024-06-20 17:24:42,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:42,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:24:42,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:44,431 INFO L124 PetriNetUnfolderBase]: 3695/5958 cut-off events. [2024-06-20 17:24:44,431 INFO L125 PetriNetUnfolderBase]: For 530707/530707 co-relation queries the response was YES. [2024-06-20 17:24:44,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49317 conditions, 5958 events. 3695/5958 cut-off events. For 530707/530707 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 37797 event pairs, 720 based on Foata normal form. 4/5959 useless extension candidates. Maximal degree in co-relation 49157. Up to 5482 conditions per place. [2024-06-20 17:24:44,666 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 399 selfloop transitions, 69 changer transitions 0/473 dead transitions. [2024-06-20 17:24:44,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 473 transitions, 7465 flow [2024-06-20 17:24:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:24:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:24:44,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-20 17:24:44,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-20 17:24:44,667 INFO L175 Difference]: Start difference. First operand has 356 places, 434 transitions, 5968 flow. Second operand 11 states and 200 transitions. [2024-06-20 17:24:44,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 473 transitions, 7465 flow [2024-06-20 17:24:45,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 473 transitions, 7267 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-20 17:24:45,834 INFO L231 Difference]: Finished difference. Result has 362 places, 440 transitions, 6100 flow [2024-06-20 17:24:45,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5806, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6100, PETRI_PLACES=362, PETRI_TRANSITIONS=440} [2024-06-20 17:24:45,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-20 17:24:45,835 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 440 transitions, 6100 flow [2024-06-20 17:24:45,835 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) [2024-06-20 17:24:45,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:45,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:45,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:24:45,835 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:45,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:45,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1673776334, now seen corresponding path program 2 times [2024-06-20 17:24:45,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:45,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839678848] [2024-06-20 17:24:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:45,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:46,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:46,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839678848] [2024-06-20 17:24:46,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839678848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:46,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:46,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:46,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964607478] [2024-06-20 17:24:46,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:46,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:46,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:46,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:46,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:46,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:24:46,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 440 transitions, 6100 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) [2024-06-20 17:24:46,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:46,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:24:46,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:48,356 INFO L124 PetriNetUnfolderBase]: 3705/5970 cut-off events. [2024-06-20 17:24:48,356 INFO L125 PetriNetUnfolderBase]: For 532392/532392 co-relation queries the response was YES. [2024-06-20 17:24:48,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49482 conditions, 5970 events. 3705/5970 cut-off events. For 532392/532392 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37869 event pairs, 729 based on Foata normal form. 2/5969 useless extension candidates. Maximal degree in co-relation 49320. Up to 5636 conditions per place. [2024-06-20 17:24:48,444 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 417 selfloop transitions, 44 changer transitions 0/466 dead transitions. [2024-06-20 17:24:48,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 466 transitions, 7199 flow [2024-06-20 17:24:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:48,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:24:48,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:24:48,445 INFO L175 Difference]: Start difference. First operand has 362 places, 440 transitions, 6100 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:24:48,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 466 transitions, 7199 flow [2024-06-20 17:24:50,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 466 transitions, 7047 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-20 17:24:50,128 INFO L231 Difference]: Finished difference. Result has 364 places, 444 transitions, 6139 flow [2024-06-20 17:24:50,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5948, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6139, PETRI_PLACES=364, PETRI_TRANSITIONS=444} [2024-06-20 17:24:50,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-20 17:24:50,129 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 444 transitions, 6139 flow [2024-06-20 17:24:50,129 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) [2024-06-20 17:24:50,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:50,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:50,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:24:50,129 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:50,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1847015699, now seen corresponding path program 3 times [2024-06-20 17:24:50,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:50,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948043011] [2024-06-20 17:24:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:50,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:50,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:50,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948043011] [2024-06-20 17:24:50,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948043011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:50,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:50,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:50,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977689186] [2024-06-20 17:24:50,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:50,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:50,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:50,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:50,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:50,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:24:50,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 444 transitions, 6139 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) [2024-06-20 17:24:50,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:50,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:24:50,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:52,541 INFO L124 PetriNetUnfolderBase]: 3693/5956 cut-off events. [2024-06-20 17:24:52,541 INFO L125 PetriNetUnfolderBase]: For 533877/533877 co-relation queries the response was YES. [2024-06-20 17:24:52,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49017 conditions, 5956 events. 3693/5956 cut-off events. For 533877/533877 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 37767 event pairs, 714 based on Foata normal form. 4/5957 useless extension candidates. Maximal degree in co-relation 48853. Up to 5488 conditions per place. [2024-06-20 17:24:52,633 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 401 selfloop transitions, 67 changer transitions 0/473 dead transitions. [2024-06-20 17:24:52,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 473 transitions, 7260 flow [2024-06-20 17:24:52,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 17:24:52,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:24:52,634 INFO L175 Difference]: Start difference. First operand has 364 places, 444 transitions, 6139 flow. Second operand 9 states and 171 transitions. [2024-06-20 17:24:52,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 473 transitions, 7260 flow [2024-06-20 17:24:54,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 473 transitions, 7073 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-20 17:24:54,425 INFO L231 Difference]: Finished difference. Result has 366 places, 444 transitions, 6092 flow [2024-06-20 17:24:54,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5952, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6092, PETRI_PLACES=366, PETRI_TRANSITIONS=444} [2024-06-20 17:24:54,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-20 17:24:54,425 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 444 transitions, 6092 flow [2024-06-20 17:24:54,426 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) [2024-06-20 17:24:54,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:54,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:54,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:24:54,426 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:54,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:54,426 INFO L85 PathProgramCache]: Analyzing trace with hash -477666355, now seen corresponding path program 4 times [2024-06-20 17:24:54,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:54,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351744951] [2024-06-20 17:24:54,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:54,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:55,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:55,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351744951] [2024-06-20 17:24:55,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351744951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:55,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:55,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:55,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973821328] [2024-06-20 17:24:55,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:55,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:55,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:55,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:55,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:55,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:24:55,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 444 transitions, 6092 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) [2024-06-20 17:24:55,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:55,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:24:55,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:56,864 INFO L124 PetriNetUnfolderBase]: 3745/6023 cut-off events. [2024-06-20 17:24:56,864 INFO L125 PetriNetUnfolderBase]: For 560103/560103 co-relation queries the response was YES. [2024-06-20 17:24:56,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50188 conditions, 6023 events. 3745/6023 cut-off events. For 560103/560103 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 38171 event pairs, 728 based on Foata normal form. 4/6024 useless extension candidates. Maximal degree in co-relation 50023. Up to 5641 conditions per place. [2024-06-20 17:24:56,955 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 424 selfloop transitions, 46 changer transitions 0/475 dead transitions. [2024-06-20 17:24:56,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 475 transitions, 7507 flow [2024-06-20 17:24:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:24:56,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 17:24:56,956 INFO L175 Difference]: Start difference. First operand has 366 places, 444 transitions, 6092 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:24:56,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 475 transitions, 7507 flow [2024-06-20 17:24:58,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 475 transitions, 7373 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:24:58,427 INFO L231 Difference]: Finished difference. Result has 367 places, 450 transitions, 6218 flow [2024-06-20 17:24:58,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5958, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6218, PETRI_PLACES=367, PETRI_TRANSITIONS=450} [2024-06-20 17:24:58,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-20 17:24:58,427 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 450 transitions, 6218 flow [2024-06-20 17:24:58,427 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) [2024-06-20 17:24:58,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:58,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:58,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:24:58,428 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:24:58,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:58,428 INFO L85 PathProgramCache]: Analyzing trace with hash -470041998, now seen corresponding path program 1 times [2024-06-20 17:24:58,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:58,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085506633] [2024-06-20 17:24:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:58,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:59,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:59,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085506633] [2024-06-20 17:24:59,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085506633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:59,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:59,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:59,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992294361] [2024-06-20 17:24:59,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:59,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:59,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:59,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:59,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:59,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:24:59,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 450 transitions, 6218 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) [2024-06-20 17:24:59,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:59,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:24:59,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:00,769 INFO L124 PetriNetUnfolderBase]: 3755/6040 cut-off events. [2024-06-20 17:25:00,770 INFO L125 PetriNetUnfolderBase]: For 563887/563887 co-relation queries the response was YES. [2024-06-20 17:25:00,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50438 conditions, 6040 events. 3755/6040 cut-off events. For 563887/563887 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 38280 event pairs, 728 based on Foata normal form. 2/6039 useless extension candidates. Maximal degree in co-relation 50272. Up to 5717 conditions per place. [2024-06-20 17:25:00,871 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 432 selfloop transitions, 42 changer transitions 0/479 dead transitions. [2024-06-20 17:25:00,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 479 transitions, 7426 flow [2024-06-20 17:25:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:25:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:25:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:25:00,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 17:25:00,872 INFO L175 Difference]: Start difference. First operand has 367 places, 450 transitions, 6218 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:25:00,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 479 transitions, 7426 flow [2024-06-20 17:25:02,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 479 transitions, 7307 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 17:25:02,560 INFO L231 Difference]: Finished difference. Result has 372 places, 461 transitions, 6426 flow [2024-06-20 17:25:02,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6099, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6426, PETRI_PLACES=372, PETRI_TRANSITIONS=461} [2024-06-20 17:25:02,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-20 17:25:02,560 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 461 transitions, 6426 flow [2024-06-20 17:25:02,560 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) [2024-06-20 17:25:02,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:02,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:02,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:25:02,560 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:02,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:02,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1715202757, now seen corresponding path program 5 times [2024-06-20 17:25:02,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:02,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438014286] [2024-06-20 17:25:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:02,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:03,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:03,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438014286] [2024-06-20 17:25:03,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438014286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:03,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:03,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:03,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211260678] [2024-06-20 17:25:03,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:03,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:03,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:03,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:03,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:03,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:25:03,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 461 transitions, 6426 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) [2024-06-20 17:25:03,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:03,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:25:03,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:04,926 INFO L124 PetriNetUnfolderBase]: 3775/6068 cut-off events. [2024-06-20 17:25:04,926 INFO L125 PetriNetUnfolderBase]: For 588745/588745 co-relation queries the response was YES. [2024-06-20 17:25:04,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51560 conditions, 6068 events. 3775/6068 cut-off events. For 588745/588745 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 38554 event pairs, 725 based on Foata normal form. 4/6069 useless extension candidates. Maximal degree in co-relation 51390. Up to 5745 conditions per place. [2024-06-20 17:25:05,013 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 445 selfloop transitions, 35 changer transitions 0/485 dead transitions. [2024-06-20 17:25:05,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 485 transitions, 7572 flow [2024-06-20 17:25:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 17:25:05,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 17:25:05,014 INFO L175 Difference]: Start difference. First operand has 372 places, 461 transitions, 6426 flow. Second operand 9 states and 160 transitions. [2024-06-20 17:25:05,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 485 transitions, 7572 flow [2024-06-20 17:25:07,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 485 transitions, 7423 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-20 17:25:07,087 INFO L231 Difference]: Finished difference. Result has 377 places, 464 transitions, 6429 flow [2024-06-20 17:25:07,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6277, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6429, PETRI_PLACES=377, PETRI_TRANSITIONS=464} [2024-06-20 17:25:07,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-20 17:25:07,088 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 464 transitions, 6429 flow [2024-06-20 17:25:07,088 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) [2024-06-20 17:25:07,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:07,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:07,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:25:07,088 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:07,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:07,089 INFO L85 PathProgramCache]: Analyzing trace with hash -477666510, now seen corresponding path program 3 times [2024-06-20 17:25:07,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:07,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685827037] [2024-06-20 17:25:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:07,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:08,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:08,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685827037] [2024-06-20 17:25:08,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685827037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:08,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:08,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:08,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943121991] [2024-06-20 17:25:08,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:08,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:08,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:08,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:08,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:08,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:25:08,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 464 transitions, 6429 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) [2024-06-20 17:25:08,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:08,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:25:08,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:09,578 INFO L124 PetriNetUnfolderBase]: 3785/6078 cut-off events. [2024-06-20 17:25:09,579 INFO L125 PetriNetUnfolderBase]: For 592794/592794 co-relation queries the response was YES. [2024-06-20 17:25:09,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51742 conditions, 6078 events. 3785/6078 cut-off events. For 592794/592794 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 38523 event pairs, 734 based on Foata normal form. 2/6077 useless extension candidates. Maximal degree in co-relation 51571. Up to 5785 conditions per place. [2024-06-20 17:25:09,672 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 451 selfloop transitions, 31 changer transitions 0/487 dead transitions. [2024-06-20 17:25:09,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 487 transitions, 7572 flow [2024-06-20 17:25:09,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:25:09,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-20 17:25:09,673 INFO L175 Difference]: Start difference. First operand has 377 places, 464 transitions, 6429 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:25:09,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 487 transitions, 7572 flow [2024-06-20 17:25:11,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 487 transitions, 7442 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-20 17:25:11,584 INFO L231 Difference]: Finished difference. Result has 379 places, 468 transitions, 6472 flow [2024-06-20 17:25:11,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6299, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6472, PETRI_PLACES=379, PETRI_TRANSITIONS=468} [2024-06-20 17:25:11,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-20 17:25:11,584 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 468 transitions, 6472 flow [2024-06-20 17:25:11,584 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) [2024-06-20 17:25:11,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:11,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:11,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:25:11,584 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:11,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:11,585 INFO L85 PathProgramCache]: Analyzing trace with hash -477660775, now seen corresponding path program 6 times [2024-06-20 17:25:11,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:11,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453695636] [2024-06-20 17:25:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:11,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:12,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:12,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453695636] [2024-06-20 17:25:12,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453695636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:12,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:12,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:12,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535041566] [2024-06-20 17:25:12,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:12,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:12,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:12,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:25:12,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 468 transitions, 6472 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) [2024-06-20 17:25:12,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:12,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:25:12,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:13,909 INFO L124 PetriNetUnfolderBase]: 3773/6076 cut-off events. [2024-06-20 17:25:13,909 INFO L125 PetriNetUnfolderBase]: For 594847/594847 co-relation queries the response was YES. [2024-06-20 17:25:13,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51224 conditions, 6076 events. 3773/6076 cut-off events. For 594847/594847 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 38682 event pairs, 729 based on Foata normal form. 4/6077 useless extension candidates. Maximal degree in co-relation 51052. Up to 5677 conditions per place. [2024-06-20 17:25:14,003 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 439 selfloop transitions, 48 changer transitions 0/492 dead transitions. [2024-06-20 17:25:14,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 492 transitions, 7603 flow [2024-06-20 17:25:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:25:14,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 17:25:14,004 INFO L175 Difference]: Start difference. First operand has 379 places, 468 transitions, 6472 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:25:14,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 492 transitions, 7603 flow [2024-06-20 17:25:15,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 492 transitions, 7456 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-20 17:25:15,892 INFO L231 Difference]: Finished difference. Result has 384 places, 468 transitions, 6427 flow [2024-06-20 17:25:15,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6325, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6427, PETRI_PLACES=384, PETRI_TRANSITIONS=468} [2024-06-20 17:25:15,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-20 17:25:15,892 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 468 transitions, 6427 flow [2024-06-20 17:25:15,892 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) [2024-06-20 17:25:15,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:15,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:15,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:25:15,892 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:15,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:15,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1586418428, now seen corresponding path program 4 times [2024-06-20 17:25:15,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:15,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213523483] [2024-06-20 17:25:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:15,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:16,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:16,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213523483] [2024-06-20 17:25:16,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213523483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:16,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:16,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:16,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998381975] [2024-06-20 17:25:16,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:16,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:16,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:16,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:16,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:16,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:25:16,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 468 transitions, 6427 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) [2024-06-20 17:25:16,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:16,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:25:16,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:18,423 INFO L124 PetriNetUnfolderBase]: 3807/6106 cut-off events. [2024-06-20 17:25:18,423 INFO L125 PetriNetUnfolderBase]: For 612094/612094 co-relation queries the response was YES. [2024-06-20 17:25:18,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52104 conditions, 6106 events. 3807/6106 cut-off events. For 612094/612094 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 38746 event pairs, 723 based on Foata normal form. 2/6099 useless extension candidates. Maximal degree in co-relation 51931. Up to 5394 conditions per place. [2024-06-20 17:25:18,519 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 348 selfloop transitions, 169 changer transitions 0/522 dead transitions. [2024-06-20 17:25:18,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 522 transitions, 8415 flow [2024-06-20 17:25:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:25:18,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:25:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-20 17:25:18,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-20 17:25:18,520 INFO L175 Difference]: Start difference. First operand has 384 places, 468 transitions, 6427 flow. Second operand 11 states and 208 transitions. [2024-06-20 17:25:18,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 522 transitions, 8415 flow [2024-06-20 17:25:20,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 522 transitions, 8294 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 17:25:20,613 INFO L231 Difference]: Finished difference. Result has 389 places, 488 transitions, 7175 flow [2024-06-20 17:25:20,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6306, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7175, PETRI_PLACES=389, PETRI_TRANSITIONS=488} [2024-06-20 17:25:20,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-20 17:25:20,614 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 488 transitions, 7175 flow [2024-06-20 17:25:20,614 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) [2024-06-20 17:25:20,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:20,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:20,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:25:20,614 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:20,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:20,614 INFO L85 PathProgramCache]: Analyzing trace with hash -294028494, now seen corresponding path program 5 times [2024-06-20 17:25:20,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:20,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217788134] [2024-06-20 17:25:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:20,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:21,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:21,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217788134] [2024-06-20 17:25:21,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217788134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:21,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:21,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:21,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011205608] [2024-06-20 17:25:21,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:21,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:21,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:21,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:21,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:21,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:25:21,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 488 transitions, 7175 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) [2024-06-20 17:25:21,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:21,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:25:21,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:23,442 INFO L124 PetriNetUnfolderBase]: 3857/6171 cut-off events. [2024-06-20 17:25:23,442 INFO L125 PetriNetUnfolderBase]: For 663639/663639 co-relation queries the response was YES. [2024-06-20 17:25:23,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55336 conditions, 6171 events. 3857/6171 cut-off events. For 663639/663639 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 39115 event pairs, 738 based on Foata normal form. 2/6160 useless extension candidates. Maximal degree in co-relation 55160. Up to 5340 conditions per place. [2024-06-20 17:25:23,539 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 318 selfloop transitions, 215 changer transitions 0/538 dead transitions. [2024-06-20 17:25:23,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 538 transitions, 9809 flow [2024-06-20 17:25:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:25:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:25:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-20 17:25:23,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 17:25:23,540 INFO L175 Difference]: Start difference. First operand has 389 places, 488 transitions, 7175 flow. Second operand 11 states and 205 transitions. [2024-06-20 17:25:23,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 538 transitions, 9809 flow [2024-06-20 17:25:25,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 538 transitions, 9413 flow, removed 125 selfloop flow, removed 6 redundant places. [2024-06-20 17:25:25,768 INFO L231 Difference]: Finished difference. Result has 394 places, 508 transitions, 7882 flow [2024-06-20 17:25:25,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6849, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7882, PETRI_PLACES=394, PETRI_TRANSITIONS=508} [2024-06-20 17:25:25,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-20 17:25:25,769 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 508 transitions, 7882 flow [2024-06-20 17:25:25,769 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) [2024-06-20 17:25:25,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:25,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:25,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:25:25,769 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:25,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:25,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1301408923, now seen corresponding path program 7 times [2024-06-20 17:25:25,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:25,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587891719] [2024-06-20 17:25:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:25,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:26,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:26,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587891719] [2024-06-20 17:25:26,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587891719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:26,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:26,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:26,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080301392] [2024-06-20 17:25:26,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:26,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:26,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:26,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:26,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:26,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:25:26,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 508 transitions, 7882 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) [2024-06-20 17:25:26,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:26,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:25:26,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:28,282 INFO L124 PetriNetUnfolderBase]: 3933/6290 cut-off events. [2024-06-20 17:25:28,282 INFO L125 PetriNetUnfolderBase]: For 726982/726982 co-relation queries the response was YES. [2024-06-20 17:25:28,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58328 conditions, 6290 events. 3933/6290 cut-off events. For 726982/726982 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 39971 event pairs, 704 based on Foata normal form. 4/6285 useless extension candidates. Maximal degree in co-relation 58150. Up to 5196 conditions per place. [2024-06-20 17:25:28,371 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 369 selfloop transitions, 175 changer transitions 0/549 dead transitions. [2024-06-20 17:25:28,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 549 transitions, 9902 flow [2024-06-20 17:25:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 17:25:28,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-20 17:25:28,372 INFO L175 Difference]: Start difference. First operand has 394 places, 508 transitions, 7882 flow. Second operand 9 states and 177 transitions. [2024-06-20 17:25:28,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 549 transitions, 9902 flow [2024-06-20 17:25:30,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 549 transitions, 9632 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-20 17:25:30,643 INFO L231 Difference]: Finished difference. Result has 398 places, 517 transitions, 8284 flow [2024-06-20 17:25:30,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7628, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8284, PETRI_PLACES=398, PETRI_TRANSITIONS=517} [2024-06-20 17:25:30,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-20 17:25:30,643 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 517 transitions, 8284 flow [2024-06-20 17:25:30,643 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) [2024-06-20 17:25:30,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:30,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:30,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:25:30,644 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:30,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash -207633199, now seen corresponding path program 8 times [2024-06-20 17:25:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:30,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043322694] [2024-06-20 17:25:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:31,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:31,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043322694] [2024-06-20 17:25:31,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043322694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:31,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:31,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:31,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727875820] [2024-06-20 17:25:31,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:31,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:31,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:31,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:31,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:31,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:25:31,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 517 transitions, 8284 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) [2024-06-20 17:25:31,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:31,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:25:31,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:33,157 INFO L124 PetriNetUnfolderBase]: 4017/6424 cut-off events. [2024-06-20 17:25:33,157 INFO L125 PetriNetUnfolderBase]: For 777760/777760 co-relation queries the response was YES. [2024-06-20 17:25:33,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60783 conditions, 6424 events. 4017/6424 cut-off events. For 777760/777760 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 40937 event pairs, 706 based on Foata normal form. 4/6419 useless extension candidates. Maximal degree in co-relation 60604. Up to 5260 conditions per place. [2024-06-20 17:25:33,259 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 368 selfloop transitions, 184 changer transitions 0/557 dead transitions. [2024-06-20 17:25:33,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 557 transitions, 10512 flow [2024-06-20 17:25:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 17:25:33,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-20 17:25:33,260 INFO L175 Difference]: Start difference. First operand has 398 places, 517 transitions, 8284 flow. Second operand 9 states and 177 transitions. [2024-06-20 17:25:33,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 557 transitions, 10512 flow [2024-06-20 17:25:35,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 557 transitions, 10206 flow, removed 99 selfloop flow, removed 4 redundant places. [2024-06-20 17:25:35,907 INFO L231 Difference]: Finished difference. Result has 403 places, 526 transitions, 8664 flow [2024-06-20 17:25:35,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8050, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8664, PETRI_PLACES=403, PETRI_TRANSITIONS=526} [2024-06-20 17:25:35,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-20 17:25:35,907 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 526 transitions, 8664 flow [2024-06-20 17:25:35,908 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) [2024-06-20 17:25:35,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:35,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:35,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:25:35,908 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:35,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:35,909 INFO L85 PathProgramCache]: Analyzing trace with hash -207187729, now seen corresponding path program 9 times [2024-06-20 17:25:35,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:35,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374342964] [2024-06-20 17:25:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:36,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:36,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374342964] [2024-06-20 17:25:36,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374342964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:36,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:36,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:36,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392401461] [2024-06-20 17:25:36,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:36,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:36,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:36,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:36,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:36,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:25:36,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 526 transitions, 8664 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) [2024-06-20 17:25:36,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:36,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:25:36,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:38,480 INFO L124 PetriNetUnfolderBase]: 4005/6401 cut-off events. [2024-06-20 17:25:38,480 INFO L125 PetriNetUnfolderBase]: For 768812/768812 co-relation queries the response was YES. [2024-06-20 17:25:38,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60509 conditions, 6401 events. 4005/6401 cut-off events. For 768812/768812 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 40772 event pairs, 718 based on Foata normal form. 4/6402 useless extension candidates. Maximal degree in co-relation 60328. Up to 6038 conditions per place. [2024-06-20 17:25:38,587 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 498 selfloop transitions, 46 changer transitions 0/549 dead transitions. [2024-06-20 17:25:38,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 549 transitions, 9860 flow [2024-06-20 17:25:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:38,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:25:38,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 17:25:38,588 INFO L175 Difference]: Start difference. First operand has 403 places, 526 transitions, 8664 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:25:38,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 549 transitions, 9860 flow [2024-06-20 17:25:42,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 549 transitions, 9516 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-20 17:25:42,091 INFO L231 Difference]: Finished difference. Result has 408 places, 526 transitions, 8418 flow [2024-06-20 17:25:42,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8320, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8418, PETRI_PLACES=408, PETRI_TRANSITIONS=526} [2024-06-20 17:25:42,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-20 17:25:42,091 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 526 transitions, 8418 flow [2024-06-20 17:25:42,091 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) [2024-06-20 17:25:42,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:42,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:42,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:25:42,092 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:42,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1939737340, now seen corresponding path program 6 times [2024-06-20 17:25:42,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:42,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44349997] [2024-06-20 17:25:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:42,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:42,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:43,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44349997] [2024-06-20 17:25:43,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44349997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:43,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:43,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:43,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266890710] [2024-06-20 17:25:43,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:43,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:43,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:43,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:43,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:43,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:25:43,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 526 transitions, 8418 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) [2024-06-20 17:25:43,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:43,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:25:43,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:44,784 INFO L124 PetriNetUnfolderBase]: 3999/6388 cut-off events. [2024-06-20 17:25:44,785 INFO L125 PetriNetUnfolderBase]: For 759913/759913 co-relation queries the response was YES. [2024-06-20 17:25:44,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59620 conditions, 6388 events. 3999/6388 cut-off events. For 759913/759913 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 40672 event pairs, 756 based on Foata normal form. 2/6381 useless extension candidates. Maximal degree in co-relation 59438. Up to 5790 conditions per place. [2024-06-20 17:25:44,887 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 433 selfloop transitions, 120 changer transitions 0/558 dead transitions. [2024-06-20 17:25:44,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 558 transitions, 9966 flow [2024-06-20 17:25:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:25:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:25:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 17:25:44,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-20 17:25:44,888 INFO L175 Difference]: Start difference. First operand has 408 places, 526 transitions, 8418 flow. Second operand 10 states and 188 transitions. [2024-06-20 17:25:44,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 558 transitions, 9966 flow [2024-06-20 17:25:48,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 558 transitions, 9779 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 17:25:48,272 INFO L231 Difference]: Finished difference. Result has 410 places, 528 transitions, 8545 flow [2024-06-20 17:25:48,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8231, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8545, PETRI_PLACES=410, PETRI_TRANSITIONS=528} [2024-06-20 17:25:48,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-20 17:25:48,272 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 528 transitions, 8545 flow [2024-06-20 17:25:48,272 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) [2024-06-20 17:25:48,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:48,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:48,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:25:48,272 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:48,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:48,273 INFO L85 PathProgramCache]: Analyzing trace with hash 47000623, now seen corresponding path program 10 times [2024-06-20 17:25:48,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:48,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850335376] [2024-06-20 17:25:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:48,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:49,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:49,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850335376] [2024-06-20 17:25:49,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850335376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:49,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:49,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:49,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417022597] [2024-06-20 17:25:49,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:49,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:49,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:49,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:49,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:25:49,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 528 transitions, 8545 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) [2024-06-20 17:25:49,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:49,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:25:49,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:50,755 INFO L124 PetriNetUnfolderBase]: 3987/6376 cut-off events. [2024-06-20 17:25:50,756 INFO L125 PetriNetUnfolderBase]: For 764469/764469 co-relation queries the response was YES. [2024-06-20 17:25:50,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59401 conditions, 6376 events. 3987/6376 cut-off events. For 764469/764469 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 40638 event pairs, 718 based on Foata normal form. 4/6371 useless extension candidates. Maximal degree in co-relation 59217. Up to 5236 conditions per place. [2024-06-20 17:25:50,862 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 386 selfloop transitions, 170 changer transitions 0/561 dead transitions. [2024-06-20 17:25:50,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 561 transitions, 10491 flow [2024-06-20 17:25:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:50,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-20 17:25:50,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-20 17:25:50,863 INFO L175 Difference]: Start difference. First operand has 410 places, 528 transitions, 8545 flow. Second operand 9 states and 179 transitions. [2024-06-20 17:25:50,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 561 transitions, 10491 flow [2024-06-20 17:25:53,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 561 transitions, 10128 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-20 17:25:53,925 INFO L231 Difference]: Finished difference. Result has 411 places, 528 transitions, 8528 flow [2024-06-20 17:25:53,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8182, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8528, PETRI_PLACES=411, PETRI_TRANSITIONS=528} [2024-06-20 17:25:53,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-20 17:25:53,925 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 528 transitions, 8528 flow [2024-06-20 17:25:53,925 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) [2024-06-20 17:25:53,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:53,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:53,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:25:53,925 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:53,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:53,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1943552355, now seen corresponding path program 11 times [2024-06-20 17:25:53,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:53,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657487748] [2024-06-20 17:25:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:53,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:54,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:54,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657487748] [2024-06-20 17:25:54,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657487748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:54,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:54,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:54,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013809889] [2024-06-20 17:25:54,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:54,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:54,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:54,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:54,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:54,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:25:54,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 528 transitions, 8528 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) [2024-06-20 17:25:54,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:54,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:25:54,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:56,627 INFO L124 PetriNetUnfolderBase]: 4039/6450 cut-off events. [2024-06-20 17:25:56,628 INFO L125 PetriNetUnfolderBase]: For 804082/804082 co-relation queries the response was YES. [2024-06-20 17:25:56,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60945 conditions, 6450 events. 4039/6450 cut-off events. For 804082/804082 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 41182 event pairs, 718 based on Foata normal form. 4/6445 useless extension candidates. Maximal degree in co-relation 60761. Up to 5794 conditions per place. [2024-06-20 17:25:56,734 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 451 selfloop transitions, 111 changer transitions 0/567 dead transitions. [2024-06-20 17:25:56,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 567 transitions, 10345 flow [2024-06-20 17:25:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:25:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:25:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-20 17:25:56,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-20 17:25:56,735 INFO L175 Difference]: Start difference. First operand has 411 places, 528 transitions, 8528 flow. Second operand 11 states and 201 transitions. [2024-06-20 17:25:56,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 567 transitions, 10345 flow [2024-06-20 17:25:59,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 567 transitions, 9800 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-20 17:25:59,885 INFO L231 Difference]: Finished difference. Result has 414 places, 534 transitions, 8427 flow [2024-06-20 17:25:59,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8043, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8427, PETRI_PLACES=414, PETRI_TRANSITIONS=534} [2024-06-20 17:25:59,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-20 17:25:59,885 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 534 transitions, 8427 flow [2024-06-20 17:25:59,885 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) [2024-06-20 17:25:59,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:59,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:59,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:25:59,885 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:59,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:59,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1943546775, now seen corresponding path program 12 times [2024-06-20 17:25:59,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:59,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084054213] [2024-06-20 17:25:59,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:59,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:00,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:00,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084054213] [2024-06-20 17:26:00,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084054213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:00,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:00,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:00,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62410835] [2024-06-20 17:26:00,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:00,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:00,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:00,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:00,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:00,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:26:00,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 534 transitions, 8427 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) [2024-06-20 17:26:00,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:00,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:26:00,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:02,534 INFO L124 PetriNetUnfolderBase]: 4027/6454 cut-off events. [2024-06-20 17:26:02,534 INFO L125 PetriNetUnfolderBase]: For 789732/789732 co-relation queries the response was YES. [2024-06-20 17:26:02,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59839 conditions, 6454 events. 4027/6454 cut-off events. For 789732/789732 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 41389 event pairs, 704 based on Foata normal form. 4/6449 useless extension candidates. Maximal degree in co-relation 59654. Up to 5786 conditions per place. [2024-06-20 17:26:02,642 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 449 selfloop transitions, 109 changer transitions 0/563 dead transitions. [2024-06-20 17:26:02,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 563 transitions, 9792 flow [2024-06-20 17:26:02,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:02,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 17:26:02,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-20 17:26:02,643 INFO L175 Difference]: Start difference. First operand has 414 places, 534 transitions, 8427 flow. Second operand 9 states and 172 transitions. [2024-06-20 17:26:02,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 563 transitions, 9792 flow [2024-06-20 17:26:05,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 563 transitions, 9556 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-20 17:26:05,867 INFO L231 Difference]: Finished difference. Result has 416 places, 534 transitions, 8415 flow [2024-06-20 17:26:05,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8191, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8415, PETRI_PLACES=416, PETRI_TRANSITIONS=534} [2024-06-20 17:26:05,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-20 17:26:05,868 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 534 transitions, 8415 flow [2024-06-20 17:26:05,868 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) [2024-06-20 17:26:05,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:05,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:05,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:26:05,868 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:05,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:05,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1943546620, now seen corresponding path program 7 times [2024-06-20 17:26:05,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:05,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219792839] [2024-06-20 17:26:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:05,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:06,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:06,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219792839] [2024-06-20 17:26:06,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219792839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:06,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:06,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:06,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708723538] [2024-06-20 17:26:06,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:06,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:06,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:06,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:06,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:06,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:26:06,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 534 transitions, 8415 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) [2024-06-20 17:26:06,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:06,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:26:06,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:08,698 INFO L124 PetriNetUnfolderBase]: 4037/6448 cut-off events. [2024-06-20 17:26:08,698 INFO L125 PetriNetUnfolderBase]: For 793438/793438 co-relation queries the response was YES. [2024-06-20 17:26:08,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60202 conditions, 6448 events. 4037/6448 cut-off events. For 793438/793438 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 41122 event pairs, 762 based on Foata normal form. 2/6441 useless extension candidates. Maximal degree in co-relation 60015. Up to 6046 conditions per place. [2024-06-20 17:26:08,803 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 485 selfloop transitions, 68 changer transitions 0/558 dead transitions. [2024-06-20 17:26:08,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 558 transitions, 9720 flow [2024-06-20 17:26:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:08,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:26:08,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:26:08,804 INFO L175 Difference]: Start difference. First operand has 416 places, 534 transitions, 8415 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:26:08,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 558 transitions, 9720 flow [2024-06-20 17:26:12,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 558 transitions, 9502 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:26:12,764 INFO L231 Difference]: Finished difference. Result has 417 places, 538 transitions, 8456 flow [2024-06-20 17:26:12,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8197, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8456, PETRI_PLACES=417, PETRI_TRANSITIONS=538} [2024-06-20 17:26:12,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-20 17:26:12,765 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 538 transitions, 8456 flow [2024-06-20 17:26:12,765 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) [2024-06-20 17:26:12,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:12,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:12,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:26:12,765 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:12,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:12,765 INFO L85 PathProgramCache]: Analyzing trace with hash -928574225, now seen corresponding path program 13 times [2024-06-20 17:26:12,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:12,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397721013] [2024-06-20 17:26:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:12,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:13,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:13,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397721013] [2024-06-20 17:26:13,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397721013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:13,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:13,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:13,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438877059] [2024-06-20 17:26:13,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:13,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:13,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:13,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:13,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:13,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:26:13,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 538 transitions, 8456 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) [2024-06-20 17:26:13,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:13,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:26:13,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:15,336 INFO L124 PetriNetUnfolderBase]: 4121/6577 cut-off events. [2024-06-20 17:26:15,336 INFO L125 PetriNetUnfolderBase]: For 857642/857642 co-relation queries the response was YES. [2024-06-20 17:26:15,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62188 conditions, 6577 events. 4121/6577 cut-off events. For 857642/857642 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42130 event pairs, 714 based on Foata normal form. 4/6572 useless extension candidates. Maximal degree in co-relation 62000. Up to 5765 conditions per place. [2024-06-20 17:26:15,434 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 439 selfloop transitions, 132 changer transitions 0/576 dead transitions. [2024-06-20 17:26:15,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 576 transitions, 10483 flow [2024-06-20 17:26:15,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 17:26:15,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-20 17:26:15,435 INFO L175 Difference]: Start difference. First operand has 417 places, 538 transitions, 8456 flow. Second operand 9 states and 172 transitions. [2024-06-20 17:26:15,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 576 transitions, 10483 flow [2024-06-20 17:26:18,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 576 transitions, 10298 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 17:26:18,628 INFO L231 Difference]: Finished difference. Result has 421 places, 547 transitions, 8822 flow [2024-06-20 17:26:18,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8271, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8822, PETRI_PLACES=421, PETRI_TRANSITIONS=547} [2024-06-20 17:26:18,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-20 17:26:18,629 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 547 transitions, 8822 flow [2024-06-20 17:26:18,629 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) [2024-06-20 17:26:18,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:18,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:18,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:26:18,629 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:18,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:18,629 INFO L85 PathProgramCache]: Analyzing trace with hash -928574380, now seen corresponding path program 8 times [2024-06-20 17:26:18,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:18,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797590695] [2024-06-20 17:26:18,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:18,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:19,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:19,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797590695] [2024-06-20 17:26:19,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797590695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:19,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:19,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:19,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792530756] [2024-06-20 17:26:19,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:19,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:19,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:19,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:19,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:19,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:26:19,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 547 transitions, 8822 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) [2024-06-20 17:26:19,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:19,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:26:19,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:21,519 INFO L124 PetriNetUnfolderBase]: 4131/6593 cut-off events. [2024-06-20 17:26:21,519 INFO L125 PetriNetUnfolderBase]: For 865499/865499 co-relation queries the response was YES. [2024-06-20 17:26:21,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62932 conditions, 6593 events. 4131/6593 cut-off events. For 865499/865499 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42202 event pairs, 780 based on Foata normal form. 2/6586 useless extension candidates. Maximal degree in co-relation 62742. Up to 6151 conditions per place. [2024-06-20 17:26:21,620 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 485 selfloop transitions, 80 changer transitions 0/570 dead transitions. [2024-06-20 17:26:21,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 570 transitions, 10168 flow [2024-06-20 17:26:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 17:26:21,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 17:26:21,621 INFO L175 Difference]: Start difference. First operand has 421 places, 547 transitions, 8822 flow. Second operand 9 states and 160 transitions. [2024-06-20 17:26:21,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 570 transitions, 10168 flow [2024-06-20 17:26:25,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 570 transitions, 9989 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-20 17:26:25,534 INFO L231 Difference]: Finished difference. Result has 426 places, 551 transitions, 8914 flow [2024-06-20 17:26:25,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8643, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8914, PETRI_PLACES=426, PETRI_TRANSITIONS=551} [2024-06-20 17:26:25,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-20 17:26:25,535 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 551 transitions, 8914 flow [2024-06-20 17:26:25,535 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) [2024-06-20 17:26:25,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:25,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:25,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:26:25,535 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:25,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:25,535 INFO L85 PathProgramCache]: Analyzing trace with hash -20317864, now seen corresponding path program 9 times [2024-06-20 17:26:25,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:25,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592529693] [2024-06-20 17:26:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:25,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:26,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:26,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592529693] [2024-06-20 17:26:26,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592529693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:26,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:26,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:26,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582953643] [2024-06-20 17:26:26,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:26,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:26,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:26,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:26,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:26,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:26:26,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 551 transitions, 8914 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) [2024-06-20 17:26:26,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:26,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:26:26,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:28,308 INFO L124 PetriNetUnfolderBase]: 4144/6612 cut-off events. [2024-06-20 17:26:28,308 INFO L125 PetriNetUnfolderBase]: For 877803/877803 co-relation queries the response was YES. [2024-06-20 17:26:28,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63390 conditions, 6612 events. 4144/6612 cut-off events. For 877803/877803 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42339 event pairs, 776 based on Foata normal form. 1/6604 useless extension candidates. Maximal degree in co-relation 63198. Up to 6214 conditions per place. [2024-06-20 17:26:28,406 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 514 selfloop transitions, 72 changer transitions 0/591 dead transitions. [2024-06-20 17:26:28,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 591 transitions, 10789 flow [2024-06-20 17:26:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:26:28,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-20 17:26:28,407 INFO L175 Difference]: Start difference. First operand has 426 places, 551 transitions, 8914 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:26:28,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 591 transitions, 10789 flow [2024-06-20 17:26:32,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 591 transitions, 10519 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-20 17:26:32,607 INFO L231 Difference]: Finished difference. Result has 430 places, 575 transitions, 9326 flow [2024-06-20 17:26:32,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8691, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9326, PETRI_PLACES=430, PETRI_TRANSITIONS=575} [2024-06-20 17:26:32,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-20 17:26:32,608 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 575 transitions, 9326 flow [2024-06-20 17:26:32,608 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) [2024-06-20 17:26:32,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:32,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:32,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:26:32,608 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:32,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:32,609 INFO L85 PathProgramCache]: Analyzing trace with hash -936848435, now seen corresponding path program 14 times [2024-06-20 17:26:32,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:32,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51332839] [2024-06-20 17:26:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:32,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:33,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:33,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51332839] [2024-06-20 17:26:33,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51332839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:33,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:33,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:33,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823961984] [2024-06-20 17:26:33,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:33,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:33,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:33,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:33,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:33,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:26:33,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 575 transitions, 9326 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) [2024-06-20 17:26:33,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:33,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:26:33,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:35,400 INFO L124 PetriNetUnfolderBase]: 4164/6660 cut-off events. [2024-06-20 17:26:35,400 INFO L125 PetriNetUnfolderBase]: For 911276/911276 co-relation queries the response was YES. [2024-06-20 17:26:35,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64114 conditions, 6660 events. 4164/6660 cut-off events. For 911276/911276 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 42824 event pairs, 720 based on Foata normal form. 4/6655 useless extension candidates. Maximal degree in co-relation 63919. Up to 5813 conditions per place. [2024-06-20 17:26:35,503 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 467 selfloop transitions, 142 changer transitions 0/614 dead transitions. [2024-06-20 17:26:35,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 614 transitions, 11453 flow [2024-06-20 17:26:35,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:26:35,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:26:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-20 17:26:35,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567627494456763 [2024-06-20 17:26:35,504 INFO L175 Difference]: Start difference. First operand has 430 places, 575 transitions, 9326 flow. Second operand 11 states and 206 transitions. [2024-06-20 17:26:35,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 614 transitions, 11453 flow [2024-06-20 17:26:39,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 614 transitions, 11232 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-20 17:26:39,311 INFO L231 Difference]: Finished difference. Result has 438 places, 578 transitions, 9545 flow [2024-06-20 17:26:39,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9170, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9545, PETRI_PLACES=438, PETRI_TRANSITIONS=578} [2024-06-20 17:26:39,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-20 17:26:39,312 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 578 transitions, 9545 flow [2024-06-20 17:26:39,312 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) [2024-06-20 17:26:39,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:39,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:39,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:26:39,312 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:39,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:39,312 INFO L85 PathProgramCache]: Analyzing trace with hash 394805588, now seen corresponding path program 10 times [2024-06-20 17:26:39,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:39,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310734127] [2024-06-20 17:26:39,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:39,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:40,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:40,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310734127] [2024-06-20 17:26:40,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310734127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:40,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:40,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:40,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630514140] [2024-06-20 17:26:40,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:40,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:40,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:40,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:40,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:40,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:26:40,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 578 transitions, 9545 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) [2024-06-20 17:26:40,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:40,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:26:40,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:42,289 INFO L124 PetriNetUnfolderBase]: 4161/6642 cut-off events. [2024-06-20 17:26:42,289 INFO L125 PetriNetUnfolderBase]: For 906517/906517 co-relation queries the response was YES. [2024-06-20 17:26:42,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64333 conditions, 6642 events. 4161/6642 cut-off events. For 906517/906517 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 42592 event pairs, 788 based on Foata normal form. 1/6634 useless extension candidates. Maximal degree in co-relation 64137. Up to 6254 conditions per place. [2024-06-20 17:26:42,392 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 531 selfloop transitions, 62 changer transitions 0/598 dead transitions. [2024-06-20 17:26:42,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 598 transitions, 10791 flow [2024-06-20 17:26:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:26:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:26:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-20 17:26:42,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057649667405765 [2024-06-20 17:26:42,393 INFO L175 Difference]: Start difference. First operand has 438 places, 578 transitions, 9545 flow. Second operand 11 states and 183 transitions. [2024-06-20 17:26:42,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 598 transitions, 10791 flow [2024-06-20 17:26:46,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 598 transitions, 10344 flow, removed 68 selfloop flow, removed 9 redundant places. [2024-06-20 17:26:46,680 INFO L231 Difference]: Finished difference. Result has 440 places, 581 transitions, 9242 flow [2024-06-20 17:26:46,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9098, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9242, PETRI_PLACES=440, PETRI_TRANSITIONS=581} [2024-06-20 17:26:46,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-20 17:26:46,680 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 581 transitions, 9242 flow [2024-06-20 17:26:46,681 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) [2024-06-20 17:26:46,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:46,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:46,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:26:46,681 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:46,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:46,681 INFO L85 PathProgramCache]: Analyzing trace with hash 955984227, now seen corresponding path program 15 times [2024-06-20 17:26:46,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:46,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776825418] [2024-06-20 17:26:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:46,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:47,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:47,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776825418] [2024-06-20 17:26:47,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776825418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:47,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:47,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:47,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102308765] [2024-06-20 17:26:47,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:47,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:47,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:47,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:47,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:47,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:26:47,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 581 transitions, 9242 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) [2024-06-20 17:26:47,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:47,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:26:47,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:49,540 INFO L124 PetriNetUnfolderBase]: 4181/6683 cut-off events. [2024-06-20 17:26:49,541 INFO L125 PetriNetUnfolderBase]: For 934319/934319 co-relation queries the response was YES. [2024-06-20 17:26:49,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64149 conditions, 6683 events. 4181/6683 cut-off events. For 934319/934319 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 42943 event pairs, 720 based on Foata normal form. 4/6678 useless extension candidates. Maximal degree in co-relation 63952. Up to 5825 conditions per place. [2024-06-20 17:26:49,642 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 465 selfloop transitions, 149 changer transitions 0/619 dead transitions. [2024-06-20 17:26:49,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 619 transitions, 11130 flow [2024-06-20 17:26:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:26:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:26:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 220 transitions. [2024-06-20 17:26:49,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 17:26:49,644 INFO L175 Difference]: Start difference. First operand has 440 places, 581 transitions, 9242 flow. Second operand 12 states and 220 transitions. [2024-06-20 17:26:49,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 619 transitions, 11130 flow [2024-06-20 17:26:53,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 619 transitions, 11014 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:26:53,860 INFO L231 Difference]: Finished difference. Result has 446 places, 584 transitions, 9508 flow [2024-06-20 17:26:53,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9126, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9508, PETRI_PLACES=446, PETRI_TRANSITIONS=584} [2024-06-20 17:26:53,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-20 17:26:53,861 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 584 transitions, 9508 flow [2024-06-20 17:26:53,861 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) [2024-06-20 17:26:53,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:53,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:53,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:26:53,861 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:53,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:53,861 INFO L85 PathProgramCache]: Analyzing trace with hash -928128755, now seen corresponding path program 16 times [2024-06-20 17:26:53,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:53,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319680512] [2024-06-20 17:26:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:53,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:54,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:54,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319680512] [2024-06-20 17:26:54,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319680512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:54,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:54,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:54,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538780541] [2024-06-20 17:26:54,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:54,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:54,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:54,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:54,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:54,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:26:54,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 584 transitions, 9508 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) [2024-06-20 17:26:54,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:54,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:26:54,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:56,727 INFO L124 PetriNetUnfolderBase]: 4211/6731 cut-off events. [2024-06-20 17:26:56,728 INFO L125 PetriNetUnfolderBase]: For 953729/953729 co-relation queries the response was YES. [2024-06-20 17:26:56,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65181 conditions, 6731 events. 4211/6731 cut-off events. For 953729/953729 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 43364 event pairs, 778 based on Foata normal form. 4/6732 useless extension candidates. Maximal degree in co-relation 64983. Up to 6357 conditions per place. [2024-06-20 17:26:56,828 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 569 selfloop transitions, 37 changer transitions 0/611 dead transitions. [2024-06-20 17:26:56,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 611 transitions, 10954 flow [2024-06-20 17:26:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:26:56,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 17:26:56,830 INFO L175 Difference]: Start difference. First operand has 446 places, 584 transitions, 9508 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:26:56,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 611 transitions, 10954 flow [2024-06-20 17:27:00,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 611 transitions, 10625 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-20 17:27:00,571 INFO L231 Difference]: Finished difference. Result has 446 places, 590 transitions, 9393 flow [2024-06-20 17:27:00,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9187, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9393, PETRI_PLACES=446, PETRI_TRANSITIONS=590} [2024-06-20 17:27:00,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-20 17:27:00,572 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 590 transitions, 9393 flow [2024-06-20 17:27:00,572 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) [2024-06-20 17:27:00,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:00,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:00,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:27:00,573 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:00,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash -922766375, now seen corresponding path program 17 times [2024-06-20 17:27:00,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:00,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171816466] [2024-06-20 17:27:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:00,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:01,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:01,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171816466] [2024-06-20 17:27:01,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171816466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:01,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:01,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:01,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922624252] [2024-06-20 17:27:01,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:01,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:01,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:01,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:01,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:01,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:27:01,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 590 transitions, 9393 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) [2024-06-20 17:27:01,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:01,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:27:01,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:03,525 INFO L124 PetriNetUnfolderBase]: 4199/6710 cut-off events. [2024-06-20 17:27:03,525 INFO L125 PetriNetUnfolderBase]: For 943587/943587 co-relation queries the response was YES. [2024-06-20 17:27:03,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64182 conditions, 6710 events. 4199/6710 cut-off events. For 943587/943587 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 43194 event pairs, 758 based on Foata normal form. 4/6711 useless extension candidates. Maximal degree in co-relation 63983. Up to 6281 conditions per place. [2024-06-20 17:27:03,627 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 568 selfloop transitions, 47 changer transitions 0/620 dead transitions. [2024-06-20 17:27:03,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 620 transitions, 11035 flow [2024-06-20 17:27:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:27:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:27:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 221 transitions. [2024-06-20 17:27:03,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:27:03,628 INFO L175 Difference]: Start difference. First operand has 446 places, 590 transitions, 9393 flow. Second operand 13 states and 221 transitions. [2024-06-20 17:27:03,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 620 transitions, 11035 flow [2024-06-20 17:27:07,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 620 transitions, 10887 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 17:27:07,911 INFO L231 Difference]: Finished difference. Result has 454 places, 590 transitions, 9345 flow [2024-06-20 17:27:07,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9245, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9345, PETRI_PLACES=454, PETRI_TRANSITIONS=590} [2024-06-20 17:27:07,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-20 17:27:07,911 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 590 transitions, 9345 flow [2024-06-20 17:27:07,911 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) [2024-06-20 17:27:07,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:07,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:07,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:27:07,912 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:07,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash 969793797, now seen corresponding path program 18 times [2024-06-20 17:27:07,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:07,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818987621] [2024-06-20 17:27:07,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:07,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:08,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:08,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818987621] [2024-06-20 17:27:08,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818987621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:08,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:08,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:08,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185071559] [2024-06-20 17:27:08,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:08,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:08,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:08,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:08,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:08,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:27:08,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 590 transitions, 9345 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) [2024-06-20 17:27:08,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:08,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:27:08,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:10,898 INFO L124 PetriNetUnfolderBase]: 4187/6694 cut-off events. [2024-06-20 17:27:10,898 INFO L125 PetriNetUnfolderBase]: For 932993/932993 co-relation queries the response was YES. [2024-06-20 17:27:10,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63560 conditions, 6694 events. 4187/6694 cut-off events. For 932993/932993 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 43113 event pairs, 754 based on Foata normal form. 4/6695 useless extension candidates. Maximal degree in co-relation 63360. Up to 6273 conditions per place. [2024-06-20 17:27:11,011 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 562 selfloop transitions, 47 changer transitions 0/614 dead transitions. [2024-06-20 17:27:11,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 614 transitions, 10707 flow [2024-06-20 17:27:11,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:27:11,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:27:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-20 17:27:11,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190687361419069 [2024-06-20 17:27:11,012 INFO L175 Difference]: Start difference. First operand has 454 places, 590 transitions, 9345 flow. Second operand 11 states and 189 transitions. [2024-06-20 17:27:11,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 614 transitions, 10707 flow [2024-06-20 17:27:14,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 614 transitions, 10452 flow, removed 33 selfloop flow, removed 13 redundant places. [2024-06-20 17:27:14,518 INFO L231 Difference]: Finished difference. Result has 452 places, 590 transitions, 9190 flow [2024-06-20 17:27:14,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9090, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9190, PETRI_PLACES=452, PETRI_TRANSITIONS=590} [2024-06-20 17:27:14,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-20 17:27:14,519 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 590 transitions, 9190 flow [2024-06-20 17:27:14,519 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) [2024-06-20 17:27:14,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:14,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:14,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:27:14,519 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:14,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:14,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1208647245, now seen corresponding path program 19 times [2024-06-20 17:27:14,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:14,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198429860] [2024-06-20 17:27:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:14,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:15,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:15,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198429860] [2024-06-20 17:27:15,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198429860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:15,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:15,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:15,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267579613] [2024-06-20 17:27:15,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:15,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:15,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:15,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:15,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:15,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:27:15,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 590 transitions, 9190 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) [2024-06-20 17:27:15,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:15,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:27:15,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:17,333 INFO L124 PetriNetUnfolderBase]: 4281/6842 cut-off events. [2024-06-20 17:27:17,333 INFO L125 PetriNetUnfolderBase]: For 998156/998156 co-relation queries the response was YES. [2024-06-20 17:27:17,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65846 conditions, 6842 events. 4281/6842 cut-off events. For 998156/998156 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 44156 event pairs, 800 based on Foata normal form. 4/6843 useless extension candidates. Maximal degree in co-relation 65645. Up to 6216 conditions per place. [2024-06-20 17:27:17,440 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 535 selfloop transitions, 95 changer transitions 0/635 dead transitions. [2024-06-20 17:27:17,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 635 transitions, 11179 flow [2024-06-20 17:27:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:27:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:27:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-20 17:27:17,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-20 17:27:17,441 INFO L175 Difference]: Start difference. First operand has 452 places, 590 transitions, 9190 flow. Second operand 8 states and 166 transitions. [2024-06-20 17:27:17,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 635 transitions, 11179 flow [2024-06-20 17:27:21,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 635 transitions, 11085 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-20 17:27:21,438 INFO L231 Difference]: Finished difference. Result has 451 places, 602 transitions, 9672 flow [2024-06-20 17:27:21,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9096, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9672, PETRI_PLACES=451, PETRI_TRANSITIONS=602} [2024-06-20 17:27:21,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-20 17:27:21,439 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 602 transitions, 9672 flow [2024-06-20 17:27:21,439 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) [2024-06-20 17:27:21,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:21,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:21,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:27:21,439 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:21,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:21,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1230682629, now seen corresponding path program 20 times [2024-06-20 17:27:21,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:21,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511193855] [2024-06-20 17:27:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:21,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:22,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:22,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511193855] [2024-06-20 17:27:22,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511193855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:22,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:22,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:22,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526560362] [2024-06-20 17:27:22,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:22,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:22,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:22,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:22,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:22,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:27:22,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 602 transitions, 9672 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) [2024-06-20 17:27:22,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:22,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:27:22,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:24,411 INFO L124 PetriNetUnfolderBase]: 4333/6892 cut-off events. [2024-06-20 17:27:24,411 INFO L125 PetriNetUnfolderBase]: For 1046681/1046681 co-relation queries the response was YES. [2024-06-20 17:27:24,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67715 conditions, 6892 events. 4333/6892 cut-off events. For 1046681/1046681 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 44355 event pairs, 828 based on Foata normal form. 4/6893 useless extension candidates. Maximal degree in co-relation 67512. Up to 6479 conditions per place. [2024-06-20 17:27:24,526 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 586 selfloop transitions, 38 changer transitions 0/629 dead transitions. [2024-06-20 17:27:24,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 629 transitions, 11456 flow [2024-06-20 17:27:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:27:24,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:27:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:27:24,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 17:27:24,527 INFO L175 Difference]: Start difference. First operand has 451 places, 602 transitions, 9672 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:27:24,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 629 transitions, 11456 flow [2024-06-20 17:27:29,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 629 transitions, 11241 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-20 17:27:29,130 INFO L231 Difference]: Finished difference. Result has 453 places, 608 transitions, 9741 flow [2024-06-20 17:27:29,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9459, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9741, PETRI_PLACES=453, PETRI_TRANSITIONS=608} [2024-06-20 17:27:29,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-20 17:27:29,130 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 608 transitions, 9741 flow [2024-06-20 17:27:29,130 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) [2024-06-20 17:27:29,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:29,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:29,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:27:29,131 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:29,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:29,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1014707835, now seen corresponding path program 21 times [2024-06-20 17:27:29,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:29,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15137912] [2024-06-20 17:27:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:29,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:29,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:29,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15137912] [2024-06-20 17:27:29,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15137912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:29,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:29,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:29,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55172932] [2024-06-20 17:27:29,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:29,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:29,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:29,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:29,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:29,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:27:29,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 608 transitions, 9741 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) [2024-06-20 17:27:29,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:29,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:27:29,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:32,146 INFO L124 PetriNetUnfolderBase]: 4363/6944 cut-off events. [2024-06-20 17:27:32,146 INFO L125 PetriNetUnfolderBase]: For 1047624/1047624 co-relation queries the response was YES. [2024-06-20 17:27:32,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67889 conditions, 6944 events. 4363/6944 cut-off events. For 1047624/1047624 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 44774 event pairs, 816 based on Foata normal form. 4/6945 useless extension candidates. Maximal degree in co-relation 67687. Up to 6501 conditions per place. [2024-06-20 17:27:32,262 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 590 selfloop transitions, 45 changer transitions 0/640 dead transitions. [2024-06-20 17:27:32,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 640 transitions, 11570 flow [2024-06-20 17:27:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:27:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:27:32,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-20 17:27:32,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:27:32,263 INFO L175 Difference]: Start difference. First operand has 453 places, 608 transitions, 9741 flow. Second operand 10 states and 180 transitions. [2024-06-20 17:27:32,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 640 transitions, 11570 flow [2024-06-20 17:27:37,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 640 transitions, 11392 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-20 17:27:37,181 INFO L231 Difference]: Finished difference. Result has 460 places, 614 transitions, 9812 flow [2024-06-20 17:27:37,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9598, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9812, PETRI_PLACES=460, PETRI_TRANSITIONS=614} [2024-06-20 17:27:37,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-20 17:27:37,182 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 614 transitions, 9812 flow [2024-06-20 17:27:37,182 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) [2024-06-20 17:27:37,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:37,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:37,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:27:37,183 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:37,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:37,183 INFO L85 PathProgramCache]: Analyzing trace with hash -260068810, now seen corresponding path program 2 times [2024-06-20 17:27:37,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:37,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903236520] [2024-06-20 17:27:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:37,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:37,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:37,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903236520] [2024-06-20 17:27:37,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903236520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:37,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:37,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:37,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164699858] [2024-06-20 17:27:37,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:37,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:38,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:38,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:38,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:38,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:27:38,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 614 transitions, 9812 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) [2024-06-20 17:27:38,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:38,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:27:38,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:40,192 INFO L124 PetriNetUnfolderBase]: 4389/7000 cut-off events. [2024-06-20 17:27:40,192 INFO L125 PetriNetUnfolderBase]: For 1064566/1064566 co-relation queries the response was YES. [2024-06-20 17:27:40,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68450 conditions, 7000 events. 4389/7000 cut-off events. For 1064566/1064566 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 45254 event pairs, 820 based on Foata normal form. 2/6999 useless extension candidates. Maximal degree in co-relation 68247. Up to 6482 conditions per place. [2024-06-20 17:27:40,322 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 554 selfloop transitions, 88 changer transitions 0/647 dead transitions. [2024-06-20 17:27:40,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 647 transitions, 11666 flow [2024-06-20 17:27:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-20 17:27:40,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087108013937283 [2024-06-20 17:27:40,323 INFO L175 Difference]: Start difference. First operand has 460 places, 614 transitions, 9812 flow. Second operand 7 states and 146 transitions. [2024-06-20 17:27:40,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 647 transitions, 11666 flow [2024-06-20 17:27:45,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 647 transitions, 11542 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 17:27:45,438 INFO L231 Difference]: Finished difference. Result has 462 places, 621 transitions, 10122 flow [2024-06-20 17:27:45,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9688, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10122, PETRI_PLACES=462, PETRI_TRANSITIONS=621} [2024-06-20 17:27:45,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-20 17:27:45,439 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 621 transitions, 10122 flow [2024-06-20 17:27:45,439 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) [2024-06-20 17:27:45,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:45,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:45,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:27:45,439 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:45,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:45,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1947662386, now seen corresponding path program 11 times [2024-06-20 17:27:45,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:45,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121776759] [2024-06-20 17:27:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:45,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:46,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:46,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121776759] [2024-06-20 17:27:46,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121776759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:46,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:46,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:46,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777193419] [2024-06-20 17:27:46,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:46,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:46,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:46,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:46,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:46,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:27:46,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 621 transitions, 10122 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) [2024-06-20 17:27:46,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:46,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:27:46,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:48,683 INFO L124 PetriNetUnfolderBase]: 4383/6992 cut-off events. [2024-06-20 17:27:48,683 INFO L125 PetriNetUnfolderBase]: For 1073574/1073574 co-relation queries the response was YES. [2024-06-20 17:27:48,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68720 conditions, 6992 events. 4383/6992 cut-off events. For 1073574/1073574 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 45236 event pairs, 844 based on Foata normal form. 2/6991 useless extension candidates. Maximal degree in co-relation 68515. Up to 6534 conditions per place. [2024-06-20 17:27:48,810 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 585 selfloop transitions, 57 changer transitions 0/647 dead transitions. [2024-06-20 17:27:48,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 647 transitions, 11516 flow [2024-06-20 17:27:48,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:27:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:27:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 17:27:48,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-20 17:27:48,811 INFO L175 Difference]: Start difference. First operand has 462 places, 621 transitions, 10122 flow. Second operand 8 states and 155 transitions. [2024-06-20 17:27:48,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 647 transitions, 11516 flow [2024-06-20 17:27:54,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 647 transitions, 11353 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-20 17:27:54,457 INFO L231 Difference]: Finished difference. Result has 467 places, 621 transitions, 10093 flow [2024-06-20 17:27:54,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9959, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10093, PETRI_PLACES=467, PETRI_TRANSITIONS=621} [2024-06-20 17:27:54,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-20 17:27:54,457 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 621 transitions, 10093 flow [2024-06-20 17:27:54,457 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) [2024-06-20 17:27:54,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:54,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:54,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:27:54,457 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:54,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:54,458 INFO L85 PathProgramCache]: Analyzing trace with hash 988971909, now seen corresponding path program 22 times [2024-06-20 17:27:54,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:54,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133564038] [2024-06-20 17:27:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:54,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:55,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:55,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133564038] [2024-06-20 17:27:55,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133564038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:55,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:55,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:55,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283240477] [2024-06-20 17:27:55,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:55,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:55,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:55,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:55,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:55,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:27:55,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 621 transitions, 10093 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) [2024-06-20 17:27:55,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:55,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:27:55,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:57,396 INFO L124 PetriNetUnfolderBase]: 4435/7048 cut-off events. [2024-06-20 17:27:57,396 INFO L125 PetriNetUnfolderBase]: For 1116114/1116114 co-relation queries the response was YES. [2024-06-20 17:27:57,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70064 conditions, 7048 events. 4435/7048 cut-off events. For 1116114/1116114 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 45461 event pairs, 841 based on Foata normal form. 4/7049 useless extension candidates. Maximal degree in co-relation 69858. Up to 6394 conditions per place. [2024-06-20 17:27:57,524 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 570 selfloop transitions, 79 changer transitions 0/654 dead transitions. [2024-06-20 17:27:57,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 654 transitions, 12215 flow [2024-06-20 17:27:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:27:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:27:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 17:27:57,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47865853658536583 [2024-06-20 17:27:57,525 INFO L175 Difference]: Start difference. First operand has 467 places, 621 transitions, 10093 flow. Second operand 8 states and 157 transitions. [2024-06-20 17:27:57,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 654 transitions, 12215 flow [2024-06-20 17:28:02,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 654 transitions, 12098 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:02,438 INFO L231 Difference]: Finished difference. Result has 469 places, 627 transitions, 10340 flow [2024-06-20 17:28:02,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9980, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10340, PETRI_PLACES=469, PETRI_TRANSITIONS=627} [2024-06-20 17:28:02,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-20 17:28:02,439 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 627 transitions, 10340 flow [2024-06-20 17:28:02,439 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) [2024-06-20 17:28:02,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:02,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:02,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:28:02,439 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:02,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:02,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1000631355, now seen corresponding path program 23 times [2024-06-20 17:28:02,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:02,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932634215] [2024-06-20 17:28:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:02,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:03,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:03,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932634215] [2024-06-20 17:28:03,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932634215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:03,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:03,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:03,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247382913] [2024-06-20 17:28:03,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:03,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:03,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:03,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:03,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:03,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:28:03,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 627 transitions, 10340 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) [2024-06-20 17:28:03,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:03,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:28:03,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:05,260 INFO L124 PetriNetUnfolderBase]: 4455/7093 cut-off events. [2024-06-20 17:28:05,260 INFO L125 PetriNetUnfolderBase]: For 1119209/1119209 co-relation queries the response was YES. [2024-06-20 17:28:05,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70624 conditions, 7093 events. 4455/7093 cut-off events. For 1119209/1119209 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 45949 event pairs, 827 based on Foata normal form. 4/7088 useless extension candidates. Maximal degree in co-relation 70417. Up to 6065 conditions per place. [2024-06-20 17:28:05,390 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 511 selfloop transitions, 142 changer transitions 0/658 dead transitions. [2024-06-20 17:28:05,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 658 transitions, 12639 flow [2024-06-20 17:28:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-20 17:28:05,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 17:28:05,391 INFO L175 Difference]: Start difference. First operand has 469 places, 627 transitions, 10340 flow. Second operand 8 states and 160 transitions. [2024-06-20 17:28:05,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 658 transitions, 12639 flow [2024-06-20 17:28:09,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 658 transitions, 12441 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:09,947 INFO L231 Difference]: Finished difference. Result has 471 places, 630 transitions, 10537 flow [2024-06-20 17:28:09,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10148, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10537, PETRI_PLACES=471, PETRI_TRANSITIONS=630} [2024-06-20 17:28:09,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-20 17:28:09,948 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 630 transitions, 10537 flow [2024-06-20 17:28:09,948 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) [2024-06-20 17:28:09,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:09,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:09,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:28:09,949 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:09,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:09,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1000625620, now seen corresponding path program 12 times [2024-06-20 17:28:09,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:09,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322248472] [2024-06-20 17:28:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:09,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:10,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:10,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322248472] [2024-06-20 17:28:10,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322248472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:10,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:10,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:10,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28308158] [2024-06-20 17:28:10,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:10,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:10,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:10,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:10,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:28:10,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 630 transitions, 10537 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) [2024-06-20 17:28:10,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:10,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:28:10,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:13,026 INFO L124 PetriNetUnfolderBase]: 4452/7093 cut-off events. [2024-06-20 17:28:13,026 INFO L125 PetriNetUnfolderBase]: For 1095126/1095126 co-relation queries the response was YES. [2024-06-20 17:28:13,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70513 conditions, 7093 events. 4452/7093 cut-off events. For 1095126/1095126 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 45951 event pairs, 863 based on Foata normal form. 1/7085 useless extension candidates. Maximal degree in co-relation 70306. Up to 6627 conditions per place. [2024-06-20 17:28:13,155 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 599 selfloop transitions, 62 changer transitions 0/666 dead transitions. [2024-06-20 17:28:13,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 666 transitions, 12252 flow [2024-06-20 17:28:13,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 17:28:13,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-20 17:28:13,156 INFO L175 Difference]: Start difference. First operand has 471 places, 630 transitions, 10537 flow. Second operand 8 states and 153 transitions. [2024-06-20 17:28:13,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 666 transitions, 12252 flow [2024-06-20 17:28:17,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 666 transitions, 11824 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:17,936 INFO L231 Difference]: Finished difference. Result has 475 places, 643 transitions, 10641 flow [2024-06-20 17:28:17,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10115, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10641, PETRI_PLACES=475, PETRI_TRANSITIONS=643} [2024-06-20 17:28:17,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-20 17:28:17,937 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 643 transitions, 10641 flow [2024-06-20 17:28:17,937 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) [2024-06-20 17:28:17,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:17,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:17,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 17:28:17,938 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:17,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:17,938 INFO L85 PathProgramCache]: Analyzing trace with hash -820591689, now seen corresponding path program 24 times [2024-06-20 17:28:17,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:17,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068550534] [2024-06-20 17:28:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:17,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:18,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:18,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068550534] [2024-06-20 17:28:18,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068550534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:18,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:18,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:18,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207660247] [2024-06-20 17:28:18,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:18,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:18,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:18,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:18,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:18,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:28:18,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 643 transitions, 10641 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) [2024-06-20 17:28:18,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:18,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:28:18,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:20,851 INFO L124 PetriNetUnfolderBase]: 4440/7067 cut-off events. [2024-06-20 17:28:20,852 INFO L125 PetriNetUnfolderBase]: For 1104120/1104120 co-relation queries the response was YES. [2024-06-20 17:28:20,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69465 conditions, 7067 events. 4440/7067 cut-off events. For 1104120/1104120 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 45716 event pairs, 801 based on Foata normal form. 4/7062 useless extension candidates. Maximal degree in co-relation 69256. Up to 6053 conditions per place. [2024-06-20 17:28:20,992 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 519 selfloop transitions, 150 changer transitions 0/674 dead transitions. [2024-06-20 17:28:20,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 674 transitions, 12897 flow [2024-06-20 17:28:20,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-20 17:28:20,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 17:28:20,993 INFO L175 Difference]: Start difference. First operand has 475 places, 643 transitions, 10641 flow. Second operand 8 states and 164 transitions. [2024-06-20 17:28:20,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 674 transitions, 12897 flow [2024-06-20 17:28:25,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 674 transitions, 12699 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-20 17:28:25,802 INFO L231 Difference]: Finished difference. Result has 479 places, 643 transitions, 10750 flow [2024-06-20 17:28:25,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10443, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10750, PETRI_PLACES=479, PETRI_TRANSITIONS=643} [2024-06-20 17:28:25,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-20 17:28:25,803 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 643 transitions, 10750 flow [2024-06-20 17:28:25,803 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) [2024-06-20 17:28:25,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:25,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:25,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 17:28:25,803 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:25,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:25,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1009345455, now seen corresponding path program 25 times [2024-06-20 17:28:25,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:25,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720059685] [2024-06-20 17:28:25,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:25,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:26,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:26,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720059685] [2024-06-20 17:28:26,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720059685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:26,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:26,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:26,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333472048] [2024-06-20 17:28:26,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:26,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:26,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:26,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:26,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:26,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:28:26,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 643 transitions, 10750 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) [2024-06-20 17:28:26,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:26,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:28:26,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:28,776 INFO L124 PetriNetUnfolderBase]: 4428/7040 cut-off events. [2024-06-20 17:28:28,777 INFO L125 PetriNetUnfolderBase]: For 1095428/1095428 co-relation queries the response was YES. [2024-06-20 17:28:28,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69419 conditions, 7040 events. 4428/7040 cut-off events. For 1095428/1095428 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 45426 event pairs, 839 based on Foata normal form. 4/7041 useless extension candidates. Maximal degree in co-relation 69209. Up to 6653 conditions per place. [2024-06-20 17:28:28,908 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 622 selfloop transitions, 38 changer transitions 0/665 dead transitions. [2024-06-20 17:28:28,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 665 transitions, 12180 flow [2024-06-20 17:28:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:28:28,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 17:28:28,909 INFO L175 Difference]: Start difference. First operand has 479 places, 643 transitions, 10750 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:28:28,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 665 transitions, 12180 flow [2024-06-20 17:28:33,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 665 transitions, 11691 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:33,386 INFO L231 Difference]: Finished difference. Result has 481 places, 643 transitions, 10343 flow [2024-06-20 17:28:33,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10261, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10343, PETRI_PLACES=481, PETRI_TRANSITIONS=643} [2024-06-20 17:28:33,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-20 17:28:33,387 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 643 transitions, 10343 flow [2024-06-20 17:28:33,387 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) [2024-06-20 17:28:33,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:33,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:33,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 17:28:33,387 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)] === [2024-06-20 17:28:33,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:33,387 INFO L85 PathProgramCache]: Analyzing trace with hash -716944330, now seen corresponding path program 3 times [2024-06-20 17:28:33,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:33,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250924684] [2024-06-20 17:28:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:33,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:34,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:34,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250924684] [2024-06-20 17:28:34,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250924684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:34,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:34,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:34,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233231644] [2024-06-20 17:28:34,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:34,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:34,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:34,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:34,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:34,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:28:34,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 643 transitions, 10343 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) [2024-06-20 17:28:34,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:34,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:28:34,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:36,334 INFO L124 PetriNetUnfolderBase]: 4422/7054 cut-off events. [2024-06-20 17:28:36,334 INFO L125 PetriNetUnfolderBase]: For 1080479/1080479 co-relation queries the response was YES. [2024-06-20 17:28:36,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68148 conditions, 7054 events. 4422/7054 cut-off events. For 1080479/1080479 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 45741 event pairs, 841 based on Foata normal form. 2/7053 useless extension candidates. Maximal degree in co-relation 67938. Up to 6617 conditions per place. [2024-06-20 17:28:36,490 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 607 selfloop transitions, 50 changer transitions 0/662 dead transitions. [2024-06-20 17:28:36,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 662 transitions, 11751 flow [2024-06-20 17:28:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-20 17:28:36,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 17:28:36,491 INFO L175 Difference]: Start difference. First operand has 481 places, 643 transitions, 10343 flow. Second operand 6 states and 123 transitions. [2024-06-20 17:28:36,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 662 transitions, 11751 flow [2024-06-20 17:28:42,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 662 transitions, 11633 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:42,323 INFO L231 Difference]: Finished difference. Result has 482 places, 643 transitions, 10357 flow [2024-06-20 17:28:42,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10225, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10357, PETRI_PLACES=482, PETRI_TRANSITIONS=643} [2024-06-20 17:28:42,324 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-20 17:28:42,324 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 643 transitions, 10357 flow [2024-06-20 17:28:42,324 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) [2024-06-20 17:28:42,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:42,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:42,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 17:28:42,324 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)] === [2024-06-20 17:28:42,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:42,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1009196500, now seen corresponding path program 13 times [2024-06-20 17:28:42,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:42,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529395103] [2024-06-20 17:28:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:42,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:43,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:43,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529395103] [2024-06-20 17:28:43,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529395103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:43,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:43,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:43,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406376322] [2024-06-20 17:28:43,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:43,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:43,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:43,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:43,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:28:43,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 643 transitions, 10357 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) [2024-06-20 17:28:43,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:43,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:28:43,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:45,464 INFO L124 PetriNetUnfolderBase]: 4424/7046 cut-off events. [2024-06-20 17:28:45,464 INFO L125 PetriNetUnfolderBase]: For 1090979/1090979 co-relation queries the response was YES. [2024-06-20 17:28:45,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68248 conditions, 7046 events. 4424/7046 cut-off events. For 1090979/1090979 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 45539 event pairs, 846 based on Foata normal form. 2/7039 useless extension candidates. Maximal degree in co-relation 68037. Up to 6418 conditions per place. [2024-06-20 17:28:45,608 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 539 selfloop transitions, 130 changer transitions 0/674 dead transitions. [2024-06-20 17:28:45,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 674 transitions, 12112 flow [2024-06-20 17:28:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 17:28:45,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-20 17:28:45,609 INFO L175 Difference]: Start difference. First operand has 482 places, 643 transitions, 10357 flow. Second operand 9 states and 177 transitions. [2024-06-20 17:28:45,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 674 transitions, 12112 flow [2024-06-20 17:28:51,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 674 transitions, 11948 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:51,375 INFO L231 Difference]: Finished difference. Result has 487 places, 646 transitions, 10625 flow [2024-06-20 17:28:51,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10195, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10625, PETRI_PLACES=487, PETRI_TRANSITIONS=646} [2024-06-20 17:28:51,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-20 17:28:51,376 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 646 transitions, 10625 flow [2024-06-20 17:28:51,376 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) [2024-06-20 17:28:51,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:51,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:51,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 17:28:51,376 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)] === [2024-06-20 17:28:51,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:51,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1424622039, now seen corresponding path program 26 times [2024-06-20 17:28:51,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:51,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596440460] [2024-06-20 17:28:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:51,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:52,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:52,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596440460] [2024-06-20 17:28:52,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596440460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:52,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:52,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:52,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666060492] [2024-06-20 17:28:52,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:52,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:52,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:52,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:52,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:52,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:28:52,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 646 transitions, 10625 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) [2024-06-20 17:28:52,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:52,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:28:52,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:54,275 INFO L124 PetriNetUnfolderBase]: 4412/7027 cut-off events. [2024-06-20 17:28:54,275 INFO L125 PetriNetUnfolderBase]: For 1077725/1077725 co-relation queries the response was YES. [2024-06-20 17:28:54,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67881 conditions, 7027 events. 4412/7027 cut-off events. For 1077725/1077725 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 45365 event pairs, 816 based on Foata normal form. 4/7028 useless extension candidates. Maximal degree in co-relation 67669. Up to 6409 conditions per place. [2024-06-20 17:28:54,403 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 579 selfloop transitions, 96 changer transitions 0/680 dead transitions. [2024-06-20 17:28:54,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 680 transitions, 12434 flow [2024-06-20 17:28:54,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-20 17:28:54,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-20 17:28:54,404 INFO L175 Difference]: Start difference. First operand has 487 places, 646 transitions, 10625 flow. Second operand 8 states and 167 transitions. [2024-06-20 17:28:54,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 680 transitions, 12434 flow [2024-06-20 17:28:59,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 680 transitions, 12151 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:59,475 INFO L231 Difference]: Finished difference. Result has 489 places, 646 transitions, 10554 flow [2024-06-20 17:28:59,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10342, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10554, PETRI_PLACES=489, PETRI_TRANSITIONS=646} [2024-06-20 17:28:59,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-20 17:28:59,476 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 646 transitions, 10554 flow [2024-06-20 17:28:59,476 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) [2024-06-20 17:28:59,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:59,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:59,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 17:28:59,477 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)] === [2024-06-20 17:28:59,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:59,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1952068705, now seen corresponding path program 27 times [2024-06-20 17:28:59,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:59,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049658108] [2024-06-20 17:28:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:59,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:00,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:00,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049658108] [2024-06-20 17:29:00,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049658108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:00,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:00,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:00,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825669875] [2024-06-20 17:29:00,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:00,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:00,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:00,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:00,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:00,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:29:00,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 646 transitions, 10554 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) [2024-06-20 17:29:00,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:00,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:29:00,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:02,372 INFO L124 PetriNetUnfolderBase]: 4400/7017 cut-off events. [2024-06-20 17:29:02,372 INFO L125 PetriNetUnfolderBase]: For 1065760/1065760 co-relation queries the response was YES. [2024-06-20 17:29:02,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67234 conditions, 7017 events. 4400/7017 cut-off events. For 1065760/1065760 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 45458 event pairs, 824 based on Foata normal form. 4/7018 useless extension candidates. Maximal degree in co-relation 67021. Up to 6570 conditions per place. [2024-06-20 17:29:02,700 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 621 selfloop transitions, 47 changer transitions 0/673 dead transitions. [2024-06-20 17:29:02,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 673 transitions, 12059 flow [2024-06-20 17:29:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:02,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-20 17:29:02,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-20 17:29:02,701 INFO L175 Difference]: Start difference. First operand has 489 places, 646 transitions, 10554 flow. Second operand 7 states and 142 transitions. [2024-06-20 17:29:02,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 673 transitions, 12059 flow [2024-06-20 17:29:08,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 673 transitions, 11834 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:08,550 INFO L231 Difference]: Finished difference. Result has 489 places, 646 transitions, 10443 flow [2024-06-20 17:29:08,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10329, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10443, PETRI_PLACES=489, PETRI_TRANSITIONS=646} [2024-06-20 17:29:08,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-20 17:29:08,551 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 646 transitions, 10443 flow [2024-06-20 17:29:08,551 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) [2024-06-20 17:29:08,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:08,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:08,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 17:29:08,552 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)] === [2024-06-20 17:29:08,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:08,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1225141689, now seen corresponding path program 28 times [2024-06-20 17:29:08,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:08,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410241119] [2024-06-20 17:29:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:08,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:09,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:09,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410241119] [2024-06-20 17:29:09,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410241119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:09,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:09,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:09,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660670185] [2024-06-20 17:29:09,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:09,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:09,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:09,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:09,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:09,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:29:09,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 646 transitions, 10443 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) [2024-06-20 17:29:09,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:09,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:29:09,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:11,461 INFO L124 PetriNetUnfolderBase]: 4388/6998 cut-off events. [2024-06-20 17:29:11,461 INFO L125 PetriNetUnfolderBase]: For 1037204/1037204 co-relation queries the response was YES. [2024-06-20 17:29:11,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66384 conditions, 6998 events. 4388/6998 cut-off events. For 1037204/1037204 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 45283 event pairs, 760 based on Foata normal form. 4/6993 useless extension candidates. Maximal degree in co-relation 66171. Up to 6016 conditions per place. [2024-06-20 17:29:11,581 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 509 selfloop transitions, 161 changer transitions 0/675 dead transitions. [2024-06-20 17:29:11,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 675 transitions, 12249 flow [2024-06-20 17:29:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-20 17:29:11,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-20 17:29:11,583 INFO L175 Difference]: Start difference. First operand has 489 places, 646 transitions, 10443 flow. Second operand 8 states and 161 transitions. [2024-06-20 17:29:11,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 675 transitions, 12249 flow [2024-06-20 17:29:16,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 675 transitions, 12073 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:16,733 INFO L231 Difference]: Finished difference. Result has 491 places, 646 transitions, 10596 flow [2024-06-20 17:29:16,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10267, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10596, PETRI_PLACES=491, PETRI_TRANSITIONS=646} [2024-06-20 17:29:16,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-20 17:29:16,733 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 646 transitions, 10596 flow [2024-06-20 17:29:16,733 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) [2024-06-20 17:29:16,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:16,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:16,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 17:29:16,734 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)] === [2024-06-20 17:29:16,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1110663569, now seen corresponding path program 29 times [2024-06-20 17:29:16,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:16,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508805520] [2024-06-20 17:29:16,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:16,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:17,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:17,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508805520] [2024-06-20 17:29:17,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508805520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:17,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:17,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:17,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811712999] [2024-06-20 17:29:17,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:17,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:17,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:17,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:17,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:17,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:29:17,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 646 transitions, 10596 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) [2024-06-20 17:29:17,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:17,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:29:17,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:19,581 INFO L124 PetriNetUnfolderBase]: 4376/6981 cut-off events. [2024-06-20 17:29:19,581 INFO L125 PetriNetUnfolderBase]: For 1024344/1024344 co-relation queries the response was YES. [2024-06-20 17:29:19,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66253 conditions, 6981 events. 4376/6981 cut-off events. For 1024344/1024344 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 45186 event pairs, 788 based on Foata normal form. 4/6982 useless extension candidates. Maximal degree in co-relation 66039. Up to 6333 conditions per place. [2024-06-20 17:29:19,705 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 582 selfloop transitions, 88 changer transitions 0/675 dead transitions. [2024-06-20 17:29:19,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 675 transitions, 12368 flow [2024-06-20 17:29:19,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 17:29:19,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-20 17:29:19,706 INFO L175 Difference]: Start difference. First operand has 491 places, 646 transitions, 10596 flow. Second operand 8 states and 159 transitions. [2024-06-20 17:29:19,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 675 transitions, 12368 flow [2024-06-20 17:29:24,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 675 transitions, 11706 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-20 17:29:24,652 INFO L231 Difference]: Finished difference. Result has 490 places, 646 transitions, 10122 flow [2024-06-20 17:29:24,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9934, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10122, PETRI_PLACES=490, PETRI_TRANSITIONS=646} [2024-06-20 17:29:24,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-20 17:29:24,653 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 646 transitions, 10122 flow [2024-06-20 17:29:24,653 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) [2024-06-20 17:29:24,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:24,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:24,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 17:29:24,653 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)] === [2024-06-20 17:29:24,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1103306339, now seen corresponding path program 30 times [2024-06-20 17:29:24,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:24,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217540370] [2024-06-20 17:29:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:24,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:25,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:25,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217540370] [2024-06-20 17:29:25,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217540370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:25,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:25,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:25,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405939625] [2024-06-20 17:29:25,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:25,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:25,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:25,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:25,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:25,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:29:25,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 646 transitions, 10122 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) [2024-06-20 17:29:25,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:25,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:29:25,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:27,593 INFO L124 PetriNetUnfolderBase]: 4364/6969 cut-off events. [2024-06-20 17:29:27,593 INFO L125 PetriNetUnfolderBase]: For 1005388/1005388 co-relation queries the response was YES. [2024-06-20 17:29:27,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64540 conditions, 6969 events. 4364/6969 cut-off events. For 1005388/1005388 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 45110 event pairs, 804 based on Foata normal form. 4/6970 useless extension candidates. Maximal degree in co-relation 64327. Up to 6537 conditions per place. [2024-06-20 17:29:27,723 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 621 selfloop transitions, 40 changer transitions 0/666 dead transitions. [2024-06-20 17:29:27,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 666 transitions, 11574 flow [2024-06-20 17:29:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:27,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:29:27,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 17:29:27,724 INFO L175 Difference]: Start difference. First operand has 490 places, 646 transitions, 10122 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:29:27,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 666 transitions, 11574 flow [2024-06-20 17:29:32,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 666 transitions, 11267 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-20 17:29:32,852 INFO L231 Difference]: Finished difference. Result has 490 places, 646 transitions, 9905 flow [2024-06-20 17:29:32,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9815, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9905, PETRI_PLACES=490, PETRI_TRANSITIONS=646} [2024-06-20 17:29:32,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-20 17:29:32,852 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 646 transitions, 9905 flow [2024-06-20 17:29:32,853 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) [2024-06-20 17:29:32,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:32,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:32,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 17:29:32,853 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)] === [2024-06-20 17:29:32,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:32,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1103298682, now seen corresponding path program 4 times [2024-06-20 17:29:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:32,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416462052] [2024-06-20 17:29:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:32,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:33,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:33,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416462052] [2024-06-20 17:29:33,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416462052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:33,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:33,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:33,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111467525] [2024-06-20 17:29:33,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:33,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:33,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:33,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:33,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:33,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:29:33,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 646 transitions, 9905 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) [2024-06-20 17:29:33,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:33,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:29:33,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:35,774 INFO L124 PetriNetUnfolderBase]: 4366/6987 cut-off events. [2024-06-20 17:29:35,774 INFO L125 PetriNetUnfolderBase]: For 983106/983106 co-relation queries the response was YES. [2024-06-20 17:29:35,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64119 conditions, 6987 events. 4366/6987 cut-off events. For 983106/983106 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 45381 event pairs, 809 based on Foata normal form. 2/6986 useless extension candidates. Maximal degree in co-relation 63906. Up to 6554 conditions per place. [2024-06-20 17:29:35,917 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 613 selfloop transitions, 48 changer transitions 0/666 dead transitions. [2024-06-20 17:29:35,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 666 transitions, 11415 flow [2024-06-20 17:29:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:35,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:35,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 17:29:35,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:29:35,918 INFO L175 Difference]: Start difference. First operand has 490 places, 646 transitions, 9905 flow. Second operand 7 states and 133 transitions. [2024-06-20 17:29:35,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 666 transitions, 11415 flow [2024-06-20 17:29:41,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 666 transitions, 11174 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-20 17:29:41,270 INFO L231 Difference]: Finished difference. Result has 487 places, 649 transitions, 9886 flow [2024-06-20 17:29:41,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9664, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9886, PETRI_PLACES=487, PETRI_TRANSITIONS=649} [2024-06-20 17:29:41,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-20 17:29:41,271 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 649 transitions, 9886 flow [2024-06-20 17:29:41,271 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) [2024-06-20 17:29:41,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:41,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:41,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 17:29:41,271 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)] === [2024-06-20 17:29:41,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash -207171857, now seen corresponding path program 1 times [2024-06-20 17:29:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:41,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456426264] [2024-06-20 17:29:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:41,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:42,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:42,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456426264] [2024-06-20 17:29:42,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456426264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:42,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:42,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:29:42,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861650835] [2024-06-20 17:29:42,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:42,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:29:42,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:42,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:29:42,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:29:42,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:29:42,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 649 transitions, 9886 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:42,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:42,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:29:42,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:44,394 INFO L124 PetriNetUnfolderBase]: 4374/6982 cut-off events. [2024-06-20 17:29:44,395 INFO L125 PetriNetUnfolderBase]: For 986109/986109 co-relation queries the response was YES. [2024-06-20 17:29:44,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64378 conditions, 6982 events. 4374/6982 cut-off events. For 986109/986109 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 45133 event pairs, 766 based on Foata normal form. 2/6981 useless extension candidates. Maximal degree in co-relation 64166. Up to 6558 conditions per place. [2024-06-20 17:29:44,528 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 614 selfloop transitions, 54 changer transitions 0/673 dead transitions. [2024-06-20 17:29:44,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 673 transitions, 11356 flow [2024-06-20 17:29:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:29:44,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 17:29:44,529 INFO L175 Difference]: Start difference. First operand has 487 places, 649 transitions, 9886 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:29:44,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 673 transitions, 11356 flow [2024-06-20 17:29:49,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 673 transitions, 11178 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:49,490 INFO L231 Difference]: Finished difference. Result has 489 places, 651 transitions, 9887 flow [2024-06-20 17:29:49,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9708, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9887, PETRI_PLACES=489, PETRI_TRANSITIONS=651} [2024-06-20 17:29:49,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-20 17:29:49,491 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 651 transitions, 9887 flow [2024-06-20 17:29:49,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:49,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:49,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:49,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 17:29:49,492 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)] === [2024-06-20 17:29:49,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:49,492 INFO L85 PathProgramCache]: Analyzing trace with hash 970285829, now seen corresponding path program 2 times [2024-06-20 17:29:49,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:49,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813754514] [2024-06-20 17:29:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:49,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:50,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:50,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813754514] [2024-06-20 17:29:50,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813754514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:50,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:50,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:29:50,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784803397] [2024-06-20 17:29:50,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:50,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:29:50,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:50,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:29:50,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:29:50,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:29:50,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 651 transitions, 9887 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:50,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:50,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:29:50,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:52,763 INFO L124 PetriNetUnfolderBase]: 4382/6982 cut-off events. [2024-06-20 17:29:52,763 INFO L125 PetriNetUnfolderBase]: For 985396/985396 co-relation queries the response was YES. [2024-06-20 17:29:52,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64459 conditions, 6982 events. 4382/6982 cut-off events. For 985396/985396 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 45125 event pairs, 774 based on Foata normal form. 2/6981 useless extension candidates. Maximal degree in co-relation 64248. Up to 6597 conditions per place. [2024-06-20 17:29:52,910 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 631 selfloop transitions, 41 changer transitions 0/677 dead transitions. [2024-06-20 17:29:52,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 677 transitions, 11421 flow [2024-06-20 17:29:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:29:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:29:52,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-20 17:29:52,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41019955654101997 [2024-06-20 17:29:52,911 INFO L175 Difference]: Start difference. First operand has 489 places, 651 transitions, 9887 flow. Second operand 11 states and 185 transitions. [2024-06-20 17:29:52,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 677 transitions, 11421 flow [2024-06-20 17:29:57,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 677 transitions, 11258 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:57,485 INFO L231 Difference]: Finished difference. Result has 494 places, 655 transitions, 9946 flow [2024-06-20 17:29:57,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9724, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9946, PETRI_PLACES=494, PETRI_TRANSITIONS=655} [2024-06-20 17:29:57,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-20 17:29:57,485 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 655 transitions, 9946 flow [2024-06-20 17:29:57,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:57,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:57,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:57,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 17:29:57,486 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)] === [2024-06-20 17:29:57,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1231174661, now seen corresponding path program 3 times [2024-06-20 17:29:57,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:57,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244099164] [2024-06-20 17:29:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:57,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:58,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:58,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244099164] [2024-06-20 17:29:58,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244099164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:58,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:58,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:29:58,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627858166] [2024-06-20 17:29:58,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:58,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:29:58,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:29:58,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:29:58,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:29:58,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 655 transitions, 9946 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:58,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:58,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:29:58,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:00,602 INFO L124 PetriNetUnfolderBase]: 4406/7002 cut-off events. [2024-06-20 17:30:00,603 INFO L125 PetriNetUnfolderBase]: For 1003013/1003013 co-relation queries the response was YES. [2024-06-20 17:30:00,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64872 conditions, 7002 events. 4406/7002 cut-off events. For 1003013/1003013 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 45104 event pairs, 820 based on Foata normal form. 2/7001 useless extension candidates. Maximal degree in co-relation 64659. Up to 6625 conditions per place. [2024-06-20 17:30:00,726 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 636 selfloop transitions, 38 changer transitions 0/679 dead transitions. [2024-06-20 17:30:00,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 679 transitions, 11494 flow [2024-06-20 17:30:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:30:00,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:30:00,727 INFO L175 Difference]: Start difference. First operand has 494 places, 655 transitions, 9946 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:30:00,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 679 transitions, 11494 flow [2024-06-20 17:30:05,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 679 transitions, 11338 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-20 17:30:05,618 INFO L231 Difference]: Finished difference. Result has 496 places, 661 transitions, 10032 flow [2024-06-20 17:30:05,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9790, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10032, PETRI_PLACES=496, PETRI_TRANSITIONS=661} [2024-06-20 17:30:05,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-20 17:30:05,619 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 661 transitions, 10032 flow [2024-06-20 17:30:05,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:05,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:05,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:05,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 17:30:05,620 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)] === [2024-06-20 17:30:05,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:05,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1425114071, now seen corresponding path program 4 times [2024-06-20 17:30:05,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:05,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864546283] [2024-06-20 17:30:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:05,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:06,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864546283] [2024-06-20 17:30:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864546283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:06,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:06,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:06,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327480585] [2024-06-20 17:30:06,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:06,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:06,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:06,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:06,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:30:06,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 661 transitions, 10032 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:06,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:06,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:30:06,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:08,952 INFO L124 PetriNetUnfolderBase]: 4414/7018 cut-off events. [2024-06-20 17:30:08,953 INFO L125 PetriNetUnfolderBase]: For 1018463/1018463 co-relation queries the response was YES. [2024-06-20 17:30:09,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65173 conditions, 7018 events. 4414/7018 cut-off events. For 1018463/1018463 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 45303 event pairs, 818 based on Foata normal form. 2/7017 useless extension candidates. Maximal degree in co-relation 64957. Up to 6617 conditions per place. [2024-06-20 17:30:09,116 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 634 selfloop transitions, 42 changer transitions 0/681 dead transitions. [2024-06-20 17:30:09,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 681 transitions, 11568 flow [2024-06-20 17:30:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:09,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 17:30:09,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-20 17:30:09,117 INFO L175 Difference]: Start difference. First operand has 496 places, 661 transitions, 10032 flow. Second operand 7 states and 128 transitions. [2024-06-20 17:30:09,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 681 transitions, 11568 flow [2024-06-20 17:30:14,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 681 transitions, 11406 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-20 17:30:14,245 INFO L231 Difference]: Finished difference. Result has 500 places, 665 transitions, 10117 flow [2024-06-20 17:30:14,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9870, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10117, PETRI_PLACES=500, PETRI_TRANSITIONS=665} [2024-06-20 17:30:14,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-20 17:30:14,245 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 665 transitions, 10117 flow [2024-06-20 17:30:14,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:14,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:14,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:14,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 17:30:14,246 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)] === [2024-06-20 17:30:14,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:14,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1432523381, now seen corresponding path program 5 times [2024-06-20 17:30:14,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:14,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795410343] [2024-06-20 17:30:14,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:14,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:15,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:15,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795410343] [2024-06-20 17:30:15,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795410343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:15,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:15,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:30:15,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216527994] [2024-06-20 17:30:15,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:15,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:30:15,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:15,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:30:15,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:30:15,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:30:15,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 665 transitions, 10117 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:15,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:15,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:30:15,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:17,773 INFO L124 PetriNetUnfolderBase]: 4422/7058 cut-off events. [2024-06-20 17:30:17,773 INFO L125 PetriNetUnfolderBase]: For 1033704/1033704 co-relation queries the response was YES. [2024-06-20 17:30:17,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65510 conditions, 7058 events. 4422/7058 cut-off events. For 1033704/1033704 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 45761 event pairs, 829 based on Foata normal form. 2/7057 useless extension candidates. Maximal degree in co-relation 65291. Up to 6704 conditions per place. [2024-06-20 17:30:17,885 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 658 selfloop transitions, 17 changer transitions 0/680 dead transitions. [2024-06-20 17:30:17,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 680 transitions, 11579 flow [2024-06-20 17:30:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:17,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:30:17,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-20 17:30:17,886 INFO L175 Difference]: Start difference. First operand has 500 places, 665 transitions, 10117 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:30:17,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 680 transitions, 11579 flow [2024-06-20 17:30:22,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 680 transitions, 11408 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-20 17:30:22,707 INFO L231 Difference]: Finished difference. Result has 503 places, 667 transitions, 10067 flow [2024-06-20 17:30:22,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9950, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10067, PETRI_PLACES=503, PETRI_TRANSITIONS=667} [2024-06-20 17:30:22,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-20 17:30:22,708 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 667 transitions, 10067 flow [2024-06-20 17:30:22,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:22,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:22,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:22,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 17:30:22,708 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)] === [2024-06-20 17:30:22,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:22,709 INFO L85 PathProgramCache]: Analyzing trace with hash -253565475, now seen corresponding path program 6 times [2024-06-20 17:30:22,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:22,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571123268] [2024-06-20 17:30:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:22,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:23,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:23,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571123268] [2024-06-20 17:30:23,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571123268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:23,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:23,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:30:23,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546581810] [2024-06-20 17:30:23,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:30:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:30:23,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:30:23,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:30:23,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 667 transitions, 10067 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:23,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:23,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:30:23,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:25,775 INFO L124 PetriNetUnfolderBase]: 4430/7050 cut-off events. [2024-06-20 17:30:25,775 INFO L125 PetriNetUnfolderBase]: For 1032327/1032327 co-relation queries the response was YES. [2024-06-20 17:30:25,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65441 conditions, 7050 events. 4430/7050 cut-off events. For 1032327/1032327 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 45627 event pairs, 821 based on Foata normal form. 2/7049 useless extension candidates. Maximal degree in co-relation 65221. Up to 6609 conditions per place. [2024-06-20 17:30:25,909 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 628 selfloop transitions, 55 changer transitions 0/688 dead transitions. [2024-06-20 17:30:25,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 688 transitions, 11885 flow [2024-06-20 17:30:25,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:25,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 17:30:25,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 17:30:25,910 INFO L175 Difference]: Start difference. First operand has 503 places, 667 transitions, 10067 flow. Second operand 7 states and 130 transitions. [2024-06-20 17:30:25,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 688 transitions, 11885 flow [2024-06-20 17:30:30,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 688 transitions, 11782 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 17:30:30,838 INFO L231 Difference]: Finished difference. Result has 505 places, 671 transitions, 10245 flow [2024-06-20 17:30:30,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9964, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10245, PETRI_PLACES=505, PETRI_TRANSITIONS=671} [2024-06-20 17:30:30,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-20 17:30:30,839 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 671 transitions, 10245 flow [2024-06-20 17:30:30,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:30,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:30,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:30,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 17:30:30,839 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)] === [2024-06-20 17:30:30,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:30,839 INFO L85 PathProgramCache]: Analyzing trace with hash -502923802, now seen corresponding path program 1 times [2024-06-20 17:30:30,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:30,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275111287] [2024-06-20 17:30:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:30,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:31,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:31,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275111287] [2024-06-20 17:30:31,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275111287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:31,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:31,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:30:31,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529744625] [2024-06-20 17:30:31,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:31,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:30:31,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:31,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:30:31,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:30:32,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:30:32,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 671 transitions, 10245 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:32,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:32,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:30:32,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:34,090 INFO L124 PetriNetUnfolderBase]: 4427/7046 cut-off events. [2024-06-20 17:30:34,091 INFO L125 PetriNetUnfolderBase]: For 1031645/1031645 co-relation queries the response was YES. [2024-06-20 17:30:34,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65467 conditions, 7046 events. 4427/7046 cut-off events. For 1031645/1031645 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 45519 event pairs, 822 based on Foata normal form. 1/7044 useless extension candidates. Maximal degree in co-relation 65246. Up to 6637 conditions per place. [2024-06-20 17:30:34,223 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 638 selfloop transitions, 53 changer transitions 0/696 dead transitions. [2024-06-20 17:30:34,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 696 transitions, 11791 flow [2024-06-20 17:30:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-20 17:30:34,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-20 17:30:34,224 INFO L175 Difference]: Start difference. First operand has 505 places, 671 transitions, 10245 flow. Second operand 7 states and 139 transitions. [2024-06-20 17:30:34,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 696 transitions, 11791 flow [2024-06-20 17:30:39,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 696 transitions, 11647 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-20 17:30:39,318 INFO L231 Difference]: Finished difference. Result has 509 places, 674 transitions, 10320 flow [2024-06-20 17:30:39,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10101, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10320, PETRI_PLACES=509, PETRI_TRANSITIONS=674} [2024-06-20 17:30:39,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-20 17:30:39,319 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 674 transitions, 10320 flow [2024-06-20 17:30:39,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:39,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:39,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:39,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 17:30:39,320 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)] === [2024-06-20 17:30:39,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:39,320 INFO L85 PathProgramCache]: Analyzing trace with hash -253572915, now seen corresponding path program 7 times [2024-06-20 17:30:39,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:39,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832235967] [2024-06-20 17:30:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:39,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:40,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:40,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832235967] [2024-06-20 17:30:40,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832235967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:40,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:40,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:30:40,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824953424] [2024-06-20 17:30:40,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:40,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:30:40,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:40,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:30:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:30:40,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:30:40,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 674 transitions, 10320 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:40,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:40,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:30:40,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:42,461 INFO L124 PetriNetUnfolderBase]: 4422/7037 cut-off events. [2024-06-20 17:30:42,462 INFO L125 PetriNetUnfolderBase]: For 1035694/1035694 co-relation queries the response was YES. [2024-06-20 17:30:42,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65534 conditions, 7037 events. 4422/7037 cut-off events. For 1035694/1035694 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 45496 event pairs, 821 based on Foata normal form. 2/7036 useless extension candidates. Maximal degree in co-relation 65311. Up to 6643 conditions per place. [2024-06-20 17:30:42,598 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 640 selfloop transitions, 48 changer transitions 0/693 dead transitions. [2024-06-20 17:30:42,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 693 transitions, 11758 flow [2024-06-20 17:30:42,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 17:30:42,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:30:42,600 INFO L175 Difference]: Start difference. First operand has 509 places, 674 transitions, 10320 flow. Second operand 7 states and 133 transitions. [2024-06-20 17:30:42,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 693 transitions, 11758 flow [2024-06-20 17:30:48,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 693 transitions, 11552 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:48,280 INFO L231 Difference]: Finished difference. Result has 510 places, 674 transitions, 10222 flow [2024-06-20 17:30:48,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10114, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10222, PETRI_PLACES=510, PETRI_TRANSITIONS=674} [2024-06-20 17:30:48,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-20 17:30:48,281 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 674 transitions, 10222 flow [2024-06-20 17:30:48,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:48,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:48,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:48,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 17:30:48,282 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)] === [2024-06-20 17:30:48,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash 978926617, now seen corresponding path program 1 times [2024-06-20 17:30:48,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:48,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293339389] [2024-06-20 17:30:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:48,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:49,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:49,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293339389] [2024-06-20 17:30:49,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293339389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:49,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:49,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:49,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552883890] [2024-06-20 17:30:49,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:49,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:49,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:49,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:49,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:49,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:30:49,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 674 transitions, 10222 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) [2024-06-20 17:30:49,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:49,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:30:49,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:51,302 INFO L124 PetriNetUnfolderBase]: 4419/7057 cut-off events. [2024-06-20 17:30:51,302 INFO L125 PetriNetUnfolderBase]: For 1019568/1019568 co-relation queries the response was YES. [2024-06-20 17:30:51,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65253 conditions, 7057 events. 4419/7057 cut-off events. For 1019568/1019568 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 45780 event pairs, 825 based on Foata normal form. 1/7055 useless extension candidates. Maximal degree in co-relation 65030. Up to 6611 conditions per place. [2024-06-20 17:30:51,441 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 653 selfloop transitions, 46 changer transitions 0/704 dead transitions. [2024-06-20 17:30:51,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 704 transitions, 11960 flow [2024-06-20 17:30:51,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:51,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:30:51,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 17:30:51,442 INFO L175 Difference]: Start difference. First operand has 510 places, 674 transitions, 10222 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:30:51,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 704 transitions, 11960 flow [2024-06-20 17:30:57,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 704 transitions, 11824 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 17:30:57,677 INFO L231 Difference]: Finished difference. Result has 514 places, 674 transitions, 10185 flow [2024-06-20 17:30:57,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10086, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10185, PETRI_PLACES=514, PETRI_TRANSITIONS=674} [2024-06-20 17:30:57,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-20 17:30:57,677 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 674 transitions, 10185 flow [2024-06-20 17:30:57,677 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) [2024-06-20 17:30:57,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:57,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:57,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 17:30:57,678 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)] === [2024-06-20 17:30:57,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:57,678 INFO L85 PathProgramCache]: Analyzing trace with hash -376823561, now seen corresponding path program 1 times [2024-06-20 17:30:57,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:57,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313198328] [2024-06-20 17:30:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:57,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:58,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:58,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313198328] [2024-06-20 17:30:58,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313198328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:58,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:58,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:58,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411058267] [2024-06-20 17:30:58,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:58,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:58,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:58,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:58,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:58,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:30:58,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 674 transitions, 10185 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) [2024-06-20 17:30:58,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:58,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:30:58,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:00,771 INFO L124 PetriNetUnfolderBase]: 4442/7089 cut-off events. [2024-06-20 17:31:00,772 INFO L125 PetriNetUnfolderBase]: For 1052652/1052652 co-relation queries the response was YES. [2024-06-20 17:31:00,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65894 conditions, 7089 events. 4442/7089 cut-off events. For 1052652/1052652 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 45962 event pairs, 822 based on Foata normal form. 2/7088 useless extension candidates. Maximal degree in co-relation 65670. Up to 6623 conditions per place. [2024-06-20 17:31:00,903 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 656 selfloop transitions, 58 changer transitions 0/719 dead transitions. [2024-06-20 17:31:00,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 719 transitions, 12272 flow [2024-06-20 17:31:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:00,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 17:31:00,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-20 17:31:00,904 INFO L175 Difference]: Start difference. First operand has 514 places, 674 transitions, 10185 flow. Second operand 9 states and 172 transitions. [2024-06-20 17:31:00,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 719 transitions, 12272 flow [2024-06-20 17:31:06,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 719 transitions, 12007 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-20 17:31:06,623 INFO L231 Difference]: Finished difference. Result has 517 places, 690 transitions, 10406 flow [2024-06-20 17:31:06,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9926, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10406, PETRI_PLACES=517, PETRI_TRANSITIONS=690} [2024-06-20 17:31:06,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 475 predicate places. [2024-06-20 17:31:06,623 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 690 transitions, 10406 flow [2024-06-20 17:31:06,623 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) [2024-06-20 17:31:06,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:06,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:06,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 17:31:06,623 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)] === [2024-06-20 17:31:06,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:06,624 INFO L85 PathProgramCache]: Analyzing trace with hash -557613729, now seen corresponding path program 2 times [2024-06-20 17:31:06,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:06,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504210963] [2024-06-20 17:31:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:06,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:07,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:07,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504210963] [2024-06-20 17:31:07,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504210963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:07,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:07,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:07,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962188783] [2024-06-20 17:31:07,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:07,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:07,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:07,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:07,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:07,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:31:07,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 690 transitions, 10406 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) [2024-06-20 17:31:07,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:07,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:31:07,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:09,918 INFO L124 PetriNetUnfolderBase]: 4447/7088 cut-off events. [2024-06-20 17:31:09,918 INFO L125 PetriNetUnfolderBase]: For 1065549/1065549 co-relation queries the response was YES. [2024-06-20 17:31:10,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66660 conditions, 7088 events. 4447/7088 cut-off events. For 1065549/1065549 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 45898 event pairs, 818 based on Foata normal form. 1/7086 useless extension candidates. Maximal degree in co-relation 66433. Up to 6673 conditions per place. [2024-06-20 17:31:10,041 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 672 selfloop transitions, 42 changer transitions 0/719 dead transitions. [2024-06-20 17:31:10,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 719 transitions, 11976 flow [2024-06-20 17:31:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:10,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:31:10,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 17:31:10,042 INFO L175 Difference]: Start difference. First operand has 517 places, 690 transitions, 10406 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:31:10,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 719 transitions, 11976 flow [2024-06-20 17:31:15,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 719 transitions, 11780 flow, removed 83 selfloop flow, removed 3 redundant places. [2024-06-20 17:31:15,370 INFO L231 Difference]: Finished difference. Result has 523 places, 693 transitions, 10370 flow [2024-06-20 17:31:15,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10210, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10370, PETRI_PLACES=523, PETRI_TRANSITIONS=693} [2024-06-20 17:31:15,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-20 17:31:15,371 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 693 transitions, 10370 flow [2024-06-20 17:31:15,371 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) [2024-06-20 17:31:15,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:15,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:15,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 17:31:15,371 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:15,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:15,371 INFO L85 PathProgramCache]: Analyzing trace with hash -550947303, now seen corresponding path program 2 times [2024-06-20 17:31:15,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:15,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774187324] [2024-06-20 17:31:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:15,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:16,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:16,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774187324] [2024-06-20 17:31:16,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774187324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:16,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:16,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:16,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249844388] [2024-06-20 17:31:16,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:16,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:16,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:16,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:16,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:16,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:31:16,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 693 transitions, 10370 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) [2024-06-20 17:31:16,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:16,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:31:16,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:18,434 INFO L124 PetriNetUnfolderBase]: 4467/7126 cut-off events. [2024-06-20 17:31:18,434 INFO L125 PetriNetUnfolderBase]: For 1086957/1086957 co-relation queries the response was YES. [2024-06-20 17:31:18,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66876 conditions, 7126 events. 4467/7126 cut-off events. For 1086957/1086957 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 46272 event pairs, 821 based on Foata normal form. 2/7125 useless extension candidates. Maximal degree in co-relation 66647. Up to 6697 conditions per place. [2024-06-20 17:31:18,578 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 669 selfloop transitions, 52 changer transitions 0/726 dead transitions. [2024-06-20 17:31:18,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 726 transitions, 12040 flow [2024-06-20 17:31:18,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:31:18,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 17:31:18,579 INFO L175 Difference]: Start difference. First operand has 523 places, 693 transitions, 10370 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:31:18,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 726 transitions, 12040 flow [2024-06-20 17:31:24,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 726 transitions, 11894 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-20 17:31:24,588 INFO L231 Difference]: Finished difference. Result has 525 places, 702 transitions, 10499 flow [2024-06-20 17:31:24,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10230, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10499, PETRI_PLACES=525, PETRI_TRANSITIONS=702} [2024-06-20 17:31:24,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-20 17:31:24,589 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 702 transitions, 10499 flow [2024-06-20 17:31:24,589 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) [2024-06-20 17:31:24,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:24,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:24,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 17:31:24,589 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:24,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:24,589 INFO L85 PathProgramCache]: Analyzing trace with hash -551184453, now seen corresponding path program 3 times [2024-06-20 17:31:24,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:24,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607340972] [2024-06-20 17:31:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:24,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:25,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:25,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607340972] [2024-06-20 17:31:25,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607340972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:25,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:25,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:25,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206290811] [2024-06-20 17:31:25,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:25,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:25,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:25,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:25,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:25,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:31:25,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 702 transitions, 10499 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) [2024-06-20 17:31:25,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:25,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:31:25,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:27,683 INFO L124 PetriNetUnfolderBase]: 4482/7145 cut-off events. [2024-06-20 17:31:27,683 INFO L125 PetriNetUnfolderBase]: For 1103195/1103195 co-relation queries the response was YES. [2024-06-20 17:31:27,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67180 conditions, 7145 events. 4482/7145 cut-off events. For 1103195/1103195 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 46331 event pairs, 821 based on Foata normal form. 2/7144 useless extension candidates. Maximal degree in co-relation 66950. Up to 6709 conditions per place. [2024-06-20 17:31:27,822 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 671 selfloop transitions, 57 changer transitions 0/733 dead transitions. [2024-06-20 17:31:27,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 733 transitions, 12146 flow [2024-06-20 17:31:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:31:27,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 17:31:27,823 INFO L175 Difference]: Start difference. First operand has 525 places, 702 transitions, 10499 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:31:27,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 733 transitions, 12146 flow [2024-06-20 17:31:33,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 733 transitions, 11988 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 17:31:33,434 INFO L231 Difference]: Finished difference. Result has 530 places, 708 transitions, 10588 flow [2024-06-20 17:31:33,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10341, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10588, PETRI_PLACES=530, PETRI_TRANSITIONS=708} [2024-06-20 17:31:33,435 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-20 17:31:33,435 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 708 transitions, 10588 flow [2024-06-20 17:31:33,435 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) [2024-06-20 17:31:33,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:33,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:33,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 17:31:33,435 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:33,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:33,435 INFO L85 PathProgramCache]: Analyzing trace with hash 266064671, now seen corresponding path program 3 times [2024-06-20 17:31:33,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:33,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979218846] [2024-06-20 17:31:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:33,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:34,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:34,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979218846] [2024-06-20 17:31:34,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979218846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:34,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:34,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:34,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852162698] [2024-06-20 17:31:34,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:34,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:34,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:34,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:34,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:34,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:31:34,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 708 transitions, 10588 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) [2024-06-20 17:31:34,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:34,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:31:34,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:36,513 INFO L124 PetriNetUnfolderBase]: 4487/7152 cut-off events. [2024-06-20 17:31:36,513 INFO L125 PetriNetUnfolderBase]: For 1107729/1107729 co-relation queries the response was YES. [2024-06-20 17:31:36,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67323 conditions, 7152 events. 4487/7152 cut-off events. For 1107729/1107729 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 46384 event pairs, 820 based on Foata normal form. 1/7150 useless extension candidates. Maximal degree in co-relation 67091. Up to 6753 conditions per place. [2024-06-20 17:31:36,649 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 691 selfloop transitions, 38 changer transitions 0/734 dead transitions. [2024-06-20 17:31:36,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 734 transitions, 12184 flow [2024-06-20 17:31:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:36,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:31:36,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 17:31:36,650 INFO L175 Difference]: Start difference. First operand has 530 places, 708 transitions, 10588 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:31:36,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 734 transitions, 12184 flow [2024-06-20 17:31:41,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 734 transitions, 12008 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 17:31:41,652 INFO L231 Difference]: Finished difference. Result has 533 places, 711 transitions, 10570 flow [2024-06-20 17:31:41,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10412, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10570, PETRI_PLACES=533, PETRI_TRANSITIONS=711} [2024-06-20 17:31:41,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-20 17:31:41,653 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 711 transitions, 10570 flow [2024-06-20 17:31:41,653 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) [2024-06-20 17:31:41,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:41,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:41,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 17:31:41,653 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:41,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:41,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2070583999, now seen corresponding path program 4 times [2024-06-20 17:31:41,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:41,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878661655] [2024-06-20 17:31:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:41,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:42,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:42,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878661655] [2024-06-20 17:31:42,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878661655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:42,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:42,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:42,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779210528] [2024-06-20 17:31:42,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:42,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:42,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:42,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:42,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:42,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:31:42,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 711 transitions, 10570 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) [2024-06-20 17:31:42,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:42,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:31:42,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:44,831 INFO L124 PetriNetUnfolderBase]: 4497/7164 cut-off events. [2024-06-20 17:31:44,831 INFO L125 PetriNetUnfolderBase]: For 1121658/1121658 co-relation queries the response was YES. [2024-06-20 17:31:44,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67399 conditions, 7164 events. 4497/7164 cut-off events. For 1121658/1121658 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 46443 event pairs, 824 based on Foata normal form. 1/7162 useless extension candidates. Maximal degree in co-relation 67166. Up to 6767 conditions per place. [2024-06-20 17:31:44,971 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 693 selfloop transitions, 37 changer transitions 0/735 dead transitions. [2024-06-20 17:31:44,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 735 transitions, 12189 flow [2024-06-20 17:31:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:44,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:44,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:31:44,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 17:31:44,972 INFO L175 Difference]: Start difference. First operand has 533 places, 711 transitions, 10570 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:31:44,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 735 transitions, 12189 flow [2024-06-20 17:31:51,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 735 transitions, 12047 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-20 17:31:51,470 INFO L231 Difference]: Finished difference. Result has 535 places, 717 transitions, 10631 flow [2024-06-20 17:31:51,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10428, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10631, PETRI_PLACES=535, PETRI_TRANSITIONS=717} [2024-06-20 17:31:51,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-20 17:31:51,471 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 717 transitions, 10631 flow [2024-06-20 17:31:51,471 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) [2024-06-20 17:31:51,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:51,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:51,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 17:31:51,471 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:51,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:51,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2070583813, now seen corresponding path program 4 times [2024-06-20 17:31:51,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:51,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299578149] [2024-06-20 17:31:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:51,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:52,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:52,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299578149] [2024-06-20 17:31:52,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299578149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:52,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:52,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:52,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212591398] [2024-06-20 17:31:52,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:52,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:52,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:52,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:52,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:52,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:31:52,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 717 transitions, 10631 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) [2024-06-20 17:31:52,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:52,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:31:52,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:54,684 INFO L124 PetriNetUnfolderBase]: 4523/7200 cut-off events. [2024-06-20 17:31:54,684 INFO L125 PetriNetUnfolderBase]: For 1164248/1164248 co-relation queries the response was YES. [2024-06-20 17:31:54,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68182 conditions, 7200 events. 4523/7200 cut-off events. For 1164248/1164248 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 46667 event pairs, 826 based on Foata normal form. 2/7199 useless extension candidates. Maximal degree in co-relation 67948. Up to 6763 conditions per place. [2024-06-20 17:31:54,814 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 685 selfloop transitions, 55 changer transitions 0/745 dead transitions. [2024-06-20 17:31:54,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 745 transitions, 12626 flow [2024-06-20 17:31:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:31:54,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:31:54,815 INFO L175 Difference]: Start difference. First operand has 535 places, 717 transitions, 10631 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:31:54,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 745 transitions, 12626 flow [2024-06-20 17:32:01,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 745 transitions, 12481 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 17:32:01,345 INFO L231 Difference]: Finished difference. Result has 538 places, 724 transitions, 10789 flow [2024-06-20 17:32:01,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10486, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10789, PETRI_PLACES=538, PETRI_TRANSITIONS=724} [2024-06-20 17:32:01,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 496 predicate places. [2024-06-20 17:32:01,345 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 724 transitions, 10789 flow [2024-06-20 17:32:01,345 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) [2024-06-20 17:32:01,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:01,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:01,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 17:32:01,346 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:01,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:01,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2007343591, now seen corresponding path program 5 times [2024-06-20 17:32:01,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:01,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830350200] [2024-06-20 17:32:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:01,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:02,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:02,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830350200] [2024-06-20 17:32:02,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830350200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:02,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:02,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:02,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362299731] [2024-06-20 17:32:02,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:02,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:02,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:02,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:32:02,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 724 transitions, 10789 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) [2024-06-20 17:32:02,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:02,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:32:02,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:04,488 INFO L124 PetriNetUnfolderBase]: 4538/7223 cut-off events. [2024-06-20 17:32:04,488 INFO L125 PetriNetUnfolderBase]: For 1181017/1181017 co-relation queries the response was YES. [2024-06-20 17:32:04,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68526 conditions, 7223 events. 4538/7223 cut-off events. For 1181017/1181017 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 46832 event pairs, 826 based on Foata normal form. 2/7222 useless extension candidates. Maximal degree in co-relation 68292. Up to 6795 conditions per place. [2024-06-20 17:32:04,628 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 691 selfloop transitions, 53 changer transitions 0/749 dead transitions. [2024-06-20 17:32:04,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 749 transitions, 12464 flow [2024-06-20 17:32:04,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:32:04,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:32:04,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:32:04,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 17:32:04,629 INFO L175 Difference]: Start difference. First operand has 538 places, 724 transitions, 10789 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:32:04,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 749 transitions, 12464 flow [2024-06-20 17:32:11,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 749 transitions, 12364 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-20 17:32:11,551 INFO L231 Difference]: Finished difference. Result has 544 places, 730 transitions, 10934 flow [2024-06-20 17:32:11,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10689, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10934, PETRI_PLACES=544, PETRI_TRANSITIONS=730} [2024-06-20 17:32:11,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 502 predicate places. [2024-06-20 17:32:11,551 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 730 transitions, 10934 flow [2024-06-20 17:32:11,551 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) [2024-06-20 17:32:11,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:11,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:11,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 17:32:11,551 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:11,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1699448713, now seen corresponding path program 6 times [2024-06-20 17:32:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:11,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126086850] [2024-06-20 17:32:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:11,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:12,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:12,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126086850] [2024-06-20 17:32:12,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126086850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:12,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:12,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:12,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119035122] [2024-06-20 17:32:12,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:12,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:12,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:12,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:12,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:32:12,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 730 transitions, 10934 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) [2024-06-20 17:32:12,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:12,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:32:12,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:14,626 INFO L124 PetriNetUnfolderBase]: 4532/7221 cut-off events. [2024-06-20 17:32:14,627 INFO L125 PetriNetUnfolderBase]: For 1178128/1178128 co-relation queries the response was YES. [2024-06-20 17:32:14,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68295 conditions, 7221 events. 4532/7221 cut-off events. For 1178128/1178128 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 46842 event pairs, 825 based on Foata normal form. 2/7220 useless extension candidates. Maximal degree in co-relation 68059. Up to 6787 conditions per place. [2024-06-20 17:32:14,769 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 690 selfloop transitions, 54 changer transitions 0/749 dead transitions. [2024-06-20 17:32:14,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 749 transitions, 12482 flow [2024-06-20 17:32:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:32:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:32:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 17:32:14,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 17:32:14,770 INFO L175 Difference]: Start difference. First operand has 544 places, 730 transitions, 10934 flow. Second operand 9 states and 160 transitions. [2024-06-20 17:32:14,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 749 transitions, 12482 flow [2024-06-20 17:32:20,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 749 transitions, 12236 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-20 17:32:20,523 INFO L231 Difference]: Finished difference. Result has 547 places, 730 transitions, 10802 flow [2024-06-20 17:32:20,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10688, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10802, PETRI_PLACES=547, PETRI_TRANSITIONS=730} [2024-06-20 17:32:20,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 505 predicate places. [2024-06-20 17:32:20,523 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 730 transitions, 10802 flow [2024-06-20 17:32:20,523 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) [2024-06-20 17:32:20,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:20,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:20,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 17:32:20,524 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:20,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:20,524 INFO L85 PathProgramCache]: Analyzing trace with hash -879977061, now seen corresponding path program 1 times [2024-06-20 17:32:20,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:20,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763100073] [2024-06-20 17:32:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:20,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:21,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:21,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763100073] [2024-06-20 17:32:21,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763100073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:21,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:21,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:21,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784747877] [2024-06-20 17:32:21,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:21,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:21,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:21,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:21,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:21,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:32:21,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 730 transitions, 10802 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) [2024-06-20 17:32:21,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:21,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:32:21,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:23,905 INFO L124 PetriNetUnfolderBase]: 4628/7377 cut-off events. [2024-06-20 17:32:23,905 INFO L125 PetriNetUnfolderBase]: For 1249220/1249220 co-relation queries the response was YES. [2024-06-20 17:32:24,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69180 conditions, 7377 events. 4628/7377 cut-off events. For 1249220/1249220 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 48040 event pairs, 733 based on Foata normal form. 8/7382 useless extension candidates. Maximal degree in co-relation 68943. Up to 6646 conditions per place. [2024-06-20 17:32:24,289 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 695 selfloop transitions, 73 changer transitions 0/773 dead transitions. [2024-06-20 17:32:24,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 773 transitions, 12898 flow [2024-06-20 17:32:24,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:32:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:32:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 17:32:24,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-20 17:32:24,291 INFO L175 Difference]: Start difference. First operand has 547 places, 730 transitions, 10802 flow. Second operand 9 states and 178 transitions. [2024-06-20 17:32:24,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 773 transitions, 12898 flow [2024-06-20 17:32:30,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 773 transitions, 12766 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 17:32:30,163 INFO L231 Difference]: Finished difference. Result has 550 places, 736 transitions, 10924 flow [2024-06-20 17:32:30,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10670, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10924, PETRI_PLACES=550, PETRI_TRANSITIONS=736} [2024-06-20 17:32:30,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 508 predicate places. [2024-06-20 17:32:30,164 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 736 transitions, 10924 flow [2024-06-20 17:32:30,164 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) [2024-06-20 17:32:30,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:30,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:30,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 17:32:30,164 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:30,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:30,165 INFO L85 PathProgramCache]: Analyzing trace with hash 897798067, now seen corresponding path program 2 times [2024-06-20 17:32:30,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:30,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846684925] [2024-06-20 17:32:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:30,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:31,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:31,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846684925] [2024-06-20 17:32:31,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846684925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:31,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:31,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:31,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766238726] [2024-06-20 17:32:31,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:31,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:31,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:31,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:31,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:31,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:32:31,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 736 transitions, 10924 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) [2024-06-20 17:32:31,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:31,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:32:31,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:33,526 INFO L124 PetriNetUnfolderBase]: 4705/7496 cut-off events. [2024-06-20 17:32:33,526 INFO L125 PetriNetUnfolderBase]: For 1269542/1269542 co-relation queries the response was YES. [2024-06-20 17:32:33,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70443 conditions, 7496 events. 4705/7496 cut-off events. For 1269542/1269542 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 48954 event pairs, 850 based on Foata normal form. 8/7501 useless extension candidates. Maximal degree in co-relation 70203. Up to 6950 conditions per place. [2024-06-20 17:32:33,674 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 698 selfloop transitions, 72 changer transitions 0/775 dead transitions. [2024-06-20 17:32:33,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 775 transitions, 12771 flow [2024-06-20 17:32:33,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:32:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:32:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 17:32:33,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-20 17:32:33,675 INFO L175 Difference]: Start difference. First operand has 550 places, 736 transitions, 10924 flow. Second operand 9 states and 175 transitions. [2024-06-20 17:32:33,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 775 transitions, 12771 flow [2024-06-20 17:32:39,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 775 transitions, 12648 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 17:32:39,642 INFO L231 Difference]: Finished difference. Result has 556 places, 743 transitions, 11065 flow [2024-06-20 17:32:39,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10811, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11065, PETRI_PLACES=556, PETRI_TRANSITIONS=743} [2024-06-20 17:32:39,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 514 predicate places. [2024-06-20 17:32:39,642 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 743 transitions, 11065 flow [2024-06-20 17:32:39,642 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) [2024-06-20 17:32:39,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:39,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:39,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 17:32:39,642 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:39,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2070676069, now seen corresponding path program 3 times [2024-06-20 17:32:39,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:39,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538846268] [2024-06-20 17:32:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:39,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:40,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:40,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538846268] [2024-06-20 17:32:40,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538846268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:40,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:40,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:40,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715522260] [2024-06-20 17:32:40,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:40,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:40,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:40,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:40,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:40,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:32:40,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 743 transitions, 11065 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) [2024-06-20 17:32:40,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:40,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:32:40,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:42,988 INFO L124 PetriNetUnfolderBase]: 4741/7552 cut-off events. [2024-06-20 17:32:42,988 INFO L125 PetriNetUnfolderBase]: For 1287648/1287648 co-relation queries the response was YES. [2024-06-20 17:32:43,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70873 conditions, 7552 events. 4741/7552 cut-off events. For 1287648/1287648 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 49391 event pairs, 860 based on Foata normal form. 8/7557 useless extension candidates. Maximal degree in co-relation 70631. Up to 7004 conditions per place. [2024-06-20 17:32:43,147 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 701 selfloop transitions, 67 changer transitions 0/773 dead transitions. [2024-06-20 17:32:43,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 773 transitions, 12837 flow [2024-06-20 17:32:43,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:32:43,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:32:43,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:32:43,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 17:32:43,148 INFO L175 Difference]: Start difference. First operand has 556 places, 743 transitions, 11065 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:32:43,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 773 transitions, 12837 flow [2024-06-20 17:32:50,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 773 transitions, 12690 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:32:50,133 INFO L231 Difference]: Finished difference. Result has 561 places, 746 transitions, 11116 flow [2024-06-20 17:32:50,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10918, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11116, PETRI_PLACES=561, PETRI_TRANSITIONS=746} [2024-06-20 17:32:50,134 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 519 predicate places. [2024-06-20 17:32:50,134 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 746 transitions, 11116 flow [2024-06-20 17:32:50,134 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) [2024-06-20 17:32:50,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:50,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:50,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 17:32:50,134 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:50,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:50,135 INFO L85 PathProgramCache]: Analyzing trace with hash -465606083, now seen corresponding path program 1 times [2024-06-20 17:32:50,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:50,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660611642] [2024-06-20 17:32:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:50,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:51,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:51,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660611642] [2024-06-20 17:32:51,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660611642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:51,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:51,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:32:51,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332166195] [2024-06-20 17:32:51,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:51,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:32:51,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:51,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:32:51,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:32:51,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:32:51,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 746 transitions, 11116 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:51,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:51,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:32:51,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:53,978 INFO L124 PetriNetUnfolderBase]: 4857/7723 cut-off events. [2024-06-20 17:32:53,979 INFO L125 PetriNetUnfolderBase]: For 1459031/1459031 co-relation queries the response was YES. [2024-06-20 17:32:54,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74368 conditions, 7723 events. 4857/7723 cut-off events. For 1459031/1459031 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 50481 event pairs, 869 based on Foata normal form. 12/7732 useless extension candidates. Maximal degree in co-relation 74124. Up to 6847 conditions per place. [2024-06-20 17:32:54,114 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 701 selfloop transitions, 87 changer transitions 0/793 dead transitions. [2024-06-20 17:32:54,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 793 transitions, 13472 flow [2024-06-20 17:32:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:32:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:32:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 17:32:54,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47804878048780486 [2024-06-20 17:32:54,115 INFO L175 Difference]: Start difference. First operand has 561 places, 746 transitions, 11116 flow. Second operand 10 states and 196 transitions. [2024-06-20 17:32:54,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 793 transitions, 13472 flow [2024-06-20 17:33:01,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 793 transitions, 13336 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:33:01,495 INFO L231 Difference]: Finished difference. Result has 567 places, 750 transitions, 11312 flow [2024-06-20 17:33:01,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10980, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11312, PETRI_PLACES=567, PETRI_TRANSITIONS=750} [2024-06-20 17:33:01,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 525 predicate places. [2024-06-20 17:33:01,495 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 750 transitions, 11312 flow [2024-06-20 17:33:01,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:01,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:01,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:01,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 17:33:01,496 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:01,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:01,496 INFO L85 PathProgramCache]: Analyzing trace with hash 298127417, now seen corresponding path program 2 times [2024-06-20 17:33:01,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:01,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956426804] [2024-06-20 17:33:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:01,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:02,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:02,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956426804] [2024-06-20 17:33:02,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956426804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:02,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:02,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:33:02,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055566501] [2024-06-20 17:33:02,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:02,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:33:02,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:02,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:33:02,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:33:02,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:33:02,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 750 transitions, 11312 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:02,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:02,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:33:02,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:05,003 INFO L124 PetriNetUnfolderBase]: 4901/7798 cut-off events. [2024-06-20 17:33:05,003 INFO L125 PetriNetUnfolderBase]: For 1487993/1487993 co-relation queries the response was YES. [2024-06-20 17:33:05,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75960 conditions, 7798 events. 4901/7798 cut-off events. For 1487993/1487993 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 51083 event pairs, 904 based on Foata normal form. 12/7807 useless extension candidates. Maximal degree in co-relation 75714. Up to 7238 conditions per place. [2024-06-20 17:33:05,165 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 698 selfloop transitions, 84 changer transitions 0/787 dead transitions. [2024-06-20 17:33:05,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 787 transitions, 13194 flow [2024-06-20 17:33:05,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:33:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:33:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-20 17:33:05,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501108647450111 [2024-06-20 17:33:05,166 INFO L175 Difference]: Start difference. First operand has 567 places, 750 transitions, 11312 flow. Second operand 11 states and 203 transitions. [2024-06-20 17:33:05,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 787 transitions, 13194 flow [2024-06-20 17:33:12,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 787 transitions, 13018 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 17:33:12,982 INFO L231 Difference]: Finished difference. Result has 572 places, 752 transitions, 11381 flow [2024-06-20 17:33:12,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11154, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11381, PETRI_PLACES=572, PETRI_TRANSITIONS=752} [2024-06-20 17:33:12,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 530 predicate places. [2024-06-20 17:33:12,983 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 752 transitions, 11381 flow [2024-06-20 17:33:12,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:12,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:12,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:12,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 17:33:12,984 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:12,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:12,984 INFO L85 PathProgramCache]: Analyzing trace with hash -465545509, now seen corresponding path program 1 times [2024-06-20 17:33:12,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:12,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306618712] [2024-06-20 17:33:12,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:12,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:13,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:13,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306618712] [2024-06-20 17:33:13,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306618712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:13,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:13,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:33:13,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290159176] [2024-06-20 17:33:13,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:13,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:33:13,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:13,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:33:13,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:33:14,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:33:14,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 752 transitions, 11381 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:14,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:14,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:33:14,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:16,818 INFO L124 PetriNetUnfolderBase]: 4953/7870 cut-off events. [2024-06-20 17:33:16,818 INFO L125 PetriNetUnfolderBase]: For 1477467/1477467 co-relation queries the response was YES. [2024-06-20 17:33:16,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77641 conditions, 7870 events. 4953/7870 cut-off events. For 1477467/1477467 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 51490 event pairs, 864 based on Foata normal form. 4/7871 useless extension candidates. Maximal degree in co-relation 77393. Up to 6954 conditions per place. [2024-06-20 17:33:16,976 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 664 selfloop transitions, 131 changer transitions 0/800 dead transitions. [2024-06-20 17:33:16,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 800 transitions, 13841 flow [2024-06-20 17:33:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:33:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:33:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 226 transitions. [2024-06-20 17:33:16,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-20 17:33:16,978 INFO L175 Difference]: Start difference. First operand has 572 places, 752 transitions, 11381 flow. Second operand 12 states and 226 transitions. [2024-06-20 17:33:16,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 800 transitions, 13841 flow [2024-06-20 17:33:25,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 800 transitions, 13658 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 17:33:25,571 INFO L231 Difference]: Finished difference. Result has 576 places, 760 transitions, 11815 flow [2024-06-20 17:33:25,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11198, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11815, PETRI_PLACES=576, PETRI_TRANSITIONS=760} [2024-06-20 17:33:25,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 534 predicate places. [2024-06-20 17:33:25,572 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 760 transitions, 11815 flow [2024-06-20 17:33:25,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:25,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:25,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:25,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 17:33:25,572 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:25,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:25,573 INFO L85 PathProgramCache]: Analyzing trace with hash -347453179, now seen corresponding path program 2 times [2024-06-20 17:33:25,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:25,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338053884] [2024-06-20 17:33:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:25,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:26,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:26,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338053884] [2024-06-20 17:33:26,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338053884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:26,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:26,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:33:26,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299162122] [2024-06-20 17:33:26,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:26,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:33:26,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:26,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:33:26,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:33:26,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:33:26,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 760 transitions, 11815 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:26,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:26,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:33:26,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:29,595 INFO L124 PetriNetUnfolderBase]: 4973/7908 cut-off events. [2024-06-20 17:33:29,596 INFO L125 PetriNetUnfolderBase]: For 1516886/1516886 co-relation queries the response was YES. [2024-06-20 17:33:29,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79581 conditions, 7908 events. 4973/7908 cut-off events. For 1516886/1516886 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 51827 event pairs, 878 based on Foata normal form. 4/7909 useless extension candidates. Maximal degree in co-relation 79331. Up to 7325 conditions per place. [2024-06-20 17:33:29,744 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 717 selfloop transitions, 73 changer transitions 0/795 dead transitions. [2024-06-20 17:33:29,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 795 transitions, 13837 flow [2024-06-20 17:33:29,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:33:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:33:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 17:33:29,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 17:33:29,745 INFO L175 Difference]: Start difference. First operand has 576 places, 760 transitions, 11815 flow. Second operand 10 states and 187 transitions. [2024-06-20 17:33:29,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 795 transitions, 13837 flow [2024-06-20 17:33:38,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 795 transitions, 13451 flow, removed 124 selfloop flow, removed 8 redundant places. [2024-06-20 17:33:38,178 INFO L231 Difference]: Finished difference. Result has 578 places, 764 transitions, 11752 flow [2024-06-20 17:33:38,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11483, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11752, PETRI_PLACES=578, PETRI_TRANSITIONS=764} [2024-06-20 17:33:38,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 536 predicate places. [2024-06-20 17:33:38,178 INFO L495 AbstractCegarLoop]: Abstraction has has 578 places, 764 transitions, 11752 flow [2024-06-20 17:33:38,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:38,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:38,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:38,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 17:33:38,179 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:38,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:38,179 INFO L85 PathProgramCache]: Analyzing trace with hash -347457829, now seen corresponding path program 3 times [2024-06-20 17:33:38,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:38,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60719504] [2024-06-20 17:33:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:38,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:39,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:39,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60719504] [2024-06-20 17:33:39,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60719504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:39,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:39,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:33:39,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858275849] [2024-06-20 17:33:39,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:39,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:33:39,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:39,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:33:39,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:33:39,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:33:39,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 764 transitions, 11752 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:39,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:39,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:33:39,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:42,333 INFO L124 PetriNetUnfolderBase]: 5025/7982 cut-off events. [2024-06-20 17:33:42,333 INFO L125 PetriNetUnfolderBase]: For 1572621/1572621 co-relation queries the response was YES. [2024-06-20 17:33:42,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80747 conditions, 7982 events. 5025/7982 cut-off events. For 1572621/1572621 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 52319 event pairs, 880 based on Foata normal form. 4/7983 useless extension candidates. Maximal degree in co-relation 80495. Up to 7357 conditions per place. [2024-06-20 17:33:42,488 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 714 selfloop transitions, 87 changer transitions 0/806 dead transitions. [2024-06-20 17:33:42,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 806 transitions, 14162 flow [2024-06-20 17:33:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:33:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:33:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-20 17:33:42,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 17:33:42,489 INFO L175 Difference]: Start difference. First operand has 578 places, 764 transitions, 11752 flow. Second operand 11 states and 205 transitions. [2024-06-20 17:33:42,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 806 transitions, 14162 flow [2024-06-20 17:33:50,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 806 transitions, 13935 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-20 17:33:50,609 INFO L231 Difference]: Finished difference. Result has 581 places, 772 transitions, 11952 flow [2024-06-20 17:33:50,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11525, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11952, PETRI_PLACES=581, PETRI_TRANSITIONS=772} [2024-06-20 17:33:50,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 539 predicate places. [2024-06-20 17:33:50,610 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 772 transitions, 11952 flow [2024-06-20 17:33:50,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:50,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:50,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:50,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 17:33:50,610 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:50,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:50,611 INFO L85 PathProgramCache]: Analyzing trace with hash -347457953, now seen corresponding path program 3 times [2024-06-20 17:33:50,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:50,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072022714] [2024-06-20 17:33:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:50,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:51,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:51,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072022714] [2024-06-20 17:33:51,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072022714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:51,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:51,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:33:51,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858507888] [2024-06-20 17:33:51,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:51,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:33:51,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:51,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:33:51,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:33:51,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:33:51,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 772 transitions, 11952 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:51,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:51,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:33:51,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:54,819 INFO L124 PetriNetUnfolderBase]: 5033/7984 cut-off events. [2024-06-20 17:33:54,819 INFO L125 PetriNetUnfolderBase]: For 1573114/1573114 co-relation queries the response was YES. [2024-06-20 17:33:54,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80918 conditions, 7984 events. 5033/7984 cut-off events. For 1573114/1573114 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 52182 event pairs, 913 based on Foata normal form. 2/7983 useless extension candidates. Maximal degree in co-relation 80665. Up to 7579 conditions per place. [2024-06-20 17:33:55,068 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 756 selfloop transitions, 36 changer transitions 0/797 dead transitions. [2024-06-20 17:33:55,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 797 transitions, 13654 flow [2024-06-20 17:33:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:33:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:33:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-20 17:33:55,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-20 17:33:55,070 INFO L175 Difference]: Start difference. First operand has 581 places, 772 transitions, 11952 flow. Second operand 10 states and 172 transitions. [2024-06-20 17:33:55,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 797 transitions, 13654 flow [2024-06-20 17:34:03,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 797 transitions, 13473 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-20 17:34:03,704 INFO L231 Difference]: Finished difference. Result has 585 places, 775 transitions, 11914 flow [2024-06-20 17:34:03,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11771, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11914, PETRI_PLACES=585, PETRI_TRANSITIONS=775} [2024-06-20 17:34:03,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 543 predicate places. [2024-06-20 17:34:03,705 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 775 transitions, 11914 flow [2024-06-20 17:34:03,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:03,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:03,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:03,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 17:34:03,706 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:34:03,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash -347273255, now seen corresponding path program 1 times [2024-06-20 17:34:03,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:03,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941912428] [2024-06-20 17:34:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:03,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:04,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941912428] [2024-06-20 17:34:04,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941912428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:04,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:04,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:34:04,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967299390] [2024-06-20 17:34:04,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:04,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:34:04,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:04,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:34:04,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:34:04,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:34:04,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 775 transitions, 11914 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:04,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:04,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:34:04,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:07,856 INFO L124 PetriNetUnfolderBase]: 5077/8076 cut-off events. [2024-06-20 17:34:07,856 INFO L125 PetriNetUnfolderBase]: For 1694365/1694365 co-relation queries the response was YES. [2024-06-20 17:34:07,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81702 conditions, 8076 events. 5077/8076 cut-off events. For 1694365/1694365 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 53122 event pairs, 896 based on Foata normal form. 12/8085 useless extension candidates. Maximal degree in co-relation 81446. Up to 7485 conditions per place. [2024-06-20 17:34:08,006 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 740 selfloop transitions, 61 changer transitions 0/806 dead transitions. [2024-06-20 17:34:08,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 806 transitions, 13854 flow [2024-06-20 17:34:08,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:34:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:34:08,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:34:08,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 17:34:08,007 INFO L175 Difference]: Start difference. First operand has 585 places, 775 transitions, 11914 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:34:08,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 806 transitions, 13854 flow [2024-06-20 17:34:17,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 806 transitions, 13753 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:34:17,306 INFO L231 Difference]: Finished difference. Result has 589 places, 776 transitions, 11974 flow [2024-06-20 17:34:17,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11813, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11974, PETRI_PLACES=589, PETRI_TRANSITIONS=776} [2024-06-20 17:34:17,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 547 predicate places. [2024-06-20 17:34:17,307 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 776 transitions, 11974 flow [2024-06-20 17:34:17,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:17,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:17,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:17,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 17:34:17,307 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:34:17,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:17,308 INFO L85 PathProgramCache]: Analyzing trace with hash -284277127, now seen corresponding path program 4 times [2024-06-20 17:34:17,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:17,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834621204] [2024-06-20 17:34:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:17,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:18,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:18,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834621204] [2024-06-20 17:34:18,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834621204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:18,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:18,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:34:18,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414373698] [2024-06-20 17:34:18,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:18,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:34:18,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:18,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:34:18,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:34:18,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:34:18,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 776 transitions, 11974 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:18,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:18,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:34:18,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:21,541 INFO L124 PetriNetUnfolderBase]: 5065/8060 cut-off events. [2024-06-20 17:34:21,542 INFO L125 PetriNetUnfolderBase]: For 1593893/1593893 co-relation queries the response was YES. [2024-06-20 17:34:21,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81193 conditions, 8060 events. 5065/8060 cut-off events. For 1593893/1593893 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 53002 event pairs, 888 based on Foata normal form. 4/8061 useless extension candidates. Maximal degree in co-relation 80936. Up to 7461 conditions per place. [2024-06-20 17:34:21,869 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 728 selfloop transitions, 75 changer transitions 0/808 dead transitions. [2024-06-20 17:34:21,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 808 transitions, 13860 flow [2024-06-20 17:34:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:34:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:34:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 215 transitions. [2024-06-20 17:34:21,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369918699186992 [2024-06-20 17:34:21,870 INFO L175 Difference]: Start difference. First operand has 589 places, 776 transitions, 11974 flow. Second operand 12 states and 215 transitions. [2024-06-20 17:34:21,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 808 transitions, 13860 flow Killed by 15