./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix002.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix002.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix002.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix002.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-eb4cb34-m [2024-06-21 16:08:44,178 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:08:44,254 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:08:44,258 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:08:44,259 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:08:44,288 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:08:44,289 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:08:44,289 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:08:44,290 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:08:44,294 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:08:44,294 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:08:44,294 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:08:44,295 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:08:44,296 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:08:44,297 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:08:44,297 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:08:44,297 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:08:44,298 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:08:44,298 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:08:44,298 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:08:44,298 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:08:44,299 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:08:44,299 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:08:44,299 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:08:44,300 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:08:44,300 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:08:44,300 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:08:44,301 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:08:44,301 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:08:44,301 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:08:44,302 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:08:44,303 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:08:44,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:08:44,303 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:08:44,303 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:08:44,304 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:08:44,304 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:08:44,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:08:44,304 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:08:44,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:08:44,305 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:08:44,305 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:08:44,305 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:08:44,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:08:44,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:08:44,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:08:44,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:08:44,597 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:08:44,597 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:08:44,598 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix002.opt.i [2024-06-21 16:08:45,769 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:08:46,011 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:08:46,011 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix002.opt.i [2024-06-21 16:08:46,025 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6102d1438/7c8561a9f87f494985b195fc563271a2/FLAGd576ef82f [2024-06-21 16:08:46,040 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6102d1438/7c8561a9f87f494985b195fc563271a2 [2024-06-21 16:08:46,042 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:08:46,042 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:08:46,043 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix002.opt.yml/witness.yml [2024-06-21 16:08:46,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:08:46,217 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:08:46,218 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:08:46,219 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:08:46,224 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:08:46,225 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:08:46" (1/2) ... [2024-06-21 16:08:46,226 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f371465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:08:46, skipping insertion in model container [2024-06-21 16:08:46,226 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:08:46" (1/2) ... [2024-06-21 16:08:46,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6398b8be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:08:46, skipping insertion in model container [2024-06-21 16:08:46,229 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:08:46" (2/2) ... [2024-06-21 16:08:46,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f371465 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46, skipping insertion in model container [2024-06-21 16:08:46,230 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:08:46" (2/2) ... [2024-06-21 16:08:46,230 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:08:46,334 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:08:46,336 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0) [2024-06-21 16:08:46,336 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0) [2024-06-21 16:08:46,336 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0) [2024-06-21 16:08:46,336 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:08:46,336 INFO L106 edCorrectnessWitness]: ghost_update [L859-L859] multithreaded = 1; [2024-06-21 16:08:46,382 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:08:46,769 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:08:46,780 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:08:46,907 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:08:46,941 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:08:46,941 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46 WrapperNode [2024-06-21 16:08:46,942 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:08:46,943 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:08:46,943 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:08:46,943 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:08:46,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46" (1/1) ... [2024-06-21 16:08:46,966 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46" (1/1) ... [2024-06-21 16:08:47,022 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 152 [2024-06-21 16:08:47,023 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:08:47,024 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:08:47,024 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:08:47,024 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:08:47,034 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46" (1/1) ... [2024-06-21 16:08:47,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46" (1/1) ... [2024-06-21 16:08:47,054 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46" (1/1) ... [2024-06-21 16:08:47,072 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]. [2024-06-21 16:08:47,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46" (1/1) ... [2024-06-21 16:08:47,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46" (1/1) ... [2024-06-21 16:08:47,093 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46" (1/1) ... [2024-06-21 16:08:47,095 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46" (1/1) ... [2024-06-21 16:08:47,097 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46" (1/1) ... [2024-06-21 16:08:47,099 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46" (1/1) ... [2024-06-21 16:08:47,102 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:08:47,103 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:08:47,103 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:08:47,103 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:08:47,104 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46" (1/1) ... [2024-06-21 16:08:47,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:08:47,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:08:47,133 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) [2024-06-21 16:08:47,160 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 [2024-06-21 16:08:47,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:08:47,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:08:47,175 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:08:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:08:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:08:47,176 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:08:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:08:47,176 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:08:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:08:47,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:08:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:08:47,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:08:47,178 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:08:47,338 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:08:47,342 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:08:47,809 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:08:47,809 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:08:47,987 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:08:47,987 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:08:47,988 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:08:47 BoogieIcfgContainer [2024-06-21 16:08:47,989 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:08:47,992 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:08:47,992 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:08:47,995 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:08:47,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:08:46" (1/4) ... [2024-06-21 16:08:47,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22334d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:08:47, skipping insertion in model container [2024-06-21 16:08:47,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:08:46" (2/4) ... [2024-06-21 16:08:47,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22334d56 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:08:47, skipping insertion in model container [2024-06-21 16:08:47,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:08:46" (3/4) ... [2024-06-21 16:08:47,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22334d56 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:08:47, skipping insertion in model container [2024-06-21 16:08:47,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:08:47" (4/4) ... [2024-06-21 16:08:48,000 INFO L112 eAbstractionObserver]: Analyzing ICFG mix002.opt.i [2024-06-21 16:08:48,015 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:08:48,015 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:08:48,015 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:08:48,060 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:08:48,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 16:08:48,126 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-21 16:08:48,127 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:08:48,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:08:48,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 16:08:48,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-21 16:08:48,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:08:48,157 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;@29cdde0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:08:48,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:08:48,162 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:08:48,162 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:08:48,163 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:08:48,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:48,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:08:48,164 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)] === [2024-06-21 16:08:48,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:48,168 INFO L85 PathProgramCache]: Analyzing trace with hash 406084588, now seen corresponding path program 1 times [2024-06-21 16:08:48,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:48,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133719073] [2024-06-21 16:08:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:48,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:49,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:49,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133719073] [2024-06-21 16:08:49,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133719073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:49,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:49,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:08:49,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366579860] [2024-06-21 16:08:49,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:49,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:08:49,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:49,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:08:49,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:08:49,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-21 16:08:49,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:49,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:49,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-21 16:08:49,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:50,215 INFO L124 PetriNetUnfolderBase]: 1116/1792 cut-off events. [2024-06-21 16:08:50,215 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 16:08:50,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3543 conditions, 1792 events. 1116/1792 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9553 event pairs, 765 based on Foata normal form. 1/1724 useless extension candidates. Maximal degree in co-relation 3531. Up to 1676 conditions per place. [2024-06-21 16:08:50,231 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 31 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 16:08:50,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 175 flow [2024-06-21 16:08:50,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:08:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:08:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-21 16:08:50,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-06-21 16:08:50,245 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 86 transitions. [2024-06-21 16:08:50,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 175 flow [2024-06-21 16:08:50,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:08:50,253 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-21 16:08:50,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 16:08:50,258 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-21 16:08:50,258 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-21 16:08:50,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:50,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:50,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:50,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:08:50,259 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)] === [2024-06-21 16:08:50,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:50,260 INFO L85 PathProgramCache]: Analyzing trace with hash -594026213, now seen corresponding path program 1 times [2024-06-21 16:08:50,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:50,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337174356] [2024-06-21 16:08:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:50,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:51,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:51,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337174356] [2024-06-21 16:08:51,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337174356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:51,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:51,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:08:51,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219636767] [2024-06-21 16:08:51,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:51,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:08:51,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:08:51,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:08:51,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-21 16:08:51,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:51,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:51,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-21 16:08:51,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:51,893 INFO L124 PetriNetUnfolderBase]: 1280/1988 cut-off events. [2024-06-21 16:08:51,893 INFO L125 PetriNetUnfolderBase]: For 406/406 co-relation queries the response was YES. [2024-06-21 16:08:51,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4509 conditions, 1988 events. 1280/1988 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10399 event pairs, 750 based on Foata normal form. 3/1970 useless extension candidates. Maximal degree in co-relation 4497. Up to 1897 conditions per place. [2024-06-21 16:08:51,907 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 39 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-21 16:08:51,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 244 flow [2024-06-21 16:08:51,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:08:51,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:08:51,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-21 16:08:51,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193181818181818 [2024-06-21 16:08:51,912 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 109 transitions. [2024-06-21 16:08:51,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 244 flow [2024-06-21 16:08:51,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:08:51,917 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-21 16:08:51,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 16:08:51,918 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-21 16:08:51,918 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-21 16:08:51,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:51,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:51,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:51,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:08:51,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:51,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:51,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1234942835, now seen corresponding path program 1 times [2024-06-21 16:08:51,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:51,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728572040] [2024-06-21 16:08:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:51,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:53,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:53,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728572040] [2024-06-21 16:08:53,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728572040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:53,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:53,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:08:53,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109643058] [2024-06-21 16:08:53,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:53,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:08:53,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:08:53,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:08:53,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 16:08:53,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:53,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:53,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 16:08:53,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:53,952 INFO L124 PetriNetUnfolderBase]: 1558/2398 cut-off events. [2024-06-21 16:08:53,952 INFO L125 PetriNetUnfolderBase]: For 1327/1327 co-relation queries the response was YES. [2024-06-21 16:08:53,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6014 conditions, 2398 events. 1558/2398 cut-off events. For 1327/1327 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12426 event pairs, 839 based on Foata normal form. 3/2382 useless extension candidates. Maximal degree in co-relation 6000. Up to 2286 conditions per place. [2024-06-21 16:08:53,966 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 47 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 16:08:53,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 324 flow [2024-06-21 16:08:53,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:08:53,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:08:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 16:08:53,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-21 16:08:53,968 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 130 transitions. [2024-06-21 16:08:53,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 324 flow [2024-06-21 16:08:53,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 16:08:53,972 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-21 16:08:53,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-21 16:08:53,972 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-21 16:08:53,973 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-21 16:08:53,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:53,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:53,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:53,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:08:53,974 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)] === [2024-06-21 16:08:53,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash -293456726, now seen corresponding path program 1 times [2024-06-21 16:08:53,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:53,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127330625] [2024-06-21 16:08:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:53,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:55,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:55,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127330625] [2024-06-21 16:08:55,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127330625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:55,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:55,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:08:55,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871374357] [2024-06-21 16:08:55,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:55,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:08:55,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:55,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:08:55,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:08:55,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 16:08:55,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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) [2024-06-21 16:08:55,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:55,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 16:08:55,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:56,145 INFO L124 PetriNetUnfolderBase]: 1552/2407 cut-off events. [2024-06-21 16:08:56,145 INFO L125 PetriNetUnfolderBase]: For 2479/2479 co-relation queries the response was YES. [2024-06-21 16:08:56,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6593 conditions, 2407 events. 1552/2407 cut-off events. For 2479/2479 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12601 event pairs, 697 based on Foata normal form. 3/2404 useless extension candidates. Maximal degree in co-relation 6578. Up to 2262 conditions per place. [2024-06-21 16:08:56,162 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 54 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-21 16:08:56,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 402 flow [2024-06-21 16:08:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:08:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:08:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 16:08:56,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 16:08:56,166 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 154 transitions. [2024-06-21 16:08:56,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 402 flow [2024-06-21 16:08:56,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 378 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:08:56,172 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 214 flow [2024-06-21 16:08:56,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-06-21 16:08:56,173 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-21 16:08:56,174 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 214 flow [2024-06-21 16:08:56,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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) [2024-06-21 16:08:56,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:56,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:56,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:08:56,175 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)] === [2024-06-21 16:08:56,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:56,176 INFO L85 PathProgramCache]: Analyzing trace with hash -568962572, now seen corresponding path program 1 times [2024-06-21 16:08:56,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:56,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856768365] [2024-06-21 16:08:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:56,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:56,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:56,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856768365] [2024-06-21 16:08:56,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856768365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:56,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:56,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:08:56,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485935446] [2024-06-21 16:08:56,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:56,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:08:56,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:56,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:08:56,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:08:56,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:08:56,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 214 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) [2024-06-21 16:08:56,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:56,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:08:56,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:57,554 INFO L124 PetriNetUnfolderBase]: 1836/2891 cut-off events. [2024-06-21 16:08:57,554 INFO L125 PetriNetUnfolderBase]: For 4376/4376 co-relation queries the response was YES. [2024-06-21 16:08:57,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8378 conditions, 2891 events. 1836/2891 cut-off events. For 4376/4376 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15166 event pairs, 950 based on Foata normal form. 2/2851 useless extension candidates. Maximal degree in co-relation 8361. Up to 2709 conditions per place. [2024-06-21 16:08:57,599 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 45 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-21 16:08:57,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 364 flow [2024-06-21 16:08:57,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:08:57,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:08:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-21 16:08:57,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-21 16:08:57,602 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 214 flow. Second operand 5 states and 107 transitions. [2024-06-21 16:08:57,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 364 flow [2024-06-21 16:08:57,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 330 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 16:08:57,610 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-21 16:08:57,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-21 16:08:57,612 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-21 16:08:57,613 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-21 16:08:57,614 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) [2024-06-21 16:08:57,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:57,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:57,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:08:57,615 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)] === [2024-06-21 16:08:57,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash -501762066, now seen corresponding path program 1 times [2024-06-21 16:08:57,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:57,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085265570] [2024-06-21 16:08:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:57,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:58,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:58,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085265570] [2024-06-21 16:08:58,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085265570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:58,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:58,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:08:58,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683290400] [2024-06-21 16:08:58,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:58,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:08:58,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:58,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:08:58,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:08:58,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:08:58,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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) [2024-06-21 16:08:58,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:58,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:08:58,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:59,360 INFO L124 PetriNetUnfolderBase]: 1819/2922 cut-off events. [2024-06-21 16:08:59,360 INFO L125 PetriNetUnfolderBase]: For 6017/6017 co-relation queries the response was YES. [2024-06-21 16:08:59,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8945 conditions, 2922 events. 1819/2922 cut-off events. For 6017/6017 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15586 event pairs, 914 based on Foata normal form. 4/2916 useless extension candidates. Maximal degree in co-relation 8926. Up to 2677 conditions per place. [2024-06-21 16:08:59,382 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 50 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-21 16:08:59,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 408 flow [2024-06-21 16:08:59,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:08:59,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:08:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 16:08:59,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810606060606061 [2024-06-21 16:08:59,384 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 6 states and 127 transitions. [2024-06-21 16:08:59,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 408 flow [2024-06-21 16:08:59,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 386 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 16:08:59,389 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 260 flow [2024-06-21 16:08:59,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-21 16:08:59,391 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-06-21 16:08:59,391 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 260 flow [2024-06-21 16:08:59,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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) [2024-06-21 16:08:59,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:59,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:59,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:08:59,392 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)] === [2024-06-21 16:08:59,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:59,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2716375, now seen corresponding path program 1 times [2024-06-21 16:08:59,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:59,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549788081] [2024-06-21 16:08:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:59,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:00,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:00,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549788081] [2024-06-21 16:09:00,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549788081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:00,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:00,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:09:00,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718135806] [2024-06-21 16:09:00,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:00,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:09:00,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:00,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:09:00,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:09:00,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:09:00,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 260 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) [2024-06-21 16:09:00,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:00,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:09:00,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:00,996 INFO L124 PetriNetUnfolderBase]: 2110/3221 cut-off events. [2024-06-21 16:09:00,996 INFO L125 PetriNetUnfolderBase]: For 9465/9471 co-relation queries the response was YES. [2024-06-21 16:09:01,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10820 conditions, 3221 events. 2110/3221 cut-off events. For 9465/9471 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16347 event pairs, 1074 based on Foata normal form. 6/3224 useless extension candidates. Maximal degree in co-relation 10800. Up to 3081 conditions per place. [2024-06-21 16:09:01,025 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 56 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-21 16:09:01,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 522 flow [2024-06-21 16:09:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:09:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:09:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 16:09:01,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-21 16:09:01,027 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 260 flow. Second operand 6 states and 128 transitions. [2024-06-21 16:09:01,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 522 flow [2024-06-21 16:09:01,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 490 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:09:01,033 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 318 flow [2024-06-21 16:09:01,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-06-21 16:09:01,034 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2024-06-21 16:09:01,035 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 318 flow [2024-06-21 16:09:01,035 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) [2024-06-21 16:09:01,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:01,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:01,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:09:01,035 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:01,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:01,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1417243637, now seen corresponding path program 1 times [2024-06-21 16:09:01,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:01,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909221627] [2024-06-21 16:09:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:01,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:03,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:03,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909221627] [2024-06-21 16:09:03,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909221627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:03,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:03,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:03,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395989827] [2024-06-21 16:09:03,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:03,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:03,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:03,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:03,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:03,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:09:03,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 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) [2024-06-21 16:09:03,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:03,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:09:03,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:03,997 INFO L124 PetriNetUnfolderBase]: 2092/3200 cut-off events. [2024-06-21 16:09:03,998 INFO L125 PetriNetUnfolderBase]: For 12578/12578 co-relation queries the response was YES. [2024-06-21 16:09:04,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11344 conditions, 3200 events. 2092/3200 cut-off events. For 12578/12578 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16314 event pairs, 688 based on Foata normal form. 6/3194 useless extension candidates. Maximal degree in co-relation 11324. Up to 2974 conditions per place. [2024-06-21 16:09:04,018 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 75 selfloop transitions, 18 changer transitions 0/103 dead transitions. [2024-06-21 16:09:04,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 103 transitions, 632 flow [2024-06-21 16:09:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 16:09:04,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426136363636364 [2024-06-21 16:09:04,021 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 318 flow. Second operand 8 states and 191 transitions. [2024-06-21 16:09:04,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 103 transitions, 632 flow [2024-06-21 16:09:04,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 103 transitions, 608 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 16:09:04,029 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 373 flow [2024-06-21 16:09:04,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=373, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-21 16:09:04,030 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-21 16:09:04,030 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 373 flow [2024-06-21 16:09:04,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 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) [2024-06-21 16:09:04,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:04,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:04,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:09:04,031 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)] === [2024-06-21 16:09:04,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:04,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1625236501, now seen corresponding path program 2 times [2024-06-21 16:09:04,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:04,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698068860] [2024-06-21 16:09:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:04,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:04,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:04,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698068860] [2024-06-21 16:09:04,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698068860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:04,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:04,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:09:04,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141760397] [2024-06-21 16:09:04,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:04,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:09:04,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:04,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:09:04,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:09:04,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:09:04,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 373 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) [2024-06-21 16:09:04,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:04,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:09:04,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:05,665 INFO L124 PetriNetUnfolderBase]: 2096/3204 cut-off events. [2024-06-21 16:09:05,665 INFO L125 PetriNetUnfolderBase]: For 15999/16014 co-relation queries the response was YES. [2024-06-21 16:09:05,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12174 conditions, 3204 events. 2096/3204 cut-off events. For 15999/16014 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16299 event pairs, 895 based on Foata normal form. 12/3212 useless extension candidates. Maximal degree in co-relation 12151. Up to 3061 conditions per place. [2024-06-21 16:09:05,684 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 55 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-21 16:09:05,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 553 flow [2024-06-21 16:09:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:09:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:09:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-21 16:09:05,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-21 16:09:05,686 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 373 flow. Second operand 6 states and 122 transitions. [2024-06-21 16:09:05,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 553 flow [2024-06-21 16:09:05,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 488 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:05,694 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 348 flow [2024-06-21 16:09:05,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=348, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-21 16:09:05,696 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-21 16:09:05,696 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 348 flow [2024-06-21 16:09:05,696 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) [2024-06-21 16:09:05,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:05,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:05,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:09:05,697 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)] === [2024-06-21 16:09:05,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:05,697 INFO L85 PathProgramCache]: Analyzing trace with hash 955716885, now seen corresponding path program 1 times [2024-06-21 16:09:05,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:05,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727507071] [2024-06-21 16:09:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:05,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:06,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:06,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727507071] [2024-06-21 16:09:06,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727507071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:06,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:06,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:06,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349207390] [2024-06-21 16:09:06,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:06,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:06,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:06,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:06,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:06,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 348 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) [2024-06-21 16:09:06,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:06,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:06,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:07,380 INFO L124 PetriNetUnfolderBase]: 2311/3475 cut-off events. [2024-06-21 16:09:07,380 INFO L125 PetriNetUnfolderBase]: For 19146/19156 co-relation queries the response was YES. [2024-06-21 16:09:07,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13417 conditions, 3475 events. 2311/3475 cut-off events. For 19146/19156 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17230 event pairs, 870 based on Foata normal form. 10/3482 useless extension candidates. Maximal degree in co-relation 13392. Up to 3259 conditions per place. [2024-06-21 16:09:07,400 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 78 selfloop transitions, 41 changer transitions 0/124 dead transitions. [2024-06-21 16:09:07,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 124 transitions, 995 flow [2024-06-21 16:09:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 16:09:07,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-21 16:09:07,402 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 348 flow. Second operand 8 states and 166 transitions. [2024-06-21 16:09:07,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 124 transitions, 995 flow [2024-06-21 16:09:07,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 124 transitions, 930 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:07,413 INFO L231 Difference]: Finished difference. Result has 73 places, 90 transitions, 638 flow [2024-06-21 16:09:07,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=638, PETRI_PLACES=73, PETRI_TRANSITIONS=90} [2024-06-21 16:09:07,414 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-21 16:09:07,415 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 90 transitions, 638 flow [2024-06-21 16:09:07,415 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) [2024-06-21 16:09:07,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:07,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:07,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:09:07,416 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)] === [2024-06-21 16:09:07,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash 84029139, now seen corresponding path program 2 times [2024-06-21 16:09:07,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:07,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079473532] [2024-06-21 16:09:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:07,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:08,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:08,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079473532] [2024-06-21 16:09:08,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079473532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:08,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:08,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:08,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443664475] [2024-06-21 16:09:08,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:08,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:08,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:08,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:08,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 90 transitions, 638 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) [2024-06-21 16:09:08,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:08,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:08,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:09,087 INFO L124 PetriNetUnfolderBase]: 2327/3497 cut-off events. [2024-06-21 16:09:09,088 INFO L125 PetriNetUnfolderBase]: For 23681/23695 co-relation queries the response was YES. [2024-06-21 16:09:09,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14528 conditions, 3497 events. 2327/3497 cut-off events. For 23681/23695 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17345 event pairs, 875 based on Foata normal form. 16/3510 useless extension candidates. Maximal degree in co-relation 14499. Up to 3277 conditions per place. [2024-06-21 16:09:09,110 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 70 selfloop transitions, 49 changer transitions 0/124 dead transitions. [2024-06-21 16:09:09,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 124 transitions, 1082 flow [2024-06-21 16:09:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 16:09:09,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 16:09:09,111 INFO L175 Difference]: Start difference. First operand has 73 places, 90 transitions, 638 flow. Second operand 7 states and 143 transitions. [2024-06-21 16:09:09,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 124 transitions, 1082 flow [2024-06-21 16:09:09,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 124 transitions, 1048 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 16:09:09,128 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 791 flow [2024-06-21 16:09:09,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=791, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2024-06-21 16:09:09,129 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-21 16:09:09,129 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 791 flow [2024-06-21 16:09:09,129 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) [2024-06-21 16:09:09,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:09,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:09,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:09:09,130 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)] === [2024-06-21 16:09:09,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:09,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1393450129, now seen corresponding path program 1 times [2024-06-21 16:09:09,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:09,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898577308] [2024-06-21 16:09:09,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:09,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:09,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:09,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898577308] [2024-06-21 16:09:09,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898577308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:09,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:09,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:09,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720782380] [2024-06-21 16:09:09,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:09,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:09,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:09,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:09,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:10,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:09:10,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 791 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) [2024-06-21 16:09:10,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:10,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:09:10,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:10,791 INFO L124 PetriNetUnfolderBase]: 2230/3415 cut-off events. [2024-06-21 16:09:10,791 INFO L125 PetriNetUnfolderBase]: For 27008/27022 co-relation queries the response was YES. [2024-06-21 16:09:10,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14614 conditions, 3415 events. 2230/3415 cut-off events. For 27008/27022 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17447 event pairs, 825 based on Foata normal form. 13/3425 useless extension candidates. Maximal degree in co-relation 14583. Up to 3128 conditions per place. [2024-06-21 16:09:10,811 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 86 selfloop transitions, 30 changer transitions 0/131 dead transitions. [2024-06-21 16:09:10,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 131 transitions, 1219 flow [2024-06-21 16:09:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 16:09:10,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-21 16:09:10,814 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 791 flow. Second operand 7 states and 150 transitions. [2024-06-21 16:09:10,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 131 transitions, 1219 flow [2024-06-21 16:09:10,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 131 transitions, 1091 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:10,839 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 802 flow [2024-06-21 16:09:10,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=802, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2024-06-21 16:09:10,840 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-21 16:09:10,841 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 802 flow [2024-06-21 16:09:10,841 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) [2024-06-21 16:09:10,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:10,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:10,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:09:10,842 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)] === [2024-06-21 16:09:10,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:10,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1393450377, now seen corresponding path program 3 times [2024-06-21 16:09:10,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:10,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024715023] [2024-06-21 16:09:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:10,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:11,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:11,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024715023] [2024-06-21 16:09:11,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024715023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:11,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:11,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:11,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623881737] [2024-06-21 16:09:11,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:11,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:11,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:11,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:11,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:11,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:11,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 802 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) [2024-06-21 16:09:11,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:11,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:11,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:12,616 INFO L124 PetriNetUnfolderBase]: 2372/3568 cut-off events. [2024-06-21 16:09:12,616 INFO L125 PetriNetUnfolderBase]: For 28646/28649 co-relation queries the response was YES. [2024-06-21 16:09:12,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15644 conditions, 3568 events. 2372/3568 cut-off events. For 28646/28649 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17704 event pairs, 855 based on Foata normal form. 7/3572 useless extension candidates. Maximal degree in co-relation 15613. Up to 3335 conditions per place. [2024-06-21 16:09:12,638 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 76 selfloop transitions, 55 changer transitions 0/136 dead transitions. [2024-06-21 16:09:12,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 136 transitions, 1296 flow [2024-06-21 16:09:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 16:09:12,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-21 16:09:12,639 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 802 flow. Second operand 7 states and 141 transitions. [2024-06-21 16:09:12,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 136 transitions, 1296 flow [2024-06-21 16:09:12,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 136 transitions, 1255 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 16:09:12,667 INFO L231 Difference]: Finished difference. Result has 84 places, 111 transitions, 994 flow [2024-06-21 16:09:12,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=994, PETRI_PLACES=84, PETRI_TRANSITIONS=111} [2024-06-21 16:09:12,668 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-06-21 16:09:12,668 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 111 transitions, 994 flow [2024-06-21 16:09:12,668 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) [2024-06-21 16:09:12,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:12,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:12,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:09:12,669 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)] === [2024-06-21 16:09:12,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:12,669 INFO L85 PathProgramCache]: Analyzing trace with hash -636814507, now seen corresponding path program 4 times [2024-06-21 16:09:12,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:12,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339352250] [2024-06-21 16:09:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:12,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:13,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:13,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339352250] [2024-06-21 16:09:13,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339352250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:13,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:13,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:13,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440757822] [2024-06-21 16:09:13,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:13,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:13,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:13,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:13,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:13,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:13,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 111 transitions, 994 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) [2024-06-21 16:09:13,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:13,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:13,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:14,382 INFO L124 PetriNetUnfolderBase]: 2361/3556 cut-off events. [2024-06-21 16:09:14,383 INFO L125 PetriNetUnfolderBase]: For 32451/32466 co-relation queries the response was YES. [2024-06-21 16:09:14,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16006 conditions, 3556 events. 2361/3556 cut-off events. For 32451/32466 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17657 event pairs, 859 based on Foata normal form. 14/3559 useless extension candidates. Maximal degree in co-relation 15973. Up to 3324 conditions per place. [2024-06-21 16:09:14,408 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 71 selfloop transitions, 55 changer transitions 0/131 dead transitions. [2024-06-21 16:09:14,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 131 transitions, 1314 flow [2024-06-21 16:09:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:14,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:14,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 16:09:14,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-21 16:09:14,410 INFO L175 Difference]: Start difference. First operand has 84 places, 111 transitions, 994 flow. Second operand 7 states and 136 transitions. [2024-06-21 16:09:14,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 131 transitions, 1314 flow [2024-06-21 16:09:14,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 1145 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-21 16:09:14,442 INFO L231 Difference]: Finished difference. Result has 87 places, 111 transitions, 950 flow [2024-06-21 16:09:14,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=950, PETRI_PLACES=87, PETRI_TRANSITIONS=111} [2024-06-21 16:09:14,443 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-21 16:09:14,443 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 111 transitions, 950 flow [2024-06-21 16:09:14,444 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) [2024-06-21 16:09:14,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:14,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:14,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:09:14,444 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)] === [2024-06-21 16:09:14,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:14,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1157274769, now seen corresponding path program 2 times [2024-06-21 16:09:14,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:14,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962864197] [2024-06-21 16:09:14,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:14,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:15,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:15,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962864197] [2024-06-21 16:09:15,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962864197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:15,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:15,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:15,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472849179] [2024-06-21 16:09:15,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:15,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:15,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:15,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:15,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:15,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:09:15,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 111 transitions, 950 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) [2024-06-21 16:09:15,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:15,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:09:15,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:16,137 INFO L124 PetriNetUnfolderBase]: 2261/3465 cut-off events. [2024-06-21 16:09:16,137 INFO L125 PetriNetUnfolderBase]: For 35741/35756 co-relation queries the response was YES. [2024-06-21 16:09:16,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15805 conditions, 3465 events. 2261/3465 cut-off events. For 35741/35756 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17663 event pairs, 816 based on Foata normal form. 14/3473 useless extension candidates. Maximal degree in co-relation 15771. Up to 3159 conditions per place. [2024-06-21 16:09:16,155 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 91 selfloop transitions, 33 changer transitions 0/142 dead transitions. [2024-06-21 16:09:16,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 142 transitions, 1378 flow [2024-06-21 16:09:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-21 16:09:16,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:09:16,157 INFO L175 Difference]: Start difference. First operand has 87 places, 111 transitions, 950 flow. Second operand 7 states and 147 transitions. [2024-06-21 16:09:16,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 142 transitions, 1378 flow [2024-06-21 16:09:16,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 142 transitions, 1209 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:09:16,184 INFO L231 Difference]: Finished difference. Result has 87 places, 114 transitions, 892 flow [2024-06-21 16:09:16,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=892, PETRI_PLACES=87, PETRI_TRANSITIONS=114} [2024-06-21 16:09:16,185 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-21 16:09:16,185 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 114 transitions, 892 flow [2024-06-21 16:09:16,185 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) [2024-06-21 16:09:16,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:16,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:16,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:09:16,186 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)] === [2024-06-21 16:09:16,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:16,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1156978099, now seen corresponding path program 3 times [2024-06-21 16:09:16,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:16,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477910832] [2024-06-21 16:09:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:16,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:17,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:17,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477910832] [2024-06-21 16:09:17,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477910832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:17,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:17,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:17,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251815631] [2024-06-21 16:09:17,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:17,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:17,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:17,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:17,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:09:17,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 892 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) [2024-06-21 16:09:17,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:17,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:09:17,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:17,858 INFO L124 PetriNetUnfolderBase]: 2253/3452 cut-off events. [2024-06-21 16:09:17,858 INFO L125 PetriNetUnfolderBase]: For 39129/39144 co-relation queries the response was YES. [2024-06-21 16:09:17,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15935 conditions, 3452 events. 2253/3452 cut-off events. For 39129/39144 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17590 event pairs, 816 based on Foata normal form. 14/3460 useless extension candidates. Maximal degree in co-relation 15900. Up to 3151 conditions per place. [2024-06-21 16:09:17,876 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 85 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2024-06-21 16:09:17,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 138 transitions, 1212 flow [2024-06-21 16:09:17,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:17,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 16:09:17,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 16:09:17,878 INFO L175 Difference]: Start difference. First operand has 87 places, 114 transitions, 892 flow. Second operand 7 states and 143 transitions. [2024-06-21 16:09:17,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 138 transitions, 1212 flow [2024-06-21 16:09:17,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 138 transitions, 1102 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:17,923 INFO L231 Difference]: Finished difference. Result has 89 places, 114 transitions, 860 flow [2024-06-21 16:09:17,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=89, PETRI_TRANSITIONS=114} [2024-06-21 16:09:17,924 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-21 16:09:17,924 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 114 transitions, 860 flow [2024-06-21 16:09:17,924 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) [2024-06-21 16:09:17,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:17,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:17,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:09:17,927 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:17,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:17,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1858660447, now seen corresponding path program 1 times [2024-06-21 16:09:17,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:17,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143100432] [2024-06-21 16:09:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:17,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:18,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:18,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143100432] [2024-06-21 16:09:18,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143100432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:18,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:18,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:09:18,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368641960] [2024-06-21 16:09:18,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:18,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:09:18,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:18,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:09:18,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:09:18,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 16:09:18,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 860 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:18,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:18,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 16:09:18,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:19,321 INFO L124 PetriNetUnfolderBase]: 1731/2905 cut-off events. [2024-06-21 16:09:19,321 INFO L125 PetriNetUnfolderBase]: For 37099/37099 co-relation queries the response was YES. [2024-06-21 16:09:19,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13525 conditions, 2905 events. 1731/2905 cut-off events. For 37099/37099 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16437 event pairs, 685 based on Foata normal form. 1/2896 useless extension candidates. Maximal degree in co-relation 13489. Up to 2524 conditions per place. [2024-06-21 16:09:19,338 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 81 selfloop transitions, 8 changer transitions 0/125 dead transitions. [2024-06-21 16:09:19,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 125 transitions, 1084 flow [2024-06-21 16:09:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:09:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:09:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-21 16:09:19,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:09:19,339 INFO L175 Difference]: Start difference. First operand has 89 places, 114 transitions, 860 flow. Second operand 5 states and 110 transitions. [2024-06-21 16:09:19,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 125 transitions, 1084 flow [2024-06-21 16:09:19,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 1001 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:09:19,371 INFO L231 Difference]: Finished difference. Result has 88 places, 117 transitions, 827 flow [2024-06-21 16:09:19,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=827, PETRI_PLACES=88, PETRI_TRANSITIONS=117} [2024-06-21 16:09:19,372 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-21 16:09:19,372 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 117 transitions, 827 flow [2024-06-21 16:09:19,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:19,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:19,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:19,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:09:19,373 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)] === [2024-06-21 16:09:19,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1690212682, now seen corresponding path program 1 times [2024-06-21 16:09:19,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:19,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601876245] [2024-06-21 16:09:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:19,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:20,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:20,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601876245] [2024-06-21 16:09:20,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601876245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:20,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:20,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:20,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321531732] [2024-06-21 16:09:20,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:20,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:20,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:20,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:20,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:20,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 117 transitions, 827 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) [2024-06-21 16:09:20,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:20,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:20,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:21,322 INFO L124 PetriNetUnfolderBase]: 2381/3585 cut-off events. [2024-06-21 16:09:21,322 INFO L125 PetriNetUnfolderBase]: For 47069/47076 co-relation queries the response was YES. [2024-06-21 16:09:21,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17270 conditions, 3585 events. 2381/3585 cut-off events. For 47069/47076 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17860 event pairs, 838 based on Foata normal form. 8/3590 useless extension candidates. Maximal degree in co-relation 17233. Up to 3273 conditions per place. [2024-06-21 16:09:21,340 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 87 selfloop transitions, 65 changer transitions 0/157 dead transitions. [2024-06-21 16:09:21,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 157 transitions, 1369 flow [2024-06-21 16:09:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 16:09:21,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 16:09:21,342 INFO L175 Difference]: Start difference. First operand has 88 places, 117 transitions, 827 flow. Second operand 8 states and 164 transitions. [2024-06-21 16:09:21,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 157 transitions, 1369 flow [2024-06-21 16:09:21,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 157 transitions, 1341 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 16:09:21,367 INFO L231 Difference]: Finished difference. Result has 93 places, 123 transitions, 1011 flow [2024-06-21 16:09:21,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1011, PETRI_PLACES=93, PETRI_TRANSITIONS=123} [2024-06-21 16:09:21,368 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2024-06-21 16:09:21,368 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 123 transitions, 1011 flow [2024-06-21 16:09:21,368 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) [2024-06-21 16:09:21,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:21,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:21,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:09:21,369 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)] === [2024-06-21 16:09:21,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1690062735, now seen corresponding path program 1 times [2024-06-21 16:09:21,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:21,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261518101] [2024-06-21 16:09:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:21,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:22,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:22,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261518101] [2024-06-21 16:09:22,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261518101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:22,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:22,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:22,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623900594] [2024-06-21 16:09:22,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:22,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:22,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:22,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:22,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:22,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:22,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 123 transitions, 1011 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) [2024-06-21 16:09:22,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:22,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:22,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:23,186 INFO L124 PetriNetUnfolderBase]: 2403/3616 cut-off events. [2024-06-21 16:09:23,187 INFO L125 PetriNetUnfolderBase]: For 54101/54108 co-relation queries the response was YES. [2024-06-21 16:09:23,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18312 conditions, 3616 events. 2403/3616 cut-off events. For 54101/54108 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17954 event pairs, 761 based on Foata normal form. 8/3621 useless extension candidates. Maximal degree in co-relation 18274. Up to 3200 conditions per place. [2024-06-21 16:09:23,216 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 95 selfloop transitions, 65 changer transitions 0/165 dead transitions. [2024-06-21 16:09:23,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 165 transitions, 1581 flow [2024-06-21 16:09:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 16:09:23,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-21 16:09:23,218 INFO L175 Difference]: Start difference. First operand has 93 places, 123 transitions, 1011 flow. Second operand 8 states and 167 transitions. [2024-06-21 16:09:23,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 165 transitions, 1581 flow [2024-06-21 16:09:23,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 165 transitions, 1476 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 16:09:23,273 INFO L231 Difference]: Finished difference. Result has 97 places, 129 transitions, 1124 flow [2024-06-21 16:09:23,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1124, PETRI_PLACES=97, PETRI_TRANSITIONS=129} [2024-06-21 16:09:23,274 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-21 16:09:23,274 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 129 transitions, 1124 flow [2024-06-21 16:09:23,275 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) [2024-06-21 16:09:23,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:23,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:23,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:09:23,275 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)] === [2024-06-21 16:09:23,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:23,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1482831938, now seen corresponding path program 2 times [2024-06-21 16:09:23,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:23,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818974542] [2024-06-21 16:09:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:23,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:24,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:24,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818974542] [2024-06-21 16:09:24,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818974542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:24,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:24,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:24,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854843163] [2024-06-21 16:09:24,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:24,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:24,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:24,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:24,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:24,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:24,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 129 transitions, 1124 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) [2024-06-21 16:09:24,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:24,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:24,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:25,133 INFO L124 PetriNetUnfolderBase]: 2414/3632 cut-off events. [2024-06-21 16:09:25,133 INFO L125 PetriNetUnfolderBase]: For 60193/60200 co-relation queries the response was YES. [2024-06-21 16:09:25,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19114 conditions, 3632 events. 2414/3632 cut-off events. For 60193/60200 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18112 event pairs, 817 based on Foata normal form. 8/3637 useless extension candidates. Maximal degree in co-relation 19074. Up to 3317 conditions per place. [2024-06-21 16:09:25,152 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 99 selfloop transitions, 61 changer transitions 0/165 dead transitions. [2024-06-21 16:09:25,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 165 transitions, 1652 flow [2024-06-21 16:09:25,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:09:25,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-21 16:09:25,154 INFO L175 Difference]: Start difference. First operand has 97 places, 129 transitions, 1124 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:09:25,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 165 transitions, 1652 flow [2024-06-21 16:09:25,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 165 transitions, 1571 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:09:25,185 INFO L231 Difference]: Finished difference. Result has 101 places, 132 transitions, 1205 flow [2024-06-21 16:09:25,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1205, PETRI_PLACES=101, PETRI_TRANSITIONS=132} [2024-06-21 16:09:25,185 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-21 16:09:25,185 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 132 transitions, 1205 flow [2024-06-21 16:09:25,186 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) [2024-06-21 16:09:25,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:25,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:25,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:09:25,186 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)] === [2024-06-21 16:09:25,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:25,187 INFO L85 PathProgramCache]: Analyzing trace with hash -247280035, now seen corresponding path program 2 times [2024-06-21 16:09:25,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:25,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241388216] [2024-06-21 16:09:25,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:25,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:26,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:26,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241388216] [2024-06-21 16:09:26,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241388216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:26,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:26,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:26,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253043512] [2024-06-21 16:09:26,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:26,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:26,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:26,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:26,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:26,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:26,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 132 transitions, 1205 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) [2024-06-21 16:09:26,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:26,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:26,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:27,056 INFO L124 PetriNetUnfolderBase]: 2468/3715 cut-off events. [2024-06-21 16:09:27,056 INFO L125 PetriNetUnfolderBase]: For 67426/67429 co-relation queries the response was YES. [2024-06-21 16:09:27,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19980 conditions, 3715 events. 2468/3715 cut-off events. For 67426/67429 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18513 event pairs, 770 based on Foata normal form. 4/3716 useless extension candidates. Maximal degree in co-relation 19938. Up to 3262 conditions per place. [2024-06-21 16:09:27,078 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 98 selfloop transitions, 69 changer transitions 0/172 dead transitions. [2024-06-21 16:09:27,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 172 transitions, 1857 flow [2024-06-21 16:09:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:27,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 16:09:27,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-21 16:09:27,079 INFO L175 Difference]: Start difference. First operand has 101 places, 132 transitions, 1205 flow. Second operand 8 states and 167 transitions. [2024-06-21 16:09:27,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 172 transitions, 1857 flow [2024-06-21 16:09:27,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 172 transitions, 1752 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:27,125 INFO L231 Difference]: Finished difference. Result has 104 places, 138 transitions, 1318 flow [2024-06-21 16:09:27,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1318, PETRI_PLACES=104, PETRI_TRANSITIONS=138} [2024-06-21 16:09:27,126 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-21 16:09:27,126 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 138 transitions, 1318 flow [2024-06-21 16:09:27,126 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) [2024-06-21 16:09:27,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:27,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:27,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:09:27,127 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)] === [2024-06-21 16:09:27,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1828416005, now seen corresponding path program 3 times [2024-06-21 16:09:27,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:27,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883211414] [2024-06-21 16:09:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:27,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:28,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:28,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883211414] [2024-06-21 16:09:28,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883211414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:28,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:28,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:28,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566564326] [2024-06-21 16:09:28,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:28,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:28,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:28,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:28,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:28,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:28,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 138 transitions, 1318 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) [2024-06-21 16:09:28,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:28,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:28,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:29,003 INFO L124 PetriNetUnfolderBase]: 2458/3701 cut-off events. [2024-06-21 16:09:29,004 INFO L125 PetriNetUnfolderBase]: For 73116/73119 co-relation queries the response was YES. [2024-06-21 16:09:29,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20274 conditions, 3701 events. 2458/3701 cut-off events. For 73116/73119 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18494 event pairs, 768 based on Foata normal form. 4/3702 useless extension candidates. Maximal degree in co-relation 20231. Up to 3254 conditions per place. [2024-06-21 16:09:29,023 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 101 selfloop transitions, 66 changer transitions 0/172 dead transitions. [2024-06-21 16:09:29,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 172 transitions, 1832 flow [2024-06-21 16:09:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 16:09:29,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-21 16:09:29,025 INFO L175 Difference]: Start difference. First operand has 104 places, 138 transitions, 1318 flow. Second operand 8 states and 167 transitions. [2024-06-21 16:09:29,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 172 transitions, 1832 flow [2024-06-21 16:09:29,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 172 transitions, 1696 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 16:09:29,078 INFO L231 Difference]: Finished difference. Result has 108 places, 138 transitions, 1324 flow [2024-06-21 16:09:29,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1324, PETRI_PLACES=108, PETRI_TRANSITIONS=138} [2024-06-21 16:09:29,078 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-21 16:09:29,079 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 138 transitions, 1324 flow [2024-06-21 16:09:29,079 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) [2024-06-21 16:09:29,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:29,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:29,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:09:29,079 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)] === [2024-06-21 16:09:29,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:29,079 INFO L85 PathProgramCache]: Analyzing trace with hash -247287692, now seen corresponding path program 3 times [2024-06-21 16:09:29,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:29,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077801569] [2024-06-21 16:09:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:29,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:29,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:29,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077801569] [2024-06-21 16:09:29,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077801569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:29,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:29,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:29,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927886247] [2024-06-21 16:09:29,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:29,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:29,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:29,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:29,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:30,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:30,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 138 transitions, 1324 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) [2024-06-21 16:09:30,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:30,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:30,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:30,931 INFO L124 PetriNetUnfolderBase]: 2469/3717 cut-off events. [2024-06-21 16:09:30,931 INFO L125 PetriNetUnfolderBase]: For 79110/79113 co-relation queries the response was YES. [2024-06-21 16:09:30,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20606 conditions, 3717 events. 2469/3717 cut-off events. For 79110/79113 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18536 event pairs, 824 based on Foata normal form. 4/3718 useless extension candidates. Maximal degree in co-relation 20562. Up to 3393 conditions per place. [2024-06-21 16:09:30,954 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 105 selfloop transitions, 61 changer transitions 0/171 dead transitions. [2024-06-21 16:09:30,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 171 transitions, 1867 flow [2024-06-21 16:09:30,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:09:30,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:09:30,955 INFO L175 Difference]: Start difference. First operand has 108 places, 138 transitions, 1324 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:09:30,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 171 transitions, 1867 flow [2024-06-21 16:09:31,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 171 transitions, 1724 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:09:31,004 INFO L231 Difference]: Finished difference. Result has 109 places, 141 transitions, 1346 flow [2024-06-21 16:09:31,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1346, PETRI_PLACES=109, PETRI_TRANSITIONS=141} [2024-06-21 16:09:31,005 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2024-06-21 16:09:31,005 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 141 transitions, 1346 flow [2024-06-21 16:09:31,005 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) [2024-06-21 16:09:31,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:31,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:31,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:09:31,005 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)] === [2024-06-21 16:09:31,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:31,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1733595455, now seen corresponding path program 4 times [2024-06-21 16:09:31,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:31,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699958817] [2024-06-21 16:09:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:31,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:31,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:31,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699958817] [2024-06-21 16:09:31,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699958817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:31,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:31,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:31,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417027272] [2024-06-21 16:09:31,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:31,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:31,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:31,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:31,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:32,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:32,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 141 transitions, 1346 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) [2024-06-21 16:09:32,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:32,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:32,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:32,953 INFO L124 PetriNetUnfolderBase]: 2523/3798 cut-off events. [2024-06-21 16:09:32,953 INFO L125 PetriNetUnfolderBase]: For 87542/87554 co-relation queries the response was YES. [2024-06-21 16:09:32,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21285 conditions, 3798 events. 2523/3798 cut-off events. For 87542/87554 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18970 event pairs, 766 based on Foata normal form. 12/3799 useless extension candidates. Maximal degree in co-relation 21240. Up to 3316 conditions per place. [2024-06-21 16:09:32,977 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 103 selfloop transitions, 72 changer transitions 0/180 dead transitions. [2024-06-21 16:09:32,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 180 transitions, 2044 flow [2024-06-21 16:09:32,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:32,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 16:09:32,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 16:09:32,978 INFO L175 Difference]: Start difference. First operand has 109 places, 141 transitions, 1346 flow. Second operand 8 states and 165 transitions. [2024-06-21 16:09:32,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 180 transitions, 2044 flow [2024-06-21 16:09:33,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 180 transitions, 1936 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:33,041 INFO L231 Difference]: Finished difference. Result has 112 places, 147 transitions, 1468 flow [2024-06-21 16:09:33,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1468, PETRI_PLACES=112, PETRI_TRANSITIONS=147} [2024-06-21 16:09:33,041 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-21 16:09:33,041 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 147 transitions, 1468 flow [2024-06-21 16:09:33,042 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) [2024-06-21 16:09:33,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:33,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:33,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:09:33,042 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)] === [2024-06-21 16:09:33,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:33,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1748738685, now seen corresponding path program 5 times [2024-06-21 16:09:33,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:33,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735351089] [2024-06-21 16:09:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:33,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:33,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:33,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735351089] [2024-06-21 16:09:33,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735351089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:33,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:33,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:33,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141885250] [2024-06-21 16:09:33,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:33,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:33,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:33,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:33,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:34,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:34,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 147 transitions, 1468 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) [2024-06-21 16:09:34,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:34,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:34,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:34,889 INFO L124 PetriNetUnfolderBase]: 2513/3784 cut-off events. [2024-06-21 16:09:34,889 INFO L125 PetriNetUnfolderBase]: For 94185/94197 co-relation queries the response was YES. [2024-06-21 16:09:34,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21564 conditions, 3784 events. 2513/3784 cut-off events. For 94185/94197 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18893 event pairs, 771 based on Foata normal form. 12/3785 useless extension candidates. Maximal degree in co-relation 21518. Up to 3308 conditions per place. [2024-06-21 16:09:34,913 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 91 selfloop transitions, 80 changer transitions 0/176 dead transitions. [2024-06-21 16:09:34,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 176 transitions, 1986 flow [2024-06-21 16:09:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:34,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:09:34,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:09:34,914 INFO L175 Difference]: Start difference. First operand has 112 places, 147 transitions, 1468 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:09:34,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 176 transitions, 1986 flow [2024-06-21 16:09:34,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 176 transitions, 1794 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:34,981 INFO L231 Difference]: Finished difference. Result has 115 places, 147 transitions, 1444 flow [2024-06-21 16:09:34,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1444, PETRI_PLACES=115, PETRI_TRANSITIONS=147} [2024-06-21 16:09:34,981 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-21 16:09:34,982 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 147 transitions, 1444 flow [2024-06-21 16:09:34,982 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) [2024-06-21 16:09:34,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:34,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:34,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:09:34,982 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)] === [2024-06-21 16:09:34,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:34,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1515786124, now seen corresponding path program 4 times [2024-06-21 16:09:34,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:34,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084559260] [2024-06-21 16:09:34,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:34,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:35,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:35,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084559260] [2024-06-21 16:09:35,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084559260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:35,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:35,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:35,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11777597] [2024-06-21 16:09:35,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:35,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:35,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:35,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:35,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:35,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:35,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 147 transitions, 1444 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) [2024-06-21 16:09:35,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:35,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:35,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:36,750 INFO L124 PetriNetUnfolderBase]: 2508/3784 cut-off events. [2024-06-21 16:09:36,750 INFO L125 PetriNetUnfolderBase]: For 99495/99498 co-relation queries the response was YES. [2024-06-21 16:09:36,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21750 conditions, 3784 events. 2508/3784 cut-off events. For 99495/99498 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18943 event pairs, 840 based on Foata normal form. 4/3775 useless extension candidates. Maximal degree in co-relation 21703. Up to 3452 conditions per place. [2024-06-21 16:09:36,774 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 105 selfloop transitions, 61 changer transitions 0/171 dead transitions. [2024-06-21 16:09:36,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 171 transitions, 1856 flow [2024-06-21 16:09:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:09:36,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-21 16:09:36,775 INFO L175 Difference]: Start difference. First operand has 115 places, 147 transitions, 1444 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:09:36,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 171 transitions, 1856 flow [2024-06-21 16:09:36,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 171 transitions, 1660 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:09:36,853 INFO L231 Difference]: Finished difference. Result has 116 places, 147 transitions, 1380 flow [2024-06-21 16:09:36,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1380, PETRI_PLACES=116, PETRI_TRANSITIONS=147} [2024-06-21 16:09:36,853 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 71 predicate places. [2024-06-21 16:09:36,854 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 147 transitions, 1380 flow [2024-06-21 16:09:36,854 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) [2024-06-21 16:09:36,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:36,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:36,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:09:36,854 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)] === [2024-06-21 16:09:36,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1739534475, now seen corresponding path program 6 times [2024-06-21 16:09:36,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:36,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785245101] [2024-06-21 16:09:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:36,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:37,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:37,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785245101] [2024-06-21 16:09:37,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785245101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:37,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:37,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:37,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105630863] [2024-06-21 16:09:37,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:37,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:37,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:37,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:37,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:37,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:37,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 147 transitions, 1380 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) [2024-06-21 16:09:37,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:37,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:37,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:38,635 INFO L124 PetriNetUnfolderBase]: 2498/3763 cut-off events. [2024-06-21 16:09:38,635 INFO L125 PetriNetUnfolderBase]: For 105640/105649 co-relation queries the response was YES. [2024-06-21 16:09:38,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21717 conditions, 3763 events. 2498/3763 cut-off events. For 105640/105649 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18754 event pairs, 762 based on Foata normal form. 10/3762 useless extension candidates. Maximal degree in co-relation 21669. Up to 3293 conditions per place. [2024-06-21 16:09:38,659 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 99 selfloop transitions, 73 changer transitions 0/177 dead transitions. [2024-06-21 16:09:38,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 177 transitions, 1820 flow [2024-06-21 16:09:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:09:38,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:09:38,660 INFO L175 Difference]: Start difference. First operand has 116 places, 147 transitions, 1380 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:09:38,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 177 transitions, 1820 flow [2024-06-21 16:09:38,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 177 transitions, 1594 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-21 16:09:38,735 INFO L231 Difference]: Finished difference. Result has 114 places, 147 transitions, 1310 flow [2024-06-21 16:09:38,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1310, PETRI_PLACES=114, PETRI_TRANSITIONS=147} [2024-06-21 16:09:38,735 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-21 16:09:38,735 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 147 transitions, 1310 flow [2024-06-21 16:09:38,735 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) [2024-06-21 16:09:38,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:38,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:38,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:09:38,736 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)] === [2024-06-21 16:09:38,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:38,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1749077298, now seen corresponding path program 1 times [2024-06-21 16:09:38,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:38,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769043583] [2024-06-21 16:09:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:38,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:40,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:40,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769043583] [2024-06-21 16:09:40,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769043583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:40,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:40,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:09:40,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631714236] [2024-06-21 16:09:40,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:40,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:09:40,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:40,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:09:40,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:09:40,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:09:40,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 147 transitions, 1310 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:40,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:40,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:09:40,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:41,007 INFO L124 PetriNetUnfolderBase]: 2071/3308 cut-off events. [2024-06-21 16:09:41,007 INFO L125 PetriNetUnfolderBase]: For 95352/95352 co-relation queries the response was YES. [2024-06-21 16:09:41,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18760 conditions, 3308 events. 2071/3308 cut-off events. For 95352/95352 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17668 event pairs, 669 based on Foata normal form. 4/3310 useless extension candidates. Maximal degree in co-relation 18712. Up to 2960 conditions per place. [2024-06-21 16:09:41,028 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 135 selfloop transitions, 16 changer transitions 0/176 dead transitions. [2024-06-21 16:09:41,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 176 transitions, 1738 flow [2024-06-21 16:09:41,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:41,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 16:09:41,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-21 16:09:41,029 INFO L175 Difference]: Start difference. First operand has 114 places, 147 transitions, 1310 flow. Second operand 8 states and 163 transitions. [2024-06-21 16:09:41,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 176 transitions, 1738 flow [2024-06-21 16:09:41,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 176 transitions, 1539 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:09:41,108 INFO L231 Difference]: Finished difference. Result has 115 places, 152 transitions, 1214 flow [2024-06-21 16:09:41,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1214, PETRI_PLACES=115, PETRI_TRANSITIONS=152} [2024-06-21 16:09:41,108 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-21 16:09:41,108 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 152 transitions, 1214 flow [2024-06-21 16:09:41,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:41,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:41,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:41,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:09:41,109 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:41,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:41,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1783897120, now seen corresponding path program 1 times [2024-06-21 16:09:41,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:41,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119527226] [2024-06-21 16:09:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:41,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:42,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:42,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119527226] [2024-06-21 16:09:42,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119527226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:42,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:42,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:09:42,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484113997] [2024-06-21 16:09:42,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:42,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:09:42,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:42,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:09:42,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:09:42,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 16:09:42,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 152 transitions, 1214 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-21 16:09:42,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:42,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 16:09:42,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:42,814 INFO L124 PetriNetUnfolderBase]: 1832/3072 cut-off events. [2024-06-21 16:09:42,814 INFO L125 PetriNetUnfolderBase]: For 98274/98274 co-relation queries the response was YES. [2024-06-21 16:09:42,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17851 conditions, 3072 events. 1832/3072 cut-off events. For 98274/98274 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17322 event pairs, 641 based on Foata normal form. 2/3072 useless extension candidates. Maximal degree in co-relation 17801. Up to 2582 conditions per place. [2024-06-21 16:09:42,834 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 104 selfloop transitions, 11 changer transitions 0/165 dead transitions. [2024-06-21 16:09:42,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 165 transitions, 1500 flow [2024-06-21 16:09:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:09:42,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:09:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-21 16:09:42,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-21 16:09:42,835 INFO L175 Difference]: Start difference. First operand has 115 places, 152 transitions, 1214 flow. Second operand 6 states and 129 transitions. [2024-06-21 16:09:42,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 165 transitions, 1500 flow [2024-06-21 16:09:42,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 165 transitions, 1441 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:42,905 INFO L231 Difference]: Finished difference. Result has 116 places, 155 transitions, 1217 flow [2024-06-21 16:09:42,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1217, PETRI_PLACES=116, PETRI_TRANSITIONS=155} [2024-06-21 16:09:42,906 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 71 predicate places. [2024-06-21 16:09:42,906 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 155 transitions, 1217 flow [2024-06-21 16:09:42,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-21 16:09:42,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:42,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:42,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:09:42,907 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:42,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash -569192296, now seen corresponding path program 1 times [2024-06-21 16:09:42,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:42,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247715105] [2024-06-21 16:09:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:42,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:44,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:44,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247715105] [2024-06-21 16:09:44,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247715105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:44,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:44,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:44,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397488679] [2024-06-21 16:09:44,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:44,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:44,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:44,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:44,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:44,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:44,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 155 transitions, 1217 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) [2024-06-21 16:09:44,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:44,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:44,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:45,053 INFO L124 PetriNetUnfolderBase]: 2492/3757 cut-off events. [2024-06-21 16:09:45,053 INFO L125 PetriNetUnfolderBase]: For 122878/122882 co-relation queries the response was YES. [2024-06-21 16:09:45,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22648 conditions, 3757 events. 2492/3757 cut-off events. For 122878/122882 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18748 event pairs, 762 based on Foata normal form. 6/3761 useless extension candidates. Maximal degree in co-relation 22597. Up to 3567 conditions per place. [2024-06-21 16:09:45,076 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 166 selfloop transitions, 27 changer transitions 0/198 dead transitions. [2024-06-21 16:09:45,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 198 transitions, 1777 flow [2024-06-21 16:09:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 16:09:45,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-21 16:09:45,078 INFO L175 Difference]: Start difference. First operand has 116 places, 155 transitions, 1217 flow. Second operand 9 states and 178 transitions. [2024-06-21 16:09:45,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 198 transitions, 1777 flow [2024-06-21 16:09:45,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 198 transitions, 1737 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 16:09:45,157 INFO L231 Difference]: Finished difference. Result has 121 places, 158 transitions, 1287 flow [2024-06-21 16:09:45,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1287, PETRI_PLACES=121, PETRI_TRANSITIONS=158} [2024-06-21 16:09:45,157 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-21 16:09:45,157 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 158 transitions, 1287 flow [2024-06-21 16:09:45,158 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) [2024-06-21 16:09:45,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:45,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:45,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:09:45,158 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)] === [2024-06-21 16:09:45,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash 669184312, now seen corresponding path program 1 times [2024-06-21 16:09:45,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:45,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379904887] [2024-06-21 16:09:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:45,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:46,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:46,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379904887] [2024-06-21 16:09:46,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379904887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:46,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:46,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:46,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648293080] [2024-06-21 16:09:46,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:46,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:46,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:46,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:46,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:46,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 158 transitions, 1287 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) [2024-06-21 16:09:46,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:46,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:46,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:47,309 INFO L124 PetriNetUnfolderBase]: 2514/3794 cut-off events. [2024-06-21 16:09:47,310 INFO L125 PetriNetUnfolderBase]: For 132835/132842 co-relation queries the response was YES. [2024-06-21 16:09:47,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23502 conditions, 3794 events. 2514/3794 cut-off events. For 132835/132842 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19125 event pairs, 687 based on Foata normal form. 8/3799 useless extension candidates. Maximal degree in co-relation 23450. Up to 3118 conditions per place. [2024-06-21 16:09:47,335 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 109 selfloop transitions, 92 changer transitions 0/206 dead transitions. [2024-06-21 16:09:47,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 206 transitions, 2021 flow [2024-06-21 16:09:47,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 16:09:47,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-21 16:09:47,337 INFO L175 Difference]: Start difference. First operand has 121 places, 158 transitions, 1287 flow. Second operand 9 states and 190 transitions. [2024-06-21 16:09:47,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 206 transitions, 2021 flow [2024-06-21 16:09:47,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 206 transitions, 1935 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 16:09:47,439 INFO L231 Difference]: Finished difference. Result has 123 places, 164 transitions, 1483 flow [2024-06-21 16:09:47,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1483, PETRI_PLACES=123, PETRI_TRANSITIONS=164} [2024-06-21 16:09:47,440 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 78 predicate places. [2024-06-21 16:09:47,440 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 164 transitions, 1483 flow [2024-06-21 16:09:47,440 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) [2024-06-21 16:09:47,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:47,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:47,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:09:47,440 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)] === [2024-06-21 16:09:47,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:47,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1277022092, now seen corresponding path program 2 times [2024-06-21 16:09:47,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:47,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069535230] [2024-06-21 16:09:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:47,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:48,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:48,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069535230] [2024-06-21 16:09:48,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069535230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:48,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:48,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:48,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846632196] [2024-06-21 16:09:48,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:48,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:48,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:48,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:48,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 164 transitions, 1483 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) [2024-06-21 16:09:48,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:48,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:48,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:49,542 INFO L124 PetriNetUnfolderBase]: 2525/3807 cut-off events. [2024-06-21 16:09:49,542 INFO L125 PetriNetUnfolderBase]: For 142437/142444 co-relation queries the response was YES. [2024-06-21 16:09:49,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24501 conditions, 3807 events. 2525/3807 cut-off events. For 142437/142444 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19110 event pairs, 750 based on Foata normal form. 8/3812 useless extension candidates. Maximal degree in co-relation 24448. Up to 3424 conditions per place. [2024-06-21 16:09:49,625 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 124 selfloop transitions, 79 changer transitions 0/208 dead transitions. [2024-06-21 16:09:49,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 208 transitions, 2225 flow [2024-06-21 16:09:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 16:09:49,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-21 16:09:49,626 INFO L175 Difference]: Start difference. First operand has 123 places, 164 transitions, 1483 flow. Second operand 9 states and 183 transitions. [2024-06-21 16:09:49,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 208 transitions, 2225 flow [2024-06-21 16:09:49,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 208 transitions, 2085 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:49,731 INFO L231 Difference]: Finished difference. Result has 127 places, 170 transitions, 1615 flow [2024-06-21 16:09:49,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1615, PETRI_PLACES=127, PETRI_TRANSITIONS=170} [2024-06-21 16:09:49,732 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-21 16:09:49,732 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 170 transitions, 1615 flow [2024-06-21 16:09:49,732 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) [2024-06-21 16:09:49,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:49,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:49,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:09:49,733 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)] === [2024-06-21 16:09:49,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:49,733 INFO L85 PathProgramCache]: Analyzing trace with hash 751534012, now seen corresponding path program 2 times [2024-06-21 16:09:49,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:49,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252925649] [2024-06-21 16:09:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:49,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:50,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:50,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252925649] [2024-06-21 16:09:50,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252925649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:50,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:50,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:50,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522658613] [2024-06-21 16:09:50,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:50,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:50,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:50,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:50,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:50,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:50,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 170 transitions, 1615 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) [2024-06-21 16:09:50,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:50,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:50,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:51,865 INFO L124 PetriNetUnfolderBase]: 2579/3894 cut-off events. [2024-06-21 16:09:51,866 INFO L125 PetriNetUnfolderBase]: For 156039/156046 co-relation queries the response was YES. [2024-06-21 16:09:51,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25729 conditions, 3894 events. 2579/3894 cut-off events. For 156039/156046 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19643 event pairs, 685 based on Foata normal form. 8/3899 useless extension candidates. Maximal degree in co-relation 25674. Up to 3180 conditions per place. [2024-06-21 16:09:51,897 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 127 selfloop transitions, 87 changer transitions 0/219 dead transitions. [2024-06-21 16:09:51,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 219 transitions, 2495 flow [2024-06-21 16:09:51,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 16:09:51,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-21 16:09:51,898 INFO L175 Difference]: Start difference. First operand has 127 places, 170 transitions, 1615 flow. Second operand 9 states and 190 transitions. [2024-06-21 16:09:51,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 219 transitions, 2495 flow [2024-06-21 16:09:52,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 219 transitions, 2366 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:52,055 INFO L231 Difference]: Finished difference. Result has 131 places, 176 transitions, 1740 flow [2024-06-21 16:09:52,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1740, PETRI_PLACES=131, PETRI_TRANSITIONS=176} [2024-06-21 16:09:52,055 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-21 16:09:52,055 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 176 transitions, 1740 flow [2024-06-21 16:09:52,056 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) [2024-06-21 16:09:52,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:52,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:52,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:09:52,056 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)] === [2024-06-21 16:09:52,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:52,057 INFO L85 PathProgramCache]: Analyzing trace with hash 751527502, now seen corresponding path program 3 times [2024-06-21 16:09:52,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:52,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5083134] [2024-06-21 16:09:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:52,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:53,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:53,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5083134] [2024-06-21 16:09:53,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5083134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:53,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:53,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:53,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395105237] [2024-06-21 16:09:53,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:53,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:53,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:53,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:53,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:53,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:53,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 176 transitions, 1740 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) [2024-06-21 16:09:53,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:53,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:53,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:54,181 INFO L124 PetriNetUnfolderBase]: 2569/3880 cut-off events. [2024-06-21 16:09:54,181 INFO L125 PetriNetUnfolderBase]: For 163327/163334 co-relation queries the response was YES. [2024-06-21 16:09:54,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26106 conditions, 3880 events. 2569/3880 cut-off events. For 163327/163334 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19602 event pairs, 685 based on Foata normal form. 8/3885 useless extension candidates. Maximal degree in co-relation 26049. Up to 3172 conditions per place. [2024-06-21 16:09:54,210 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 127 selfloop transitions, 86 changer transitions 0/218 dead transitions. [2024-06-21 16:09:54,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 218 transitions, 2430 flow [2024-06-21 16:09:54,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 16:09:54,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-21 16:09:54,212 INFO L175 Difference]: Start difference. First operand has 131 places, 176 transitions, 1740 flow. Second operand 9 states and 190 transitions. [2024-06-21 16:09:54,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 218 transitions, 2430 flow [2024-06-21 16:09:54,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 218 transitions, 2266 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:54,334 INFO L231 Difference]: Finished difference. Result has 135 places, 176 transitions, 1756 flow [2024-06-21 16:09:54,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1756, PETRI_PLACES=135, PETRI_TRANSITIONS=176} [2024-06-21 16:09:54,334 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-21 16:09:54,334 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 176 transitions, 1756 flow [2024-06-21 16:09:54,335 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) [2024-06-21 16:09:54,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:54,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:54,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:09:54,335 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:54,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:54,335 INFO L85 PathProgramCache]: Analyzing trace with hash 751527316, now seen corresponding path program 3 times [2024-06-21 16:09:54,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:54,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741912582] [2024-06-21 16:09:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:54,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:55,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:55,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741912582] [2024-06-21 16:09:55,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741912582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:55,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:55,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:55,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064415635] [2024-06-21 16:09:55,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:55,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:55,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:55,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:55,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:55,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:55,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 176 transitions, 1756 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) [2024-06-21 16:09:55,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:55,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:55,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:56,382 INFO L124 PetriNetUnfolderBase]: 2580/3906 cut-off events. [2024-06-21 16:09:56,383 INFO L125 PetriNetUnfolderBase]: For 171745/171752 co-relation queries the response was YES. [2024-06-21 16:09:56,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26506 conditions, 3906 events. 2580/3906 cut-off events. For 171745/171752 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19759 event pairs, 756 based on Foata normal form. 8/3911 useless extension candidates. Maximal degree in co-relation 26448. Up to 3500 conditions per place. [2024-06-21 16:09:56,410 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 136 selfloop transitions, 75 changer transitions 0/216 dead transitions. [2024-06-21 16:09:56,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 216 transitions, 2470 flow [2024-06-21 16:09:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 16:09:56,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-21 16:09:56,411 INFO L175 Difference]: Start difference. First operand has 135 places, 176 transitions, 1756 flow. Second operand 9 states and 181 transitions. [2024-06-21 16:09:56,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 216 transitions, 2470 flow [2024-06-21 16:09:56,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 216 transitions, 2288 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:09:56,547 INFO L231 Difference]: Finished difference. Result has 136 places, 179 transitions, 1776 flow [2024-06-21 16:09:56,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1776, PETRI_PLACES=136, PETRI_TRANSITIONS=179} [2024-06-21 16:09:56,548 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-21 16:09:56,548 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 179 transitions, 1776 flow [2024-06-21 16:09:56,548 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) [2024-06-21 16:09:56,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:56,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:56,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:09:56,548 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:56,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:56,549 INFO L85 PathProgramCache]: Analyzing trace with hash 924254542, now seen corresponding path program 4 times [2024-06-21 16:09:56,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:56,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420750348] [2024-06-21 16:09:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:56,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:57,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:57,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420750348] [2024-06-21 16:09:57,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420750348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:57,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:57,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:57,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136791295] [2024-06-21 16:09:57,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:57,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:57,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:57,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:57,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:57,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 179 transitions, 1776 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) [2024-06-21 16:09:57,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:57,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:57,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:58,588 INFO L124 PetriNetUnfolderBase]: 2634/3984 cut-off events. [2024-06-21 16:09:58,588 INFO L125 PetriNetUnfolderBase]: For 184990/184993 co-relation queries the response was YES. [2024-06-21 16:09:58,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27185 conditions, 3984 events. 2634/3984 cut-off events. For 184990/184993 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20186 event pairs, 714 based on Foata normal form. 4/3985 useless extension candidates. Maximal degree in co-relation 27126. Up to 3234 conditions per place. [2024-06-21 16:09:58,617 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 127 selfloop transitions, 92 changer transitions 0/224 dead transitions. [2024-06-21 16:09:58,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 224 transitions, 2678 flow [2024-06-21 16:09:58,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 16:09:58,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-21 16:09:58,620 INFO L175 Difference]: Start difference. First operand has 136 places, 179 transitions, 1776 flow. Second operand 9 states and 188 transitions. [2024-06-21 16:09:58,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 224 transitions, 2678 flow [2024-06-21 16:09:58,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 224 transitions, 2535 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:09:58,816 INFO L231 Difference]: Finished difference. Result has 139 places, 185 transitions, 1903 flow [2024-06-21 16:09:58,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1903, PETRI_PLACES=139, PETRI_TRANSITIONS=185} [2024-06-21 16:09:58,817 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-21 16:09:58,817 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 185 transitions, 1903 flow [2024-06-21 16:09:58,817 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) [2024-06-21 16:09:58,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:58,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:58,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:09:58,817 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:58,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:58,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1270586306, now seen corresponding path program 5 times [2024-06-21 16:09:58,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:58,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337931606] [2024-06-21 16:09:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:58,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:59,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:59,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337931606] [2024-06-21 16:09:59,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337931606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:59,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:59,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:59,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760940573] [2024-06-21 16:09:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:59,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:59,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:59,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:09:59,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 185 transitions, 1903 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) [2024-06-21 16:09:59,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:59,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:09:59,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:01,019 INFO L124 PetriNetUnfolderBase]: 2656/4016 cut-off events. [2024-06-21 16:10:01,019 INFO L125 PetriNetUnfolderBase]: For 196072/196075 co-relation queries the response was YES. [2024-06-21 16:10:01,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27800 conditions, 4016 events. 2656/4016 cut-off events. For 196072/196075 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20389 event pairs, 709 based on Foata normal form. 4/4017 useless extension candidates. Maximal degree in co-relation 27740. Up to 3253 conditions per place. [2024-06-21 16:10:01,047 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 134 selfloop transitions, 90 changer transitions 0/229 dead transitions. [2024-06-21 16:10:01,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 229 transitions, 2800 flow [2024-06-21 16:10:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-21 16:10:01,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2024-06-21 16:10:01,049 INFO L175 Difference]: Start difference. First operand has 139 places, 185 transitions, 1903 flow. Second operand 9 states and 191 transitions. [2024-06-21 16:10:01,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 229 transitions, 2800 flow [2024-06-21 16:10:01,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 229 transitions, 2650 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:01,233 INFO L231 Difference]: Finished difference. Result has 143 places, 188 transitions, 1986 flow [2024-06-21 16:10:01,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1986, PETRI_PLACES=143, PETRI_TRANSITIONS=188} [2024-06-21 16:10:01,234 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-21 16:10:01,234 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 188 transitions, 1986 flow [2024-06-21 16:10:01,234 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) [2024-06-21 16:10:01,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:01,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:01,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:10:01,234 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:01,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:01,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1270592816, now seen corresponding path program 6 times [2024-06-21 16:10:01,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:01,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357877059] [2024-06-21 16:10:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:01,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:02,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:02,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357877059] [2024-06-21 16:10:02,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357877059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:02,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:02,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:02,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561240300] [2024-06-21 16:10:02,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:02,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:02,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:02,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:02,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:02,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:02,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 188 transitions, 1986 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) [2024-06-21 16:10:02,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:02,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:02,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:03,391 INFO L124 PetriNetUnfolderBase]: 2646/4007 cut-off events. [2024-06-21 16:10:03,391 INFO L125 PetriNetUnfolderBase]: For 204590/204593 co-relation queries the response was YES. [2024-06-21 16:10:03,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27889 conditions, 4007 events. 2646/4007 cut-off events. For 204590/204593 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20343 event pairs, 707 based on Foata normal form. 4/4008 useless extension candidates. Maximal degree in co-relation 27828. Up to 3245 conditions per place. [2024-06-21 16:10:03,421 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 131 selfloop transitions, 91 changer transitions 0/227 dead transitions. [2024-06-21 16:10:03,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 227 transitions, 2698 flow [2024-06-21 16:10:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 16:10:03,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-21 16:10:03,423 INFO L175 Difference]: Start difference. First operand has 143 places, 188 transitions, 1986 flow. Second operand 9 states and 188 transitions. [2024-06-21 16:10:03,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 227 transitions, 2698 flow [2024-06-21 16:10:03,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 227 transitions, 2459 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 16:10:03,602 INFO L231 Difference]: Finished difference. Result has 145 places, 188 transitions, 1937 flow [2024-06-21 16:10:03,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1937, PETRI_PLACES=145, PETRI_TRANSITIONS=188} [2024-06-21 16:10:03,603 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-21 16:10:03,603 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 188 transitions, 1937 flow [2024-06-21 16:10:03,603 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) [2024-06-21 16:10:03,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:03,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:03,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:10:03,603 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:03,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:03,603 INFO L85 PathProgramCache]: Analyzing trace with hash 924017206, now seen corresponding path program 4 times [2024-06-21 16:10:03,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:03,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688786354] [2024-06-21 16:10:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:03,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:04,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:04,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688786354] [2024-06-21 16:10:04,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688786354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:04,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:04,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:04,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638113624] [2024-06-21 16:10:04,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:04,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:04,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:04,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:04,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:04,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:04,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 188 transitions, 1937 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) [2024-06-21 16:10:04,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:04,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:04,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:05,597 INFO L124 PetriNetUnfolderBase]: 2657/4023 cut-off events. [2024-06-21 16:10:05,597 INFO L125 PetriNetUnfolderBase]: For 213298/213301 co-relation queries the response was YES. [2024-06-21 16:10:05,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28200 conditions, 4023 events. 2657/4023 cut-off events. For 213298/213301 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20397 event pairs, 768 based on Foata normal form. 4/4024 useless extension candidates. Maximal degree in co-relation 28138. Up to 3608 conditions per place. [2024-06-21 16:10:05,628 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 145 selfloop transitions, 75 changer transitions 0/225 dead transitions. [2024-06-21 16:10:05,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 225 transitions, 2676 flow [2024-06-21 16:10:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 16:10:05,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-21 16:10:05,630 INFO L175 Difference]: Start difference. First operand has 145 places, 188 transitions, 1937 flow. Second operand 9 states and 179 transitions. [2024-06-21 16:10:05,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 225 transitions, 2676 flow [2024-06-21 16:10:05,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 225 transitions, 2488 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:10:05,832 INFO L231 Difference]: Finished difference. Result has 146 places, 191 transitions, 1954 flow [2024-06-21 16:10:05,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1954, PETRI_PLACES=146, PETRI_TRANSITIONS=191} [2024-06-21 16:10:05,832 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-21 16:10:05,833 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 191 transitions, 1954 flow [2024-06-21 16:10:05,833 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) [2024-06-21 16:10:05,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:05,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:05,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:10:05,833 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)] === [2024-06-21 16:10:05,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash 519464384, now seen corresponding path program 1 times [2024-06-21 16:10:05,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:05,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585977116] [2024-06-21 16:10:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:05,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:06,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:06,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585977116] [2024-06-21 16:10:06,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585977116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:06,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:06,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:10:06,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929367024] [2024-06-21 16:10:06,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:06,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:10:06,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:06,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:10:06,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:10:06,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:10:06,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 191 transitions, 1954 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:06,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:06,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:10:06,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:07,233 INFO L124 PetriNetUnfolderBase]: 2195/3552 cut-off events. [2024-06-21 16:10:07,233 INFO L125 PetriNetUnfolderBase]: For 221114/221118 co-relation queries the response was YES. [2024-06-21 16:10:07,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25709 conditions, 3552 events. 2195/3552 cut-off events. For 221114/221118 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19787 event pairs, 708 based on Foata normal form. 5/3551 useless extension candidates. Maximal degree in co-relation 25646. Up to 3040 conditions per place. [2024-06-21 16:10:07,261 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 136 selfloop transitions, 13 changer transitions 0/210 dead transitions. [2024-06-21 16:10:07,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 210 transitions, 2334 flow [2024-06-21 16:10:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:10:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:10:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-21 16:10:07,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-21 16:10:07,262 INFO L175 Difference]: Start difference. First operand has 146 places, 191 transitions, 1954 flow. Second operand 6 states and 129 transitions. [2024-06-21 16:10:07,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 210 transitions, 2334 flow [2024-06-21 16:10:07,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 210 transitions, 2186 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:07,432 INFO L231 Difference]: Finished difference. Result has 146 places, 194 transitions, 1873 flow [2024-06-21 16:10:07,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1873, PETRI_PLACES=146, PETRI_TRANSITIONS=194} [2024-06-21 16:10:07,432 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-21 16:10:07,433 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 194 transitions, 1873 flow [2024-06-21 16:10:07,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:07,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:07,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:07,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:10:07,433 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)] === [2024-06-21 16:10:07,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:07,434 INFO L85 PathProgramCache]: Analyzing trace with hash 540608684, now seen corresponding path program 7 times [2024-06-21 16:10:07,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:07,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228758185] [2024-06-21 16:10:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:07,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:08,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:08,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228758185] [2024-06-21 16:10:08,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228758185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:08,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:08,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:08,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302422419] [2024-06-21 16:10:08,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:08,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:08,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:08,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:08,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:08,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:08,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 194 transitions, 1873 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) [2024-06-21 16:10:08,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:08,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:08,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:09,514 INFO L124 PetriNetUnfolderBase]: 2684/4067 cut-off events. [2024-06-21 16:10:09,514 INFO L125 PetriNetUnfolderBase]: For 235618/235621 co-relation queries the response was YES. [2024-06-21 16:10:09,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28921 conditions, 4067 events. 2684/4067 cut-off events. For 235618/235621 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20740 event pairs, 721 based on Foata normal form. 6/4060 useless extension candidates. Maximal degree in co-relation 28857. Up to 3287 conditions per place. [2024-06-21 16:10:09,542 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 122 selfloop transitions, 104 changer transitions 0/231 dead transitions. [2024-06-21 16:10:09,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 231 transitions, 2625 flow [2024-06-21 16:10:09,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:09,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 16:10:09,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-21 16:10:09,543 INFO L175 Difference]: Start difference. First operand has 146 places, 194 transitions, 1873 flow. Second operand 9 states and 181 transitions. [2024-06-21 16:10:09,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 231 transitions, 2625 flow [2024-06-21 16:10:09,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 231 transitions, 2582 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 16:10:09,739 INFO L231 Difference]: Finished difference. Result has 151 places, 197 transitions, 2088 flow [2024-06-21 16:10:09,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2088, PETRI_PLACES=151, PETRI_TRANSITIONS=197} [2024-06-21 16:10:09,740 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-21 16:10:09,740 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 197 transitions, 2088 flow [2024-06-21 16:10:09,740 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) [2024-06-21 16:10:09,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:09,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:09,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:10:09,740 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)] === [2024-06-21 16:10:09,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:09,741 INFO L85 PathProgramCache]: Analyzing trace with hash 219306232, now seen corresponding path program 8 times [2024-06-21 16:10:09,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:09,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932318768] [2024-06-21 16:10:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:09,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:10,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:10,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932318768] [2024-06-21 16:10:10,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932318768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:10,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:10,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:10,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980187607] [2024-06-21 16:10:10,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:10,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:10,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:10,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:10,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:10,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:10,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 197 transitions, 2088 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) [2024-06-21 16:10:10,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:10,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:10,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:11,769 INFO L124 PetriNetUnfolderBase]: 2738/4150 cut-off events. [2024-06-21 16:10:11,770 INFO L125 PetriNetUnfolderBase]: For 252138/252141 co-relation queries the response was YES. [2024-06-21 16:10:11,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30210 conditions, 4150 events. 2738/4150 cut-off events. For 252138/252141 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21153 event pairs, 709 based on Foata normal form. 6/4143 useless extension candidates. Maximal degree in co-relation 30145. Up to 3333 conditions per place. [2024-06-21 16:10:11,803 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 137 selfloop transitions, 100 changer transitions 0/242 dead transitions. [2024-06-21 16:10:11,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 242 transitions, 3094 flow [2024-06-21 16:10:11,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 16:10:11,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-21 16:10:11,804 INFO L175 Difference]: Start difference. First operand has 151 places, 197 transitions, 2088 flow. Second operand 9 states and 186 transitions. [2024-06-21 16:10:11,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 242 transitions, 3094 flow [2024-06-21 16:10:11,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 242 transitions, 2906 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:11,992 INFO L231 Difference]: Finished difference. Result has 154 places, 203 transitions, 2204 flow [2024-06-21 16:10:11,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2204, PETRI_PLACES=154, PETRI_TRANSITIONS=203} [2024-06-21 16:10:11,993 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-21 16:10:11,993 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 203 transitions, 2204 flow [2024-06-21 16:10:11,993 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) [2024-06-21 16:10:11,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:11,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:11,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:10:11,994 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)] === [2024-06-21 16:10:11,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:11,994 INFO L85 PathProgramCache]: Analyzing trace with hash 255508814, now seen corresponding path program 9 times [2024-06-21 16:10:11,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:11,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179847368] [2024-06-21 16:10:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:11,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:12,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:12,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179847368] [2024-06-21 16:10:12,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179847368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:12,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:12,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:12,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314228475] [2024-06-21 16:10:12,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:12,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:12,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:12,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:12,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:12,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:12,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 203 transitions, 2204 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) [2024-06-21 16:10:12,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:12,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:12,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:13,970 INFO L124 PetriNetUnfolderBase]: 2728/4131 cut-off events. [2024-06-21 16:10:13,970 INFO L125 PetriNetUnfolderBase]: For 261049/261052 co-relation queries the response was YES. [2024-06-21 16:10:13,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30239 conditions, 4131 events. 2728/4131 cut-off events. For 261049/261052 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 21001 event pairs, 716 based on Foata normal form. 6/4124 useless extension candidates. Maximal degree in co-relation 30173. Up to 3325 conditions per place. [2024-06-21 16:10:14,005 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 135 selfloop transitions, 99 changer transitions 0/239 dead transitions. [2024-06-21 16:10:14,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 239 transitions, 2948 flow [2024-06-21 16:10:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:14,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 16:10:14,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-21 16:10:14,006 INFO L175 Difference]: Start difference. First operand has 154 places, 203 transitions, 2204 flow. Second operand 9 states and 185 transitions. [2024-06-21 16:10:14,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 239 transitions, 2948 flow [2024-06-21 16:10:14,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 239 transitions, 2643 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 16:10:14,190 INFO L231 Difference]: Finished difference. Result has 156 places, 203 transitions, 2105 flow [2024-06-21 16:10:14,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2105, PETRI_PLACES=156, PETRI_TRANSITIONS=203} [2024-06-21 16:10:14,190 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-21 16:10:14,190 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 203 transitions, 2105 flow [2024-06-21 16:10:14,191 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) [2024-06-21 16:10:14,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:14,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:14,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:10:14,191 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)] === [2024-06-21 16:10:14,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash 255271664, now seen corresponding path program 10 times [2024-06-21 16:10:14,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:14,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61821272] [2024-06-21 16:10:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:14,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:15,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:15,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61821272] [2024-06-21 16:10:15,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61821272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:15,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:15,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:15,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114407858] [2024-06-21 16:10:15,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:15,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:15,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:15,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:15,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:15,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:15,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 203 transitions, 2105 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) [2024-06-21 16:10:15,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:15,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:15,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:16,235 INFO L124 PetriNetUnfolderBase]: 2718/4117 cut-off events. [2024-06-21 16:10:16,235 INFO L125 PetriNetUnfolderBase]: For 267924/267927 co-relation queries the response was YES. [2024-06-21 16:10:16,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30202 conditions, 4117 events. 2718/4117 cut-off events. For 267924/267927 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 20988 event pairs, 707 based on Foata normal form. 6/4110 useless extension candidates. Maximal degree in co-relation 30135. Up to 3317 conditions per place. [2024-06-21 16:10:16,269 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 131 selfloop transitions, 102 changer transitions 0/238 dead transitions. [2024-06-21 16:10:16,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 238 transitions, 2691 flow [2024-06-21 16:10:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 16:10:16,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-21 16:10:16,271 INFO L175 Difference]: Start difference. First operand has 156 places, 203 transitions, 2105 flow. Second operand 9 states and 181 transitions. [2024-06-21 16:10:16,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 238 transitions, 2691 flow [2024-06-21 16:10:16,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 238 transitions, 2390 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 16:10:16,490 INFO L231 Difference]: Finished difference. Result has 156 places, 203 transitions, 2016 flow [2024-06-21 16:10:16,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2016, PETRI_PLACES=156, PETRI_TRANSITIONS=203} [2024-06-21 16:10:16,490 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-21 16:10:16,490 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 203 transitions, 2016 flow [2024-06-21 16:10:16,490 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) [2024-06-21 16:10:16,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:16,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:16,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:10:16,491 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)] === [2024-06-21 16:10:16,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:16,491 INFO L85 PathProgramCache]: Analyzing trace with hash 255271478, now seen corresponding path program 5 times [2024-06-21 16:10:16,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:16,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252676870] [2024-06-21 16:10:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:16,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:17,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:17,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252676870] [2024-06-21 16:10:17,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252676870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:17,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:17,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:17,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100522578] [2024-06-21 16:10:17,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:17,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:17,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:17,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:17,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:17,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:17,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 203 transitions, 2016 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) [2024-06-21 16:10:17,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:17,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:17,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:18,608 INFO L124 PetriNetUnfolderBase]: 2713/4113 cut-off events. [2024-06-21 16:10:18,608 INFO L125 PetriNetUnfolderBase]: For 275776/275776 co-relation queries the response was YES. [2024-06-21 16:10:18,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30281 conditions, 4113 events. 2713/4113 cut-off events. For 275776/275776 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 20880 event pairs, 793 based on Foata normal form. 2/4100 useless extension candidates. Maximal degree in co-relation 30213. Up to 3692 conditions per place. [2024-06-21 16:10:18,636 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 151 selfloop transitions, 75 changer transitions 0/231 dead transitions. [2024-06-21 16:10:18,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 231 transitions, 2560 flow [2024-06-21 16:10:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 16:10:18,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 16:10:18,638 INFO L175 Difference]: Start difference. First operand has 156 places, 203 transitions, 2016 flow. Second operand 9 states and 174 transitions. [2024-06-21 16:10:18,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 231 transitions, 2560 flow [2024-06-21 16:10:18,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 231 transitions, 2274 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 16:10:18,852 INFO L231 Difference]: Finished difference. Result has 156 places, 203 transitions, 1888 flow [2024-06-21 16:10:18,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1888, PETRI_PLACES=156, PETRI_TRANSITIONS=203} [2024-06-21 16:10:18,852 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-21 16:10:18,852 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 203 transitions, 1888 flow [2024-06-21 16:10:18,853 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) [2024-06-21 16:10:18,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:18,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:18,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:10:18,853 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:18,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:18,853 INFO L85 PathProgramCache]: Analyzing trace with hash 989880654, now seen corresponding path program 2 times [2024-06-21 16:10:18,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:18,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196927021] [2024-06-21 16:10:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:18,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:19,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:19,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196927021] [2024-06-21 16:10:19,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196927021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:19,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:19,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:10:19,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601029382] [2024-06-21 16:10:19,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:19,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:10:19,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:19,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:10:19,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:10:19,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:10:19,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 203 transitions, 1888 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:19,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:19,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:10:19,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:20,399 INFO L124 PetriNetUnfolderBase]: 2212/3594 cut-off events. [2024-06-21 16:10:20,399 INFO L125 PetriNetUnfolderBase]: For 283326/283341 co-relation queries the response was YES. [2024-06-21 16:10:20,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27353 conditions, 3594 events. 2212/3594 cut-off events. For 283326/283341 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20190 event pairs, 711 based on Foata normal form. 11/3593 useless extension candidates. Maximal degree in co-relation 27284. Up to 3051 conditions per place. [2024-06-21 16:10:20,428 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 135 selfloop transitions, 18 changer transitions 0/217 dead transitions. [2024-06-21 16:10:20,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 217 transitions, 2266 flow [2024-06-21 16:10:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:10:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:10:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-21 16:10:20,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-21 16:10:20,429 INFO L175 Difference]: Start difference. First operand has 156 places, 203 transitions, 1888 flow. Second operand 6 states and 125 transitions. [2024-06-21 16:10:20,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 217 transitions, 2266 flow [2024-06-21 16:10:20,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 217 transitions, 2010 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 16:10:20,596 INFO L231 Difference]: Finished difference. Result has 152 places, 206 transitions, 1714 flow [2024-06-21 16:10:20,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1714, PETRI_PLACES=152, PETRI_TRANSITIONS=206} [2024-06-21 16:10:20,597 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-21 16:10:20,597 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 206 transitions, 1714 flow [2024-06-21 16:10:20,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:20,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:20,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:20,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:10:20,597 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:20,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:20,598 INFO L85 PathProgramCache]: Analyzing trace with hash 533519970, now seen corresponding path program 1 times [2024-06-21 16:10:20,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:20,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564052044] [2024-06-21 16:10:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:20,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:21,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:21,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564052044] [2024-06-21 16:10:21,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564052044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:21,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:21,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:10:21,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074892147] [2024-06-21 16:10:21,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:21,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:10:21,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:21,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:10:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:10:21,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:10:21,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 206 transitions, 1714 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:21,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:21,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:10:21,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:22,091 INFO L124 PetriNetUnfolderBase]: 2243/3607 cut-off events. [2024-06-21 16:10:22,091 INFO L125 PetriNetUnfolderBase]: For 251209/251209 co-relation queries the response was YES. [2024-06-21 16:10:22,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26259 conditions, 3607 events. 2243/3607 cut-off events. For 251209/251209 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19600 event pairs, 641 based on Foata normal form. 1/3585 useless extension candidates. Maximal degree in co-relation 26189. Up to 3248 conditions per place. [2024-06-21 16:10:22,124 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 185 selfloop transitions, 11 changer transitions 0/221 dead transitions. [2024-06-21 16:10:22,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 221 transitions, 2178 flow [2024-06-21 16:10:22,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:10:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:10:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 16:10:22,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 16:10:22,128 INFO L175 Difference]: Start difference. First operand has 152 places, 206 transitions, 1714 flow. Second operand 6 states and 121 transitions. [2024-06-21 16:10:22,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 221 transitions, 2178 flow [2024-06-21 16:10:22,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 221 transitions, 2118 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 16:10:22,318 INFO L231 Difference]: Finished difference. Result has 154 places, 209 transitions, 1724 flow [2024-06-21 16:10:22,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1724, PETRI_PLACES=154, PETRI_TRANSITIONS=209} [2024-06-21 16:10:22,318 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-21 16:10:22,319 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 209 transitions, 1724 flow [2024-06-21 16:10:22,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:22,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:22,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:22,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:10:22,319 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:22,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash 533757120, now seen corresponding path program 2 times [2024-06-21 16:10:22,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:22,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877224981] [2024-06-21 16:10:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:22,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:23,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:23,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877224981] [2024-06-21 16:10:23,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877224981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:23,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:23,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:10:23,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85149108] [2024-06-21 16:10:23,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:23,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:10:23,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:23,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:10:23,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:10:23,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:10:23,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 209 transitions, 1724 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:23,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:23,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:10:23,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:23,718 INFO L124 PetriNetUnfolderBase]: 2240/3604 cut-off events. [2024-06-21 16:10:23,718 INFO L125 PetriNetUnfolderBase]: For 259558/259561 co-relation queries the response was YES. [2024-06-21 16:10:23,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26695 conditions, 3604 events. 2240/3604 cut-off events. For 259558/259561 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19638 event pairs, 645 based on Foata normal form. 3/3583 useless extension candidates. Maximal degree in co-relation 26624. Up to 3238 conditions per place. [2024-06-21 16:10:23,746 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 180 selfloop transitions, 16 changer transitions 0/221 dead transitions. [2024-06-21 16:10:23,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 221 transitions, 2184 flow [2024-06-21 16:10:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:10:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:10:23,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 16:10:23,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:10:23,748 INFO L175 Difference]: Start difference. First operand has 154 places, 209 transitions, 1724 flow. Second operand 6 states and 120 transitions. [2024-06-21 16:10:23,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 221 transitions, 2184 flow [2024-06-21 16:10:23,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 221 transitions, 2136 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 16:10:23,942 INFO L231 Difference]: Finished difference. Result has 156 places, 212 transitions, 1762 flow [2024-06-21 16:10:23,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1762, PETRI_PLACES=156, PETRI_TRANSITIONS=212} [2024-06-21 16:10:23,942 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-21 16:10:23,942 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 212 transitions, 1762 flow [2024-06-21 16:10:23,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:23,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:23,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:23,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:10:23,943 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)] === [2024-06-21 16:10:23,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:23,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1674901968, now seen corresponding path program 1 times [2024-06-21 16:10:23,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:23,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305103458] [2024-06-21 16:10:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:23,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:25,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:25,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305103458] [2024-06-21 16:10:25,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305103458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:25,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:25,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:10:25,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957090159] [2024-06-21 16:10:25,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:25,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:10:25,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:25,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:10:25,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:10:25,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:25,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 212 transitions, 1762 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) [2024-06-21 16:10:25,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:25,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:25,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:26,125 INFO L124 PetriNetUnfolderBase]: 2734/4152 cut-off events. [2024-06-21 16:10:26,125 INFO L125 PetriNetUnfolderBase]: For 322701/322705 co-relation queries the response was YES. [2024-06-21 16:10:26,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31787 conditions, 4152 events. 2734/4152 cut-off events. For 322701/322705 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 21273 event pairs, 759 based on Foata normal form. 8/4158 useless extension candidates. Maximal degree in co-relation 31715. Up to 3902 conditions per place. [2024-06-21 16:10:26,159 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 225 selfloop transitions, 30 changer transitions 0/260 dead transitions. [2024-06-21 16:10:26,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 260 transitions, 2472 flow [2024-06-21 16:10:26,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 16:10:26,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-21 16:10:26,161 INFO L175 Difference]: Start difference. First operand has 156 places, 212 transitions, 1762 flow. Second operand 10 states and 196 transitions. [2024-06-21 16:10:26,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 260 transitions, 2472 flow [2024-06-21 16:10:26,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 2408 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:10:26,469 INFO L231 Difference]: Finished difference. Result has 162 places, 215 transitions, 1824 flow [2024-06-21 16:10:26,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1824, PETRI_PLACES=162, PETRI_TRANSITIONS=215} [2024-06-21 16:10:26,469 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 117 predicate places. [2024-06-21 16:10:26,470 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 215 transitions, 1824 flow [2024-06-21 16:10:26,470 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) [2024-06-21 16:10:26,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:26,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:26,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:10:26,470 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)] === [2024-06-21 16:10:26,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:26,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1735299326, now seen corresponding path program 2 times [2024-06-21 16:10:26,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:26,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132687910] [2024-06-21 16:10:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:26,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:27,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:27,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132687910] [2024-06-21 16:10:27,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132687910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:27,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:27,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:10:27,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36989746] [2024-06-21 16:10:27,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:27,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:10:27,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:27,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:10:27,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:10:27,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:27,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 215 transitions, 1824 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) [2024-06-21 16:10:27,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:27,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:27,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:28,788 INFO L124 PetriNetUnfolderBase]: 2788/4245 cut-off events. [2024-06-21 16:10:28,788 INFO L125 PetriNetUnfolderBase]: For 341927/341934 co-relation queries the response was YES. [2024-06-21 16:10:28,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33208 conditions, 4245 events. 2788/4245 cut-off events. For 341927/341934 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21986 event pairs, 657 based on Foata normal form. 8/4250 useless extension candidates. Maximal degree in co-relation 33135. Up to 3170 conditions per place. [2024-06-21 16:10:28,825 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 139 selfloop transitions, 129 changer transitions 0/273 dead transitions. [2024-06-21 16:10:28,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 273 transitions, 3050 flow [2024-06-21 16:10:28,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-21 16:10:28,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-21 16:10:28,827 INFO L175 Difference]: Start difference. First operand has 162 places, 215 transitions, 1824 flow. Second operand 10 states and 213 transitions. [2024-06-21 16:10:28,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 273 transitions, 3050 flow [2024-06-21 16:10:29,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 273 transitions, 2948 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 16:10:29,126 INFO L231 Difference]: Finished difference. Result has 164 places, 224 transitions, 2168 flow [2024-06-21 16:10:29,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2168, PETRI_PLACES=164, PETRI_TRANSITIONS=224} [2024-06-21 16:10:29,127 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2024-06-21 16:10:29,127 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 224 transitions, 2168 flow [2024-06-21 16:10:29,127 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) [2024-06-21 16:10:29,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:29,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:29,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:10:29,128 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)] === [2024-06-21 16:10:29,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:29,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1678621038, now seen corresponding path program 3 times [2024-06-21 16:10:29,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:29,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372877469] [2024-06-21 16:10:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:29,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:30,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:30,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372877469] [2024-06-21 16:10:30,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372877469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:30,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:30,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:10:30,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455897516] [2024-06-21 16:10:30,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:30,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:10:30,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:30,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:10:30,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:10:30,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:30,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 224 transitions, 2168 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) [2024-06-21 16:10:30,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:30,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:30,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:31,461 INFO L124 PetriNetUnfolderBase]: 2778/4231 cut-off events. [2024-06-21 16:10:31,461 INFO L125 PetriNetUnfolderBase]: For 354460/354467 co-relation queries the response was YES. [2024-06-21 16:10:31,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33904 conditions, 4231 events. 2778/4231 cut-off events. For 354460/354467 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 21878 event pairs, 655 based on Foata normal form. 8/4236 useless extension candidates. Maximal degree in co-relation 33830. Up to 3162 conditions per place. [2024-06-21 16:10:31,500 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 139 selfloop transitions, 128 changer transitions 0/272 dead transitions. [2024-06-21 16:10:31,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 272 transitions, 3042 flow [2024-06-21 16:10:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-21 16:10:31,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-21 16:10:31,501 INFO L175 Difference]: Start difference. First operand has 164 places, 224 transitions, 2168 flow. Second operand 10 states and 213 transitions. [2024-06-21 16:10:31,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 272 transitions, 3042 flow [2024-06-21 16:10:31,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 272 transitions, 2838 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:31,877 INFO L231 Difference]: Finished difference. Result has 169 places, 224 transitions, 2228 flow [2024-06-21 16:10:31,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1964, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2228, PETRI_PLACES=169, PETRI_TRANSITIONS=224} [2024-06-21 16:10:31,878 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-21 16:10:31,878 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 224 transitions, 2228 flow [2024-06-21 16:10:31,878 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) [2024-06-21 16:10:31,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:31,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:31,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:10:31,879 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)] === [2024-06-21 16:10:31,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:31,879 INFO L85 PathProgramCache]: Analyzing trace with hash -586029402, now seen corresponding path program 4 times [2024-06-21 16:10:31,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:31,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238534107] [2024-06-21 16:10:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:31,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:32,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:32,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238534107] [2024-06-21 16:10:32,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238534107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:32,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:32,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:10:32,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912622765] [2024-06-21 16:10:32,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:32,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:10:32,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:32,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:10:32,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:10:33,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:33,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 224 transitions, 2228 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) [2024-06-21 16:10:33,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:33,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:33,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:34,177 INFO L124 PetriNetUnfolderBase]: 2832/4328 cut-off events. [2024-06-21 16:10:34,177 INFO L125 PetriNetUnfolderBase]: For 372683/372690 co-relation queries the response was YES. [2024-06-21 16:10:34,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35174 conditions, 4328 events. 2832/4328 cut-off events. For 372683/372690 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 22580 event pairs, 673 based on Foata normal form. 8/4333 useless extension candidates. Maximal degree in co-relation 35098. Up to 3208 conditions per place. [2024-06-21 16:10:34,215 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 148 selfloop transitions, 125 changer transitions 0/278 dead transitions. [2024-06-21 16:10:34,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 278 transitions, 3422 flow [2024-06-21 16:10:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:34,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:34,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 16:10:34,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-21 16:10:34,217 INFO L175 Difference]: Start difference. First operand has 169 places, 224 transitions, 2228 flow. Second operand 10 states and 211 transitions. [2024-06-21 16:10:34,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 278 transitions, 3422 flow [2024-06-21 16:10:34,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 278 transitions, 3136 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 16:10:34,588 INFO L231 Difference]: Finished difference. Result has 170 places, 230 transitions, 2316 flow [2024-06-21 16:10:34,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2316, PETRI_PLACES=170, PETRI_TRANSITIONS=230} [2024-06-21 16:10:34,589 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 125 predicate places. [2024-06-21 16:10:34,589 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 230 transitions, 2316 flow [2024-06-21 16:10:34,589 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) [2024-06-21 16:10:34,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:34,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:34,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:10:34,590 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)] === [2024-06-21 16:10:34,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:34,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1614170264, now seen corresponding path program 5 times [2024-06-21 16:10:34,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:34,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700665951] [2024-06-21 16:10:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:34,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:35,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:35,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700665951] [2024-06-21 16:10:35,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700665951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:35,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:35,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:10:35,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535664665] [2024-06-21 16:10:35,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:35,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:10:35,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:35,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:10:35,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:10:35,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:35,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 230 transitions, 2316 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) [2024-06-21 16:10:35,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:35,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:35,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:36,928 INFO L124 PetriNetUnfolderBase]: 2854/4365 cut-off events. [2024-06-21 16:10:36,928 INFO L125 PetriNetUnfolderBase]: For 387518/387525 co-relation queries the response was YES. [2024-06-21 16:10:36,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35607 conditions, 4365 events. 2854/4365 cut-off events. For 387518/387525 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22894 event pairs, 668 based on Foata normal form. 8/4370 useless extension candidates. Maximal degree in co-relation 35530. Up to 3227 conditions per place. [2024-06-21 16:10:36,969 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 152 selfloop transitions, 125 changer transitions 0/282 dead transitions. [2024-06-21 16:10:36,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 282 transitions, 3472 flow [2024-06-21 16:10:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:37,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-21 16:10:37,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-21 16:10:37,057 INFO L175 Difference]: Start difference. First operand has 170 places, 230 transitions, 2316 flow. Second operand 10 states and 214 transitions. [2024-06-21 16:10:37,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 282 transitions, 3472 flow [2024-06-21 16:10:37,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 282 transitions, 3256 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:37,401 INFO L231 Difference]: Finished difference. Result has 174 places, 233 transitions, 2416 flow [2024-06-21 16:10:37,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2416, PETRI_PLACES=174, PETRI_TRANSITIONS=233} [2024-06-21 16:10:37,402 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-21 16:10:37,402 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 233 transitions, 2416 flow [2024-06-21 16:10:37,402 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) [2024-06-21 16:10:37,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:37,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:37,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:10:37,403 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)] === [2024-06-21 16:10:37,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:37,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1614175844, now seen corresponding path program 6 times [2024-06-21 16:10:37,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:37,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312803662] [2024-06-21 16:10:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:37,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:38,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:38,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312803662] [2024-06-21 16:10:38,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312803662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:38,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:38,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:10:38,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113807446] [2024-06-21 16:10:38,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:38,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:10:38,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:38,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:10:38,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:10:38,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:38,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 233 transitions, 2416 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) [2024-06-21 16:10:38,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:38,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:38,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:39,776 INFO L124 PetriNetUnfolderBase]: 2844/4351 cut-off events. [2024-06-21 16:10:39,776 INFO L125 PetriNetUnfolderBase]: For 397604/397611 co-relation queries the response was YES. [2024-06-21 16:10:39,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35581 conditions, 4351 events. 2844/4351 cut-off events. For 397604/397611 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22789 event pairs, 666 based on Foata normal form. 8/4356 useless extension candidates. Maximal degree in co-relation 35503. Up to 3219 conditions per place. [2024-06-21 16:10:39,812 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 149 selfloop transitions, 126 changer transitions 0/280 dead transitions. [2024-06-21 16:10:39,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 280 transitions, 3318 flow [2024-06-21 16:10:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:39,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 16:10:39,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-21 16:10:39,813 INFO L175 Difference]: Start difference. First operand has 174 places, 233 transitions, 2416 flow. Second operand 10 states and 211 transitions. [2024-06-21 16:10:39,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 280 transitions, 3318 flow [2024-06-21 16:10:40,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 280 transitions, 3044 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 16:10:40,235 INFO L231 Difference]: Finished difference. Result has 177 places, 233 transitions, 2402 flow [2024-06-21 16:10:40,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2402, PETRI_PLACES=177, PETRI_TRANSITIONS=233} [2024-06-21 16:10:40,236 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-06-21 16:10:40,236 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 233 transitions, 2402 flow [2024-06-21 16:10:40,236 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) [2024-06-21 16:10:40,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:40,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:40,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:10:40,236 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:40,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:40,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1076859666, now seen corresponding path program 1 times [2024-06-21 16:10:40,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:40,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783118702] [2024-06-21 16:10:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:40,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:41,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:41,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783118702] [2024-06-21 16:10:41,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783118702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:41,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:41,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:41,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313576082] [2024-06-21 16:10:41,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:41,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:41,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:41,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:41,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:41,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:10:41,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 233 transitions, 2402 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:41,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:41,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:10:41,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:41,924 INFO L124 PetriNetUnfolderBase]: 2518/4001 cut-off events. [2024-06-21 16:10:41,925 INFO L125 PetriNetUnfolderBase]: For 406122/406126 co-relation queries the response was YES. [2024-06-21 16:10:41,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33817 conditions, 4001 events. 2518/4001 cut-off events. For 406122/406126 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22004 event pairs, 716 based on Foata normal form. 5/3990 useless extension candidates. Maximal degree in co-relation 33738. Up to 3498 conditions per place. [2024-06-21 16:10:41,961 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 191 selfloop transitions, 21 changer transitions 0/259 dead transitions. [2024-06-21 16:10:41,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 259 transitions, 2944 flow [2024-06-21 16:10:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:41,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:41,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 16:10:41,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-21 16:10:41,962 INFO L175 Difference]: Start difference. First operand has 177 places, 233 transitions, 2402 flow. Second operand 7 states and 146 transitions. [2024-06-21 16:10:41,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 259 transitions, 2944 flow [2024-06-21 16:10:42,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 259 transitions, 2684 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:10:42,341 INFO L231 Difference]: Finished difference. Result has 175 places, 236 transitions, 2238 flow [2024-06-21 16:10:42,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2238, PETRI_PLACES=175, PETRI_TRANSITIONS=236} [2024-06-21 16:10:42,342 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 130 predicate places. [2024-06-21 16:10:42,342 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 236 transitions, 2238 flow [2024-06-21 16:10:42,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:42,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:42,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:42,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:10:42,342 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:42,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:42,342 INFO L85 PathProgramCache]: Analyzing trace with hash -726041869, now seen corresponding path program 1 times [2024-06-21 16:10:42,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:42,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849410640] [2024-06-21 16:10:42,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:42,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:43,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:43,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849410640] [2024-06-21 16:10:43,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849410640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:43,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:43,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:43,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224008253] [2024-06-21 16:10:43,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:43,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:43,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:43,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:10:43,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 236 transitions, 2238 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:43,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:43,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:10:43,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:44,750 INFO L124 PetriNetUnfolderBase]: 2694/4198 cut-off events. [2024-06-21 16:10:44,750 INFO L125 PetriNetUnfolderBase]: For 426266/426275 co-relation queries the response was YES. [2024-06-21 16:10:44,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35114 conditions, 4198 events. 2694/4198 cut-off events. For 426266/426275 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22583 event pairs, 715 based on Foata normal form. 10/4191 useless extension candidates. Maximal degree in co-relation 35034. Up to 3720 conditions per place. [2024-06-21 16:10:44,787 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 210 selfloop transitions, 40 changer transitions 0/275 dead transitions. [2024-06-21 16:10:44,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 275 transitions, 2921 flow [2024-06-21 16:10:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 16:10:44,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-21 16:10:44,789 INFO L175 Difference]: Start difference. First operand has 175 places, 236 transitions, 2238 flow. Second operand 9 states and 183 transitions. [2024-06-21 16:10:44,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 275 transitions, 2921 flow [2024-06-21 16:10:45,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 275 transitions, 2851 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:45,157 INFO L231 Difference]: Finished difference. Result has 180 places, 241 transitions, 2337 flow [2024-06-21 16:10:45,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2337, PETRI_PLACES=180, PETRI_TRANSITIONS=241} [2024-06-21 16:10:45,158 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 135 predicate places. [2024-06-21 16:10:45,158 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 241 transitions, 2337 flow [2024-06-21 16:10:45,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:45,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:45,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:45,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:10:45,158 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:45,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash 406751838, now seen corresponding path program 7 times [2024-06-21 16:10:45,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:45,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537657045] [2024-06-21 16:10:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:45,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:46,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:46,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537657045] [2024-06-21 16:10:46,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537657045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:46,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:46,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:10:46,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993902818] [2024-06-21 16:10:46,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:46,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:10:46,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:10:46,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:10:46,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:46,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 241 transitions, 2337 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) [2024-06-21 16:10:46,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:46,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:46,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:47,525 INFO L124 PetriNetUnfolderBase]: 2920/4488 cut-off events. [2024-06-21 16:10:47,525 INFO L125 PetriNetUnfolderBase]: For 448862/448865 co-relation queries the response was YES. [2024-06-21 16:10:47,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37661 conditions, 4488 events. 2920/4488 cut-off events. For 448862/448865 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 23793 event pairs, 699 based on Foata normal form. 4/4489 useless extension candidates. Maximal degree in co-relation 37579. Up to 3299 conditions per place. [2024-06-21 16:10:47,566 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 150 selfloop transitions, 136 changer transitions 0/291 dead transitions. [2024-06-21 16:10:47,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 291 transitions, 3585 flow [2024-06-21 16:10:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-21 16:10:47,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 16:10:47,568 INFO L175 Difference]: Start difference. First operand has 180 places, 241 transitions, 2337 flow. Second operand 10 states and 209 transitions. [2024-06-21 16:10:47,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 291 transitions, 3585 flow [2024-06-21 16:10:48,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 291 transitions, 3462 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:48,090 INFO L231 Difference]: Finished difference. Result has 184 places, 247 transitions, 2610 flow [2024-06-21 16:10:48,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2610, PETRI_PLACES=184, PETRI_TRANSITIONS=247} [2024-06-21 16:10:48,090 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 139 predicate places. [2024-06-21 16:10:48,090 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 247 transitions, 2610 flow [2024-06-21 16:10:48,090 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) [2024-06-21 16:10:48,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:48,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:48,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:10:48,090 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:48,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:48,091 INFO L85 PathProgramCache]: Analyzing trace with hash 465982502, now seen corresponding path program 8 times [2024-06-21 16:10:48,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:48,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360156228] [2024-06-21 16:10:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:48,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:49,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:49,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360156228] [2024-06-21 16:10:49,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360156228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:49,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:49,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:10:49,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915527036] [2024-06-21 16:10:49,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:49,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:10:49,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:10:49,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:10:49,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:49,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 247 transitions, 2610 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) [2024-06-21 16:10:49,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:49,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:49,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:50,503 INFO L124 PetriNetUnfolderBase]: 2942/4530 cut-off events. [2024-06-21 16:10:50,503 INFO L125 PetriNetUnfolderBase]: For 467355/467358 co-relation queries the response was YES. [2024-06-21 16:10:50,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38536 conditions, 4530 events. 2942/4530 cut-off events. For 467355/467358 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 24165 event pairs, 702 based on Foata normal form. 4/4531 useless extension candidates. Maximal degree in co-relation 38453. Up to 3318 conditions per place. [2024-06-21 16:10:50,545 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 157 selfloop transitions, 134 changer transitions 0/296 dead transitions. [2024-06-21 16:10:50,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 296 transitions, 3836 flow [2024-06-21 16:10:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 16:10:50,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-21 16:10:50,546 INFO L175 Difference]: Start difference. First operand has 184 places, 247 transitions, 2610 flow. Second operand 10 states and 211 transitions. [2024-06-21 16:10:50,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 296 transitions, 3836 flow [2024-06-21 16:10:51,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 296 transitions, 3614 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:51,096 INFO L231 Difference]: Finished difference. Result has 188 places, 250 transitions, 2728 flow [2024-06-21 16:10:51,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2728, PETRI_PLACES=188, PETRI_TRANSITIONS=250} [2024-06-21 16:10:51,097 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 143 predicate places. [2024-06-21 16:10:51,097 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 250 transitions, 2728 flow [2024-06-21 16:10:51,097 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) [2024-06-21 16:10:51,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:51,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:51,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:10:51,097 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:51,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:51,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1420029044, now seen corresponding path program 9 times [2024-06-21 16:10:51,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:51,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839925741] [2024-06-21 16:10:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:51,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:52,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:52,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839925741] [2024-06-21 16:10:52,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839925741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:52,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:52,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:10:52,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60175552] [2024-06-21 16:10:52,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:52,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:10:52,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:52,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:10:52,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:10:52,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:52,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 250 transitions, 2728 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) [2024-06-21 16:10:52,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:52,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:52,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:53,480 INFO L124 PetriNetUnfolderBase]: 2964/4562 cut-off events. [2024-06-21 16:10:53,480 INFO L125 PetriNetUnfolderBase]: For 484676/484679 co-relation queries the response was YES. [2024-06-21 16:10:53,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38998 conditions, 4562 events. 2964/4562 cut-off events. For 484676/484679 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 24333 event pairs, 692 based on Foata normal form. 4/4563 useless extension candidates. Maximal degree in co-relation 38914. Up to 3337 conditions per place. [2024-06-21 16:10:53,525 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 160 selfloop transitions, 134 changer transitions 0/299 dead transitions. [2024-06-21 16:10:53,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 299 transitions, 3965 flow [2024-06-21 16:10:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:53,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:53,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-21 16:10:53,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-21 16:10:53,526 INFO L175 Difference]: Start difference. First operand has 188 places, 250 transitions, 2728 flow. Second operand 10 states and 213 transitions. [2024-06-21 16:10:53,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 299 transitions, 3965 flow [2024-06-21 16:10:53,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 299 transitions, 3669 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 16:10:53,985 INFO L231 Difference]: Finished difference. Result has 191 places, 253 transitions, 2769 flow [2024-06-21 16:10:53,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2769, PETRI_PLACES=191, PETRI_TRANSITIONS=253} [2024-06-21 16:10:53,985 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 146 predicate places. [2024-06-21 16:10:53,985 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 253 transitions, 2769 flow [2024-06-21 16:10:53,986 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) [2024-06-21 16:10:53,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:53,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:53,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:10:53,986 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)] === [2024-06-21 16:10:53,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:53,987 INFO L85 PathProgramCache]: Analyzing trace with hash 399400188, now seen corresponding path program 10 times [2024-06-21 16:10:53,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:53,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569860032] [2024-06-21 16:10:53,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:53,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:55,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:55,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569860032] [2024-06-21 16:10:55,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569860032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:55,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:55,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:10:55,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043109122] [2024-06-21 16:10:55,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:55,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:10:55,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:55,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:10:55,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:10:55,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:10:55,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 253 transitions, 2769 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) [2024-06-21 16:10:55,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:55,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:10:55,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:56,377 INFO L124 PetriNetUnfolderBase]: 2954/4548 cut-off events. [2024-06-21 16:10:56,377 INFO L125 PetriNetUnfolderBase]: For 494834/494837 co-relation queries the response was YES. [2024-06-21 16:10:56,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38905 conditions, 4548 events. 2954/4548 cut-off events. For 494834/494837 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24266 event pairs, 685 based on Foata normal form. 4/4549 useless extension candidates. Maximal degree in co-relation 38820. Up to 3329 conditions per place. [2024-06-21 16:10:56,424 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 157 selfloop transitions, 135 changer transitions 0/297 dead transitions. [2024-06-21 16:10:56,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 297 transitions, 3727 flow [2024-06-21 16:10:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-21 16:10:56,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:10:56,425 INFO L175 Difference]: Start difference. First operand has 191 places, 253 transitions, 2769 flow. Second operand 10 states and 210 transitions. [2024-06-21 16:10:56,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 297 transitions, 3727 flow [2024-06-21 16:10:57,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 297 transitions, 3358 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 16:10:57,020 INFO L231 Difference]: Finished difference. Result has 193 places, 253 transitions, 2678 flow [2024-06-21 16:10:57,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2678, PETRI_PLACES=193, PETRI_TRANSITIONS=253} [2024-06-21 16:10:57,020 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 148 predicate places. [2024-06-21 16:10:57,021 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 253 transitions, 2678 flow [2024-06-21 16:10:57,021 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) [2024-06-21 16:10:57,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:57,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:57,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:10:57,021 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:57,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:57,022 INFO L85 PathProgramCache]: Analyzing trace with hash 608585956, now seen corresponding path program 2 times [2024-06-21 16:10:57,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:57,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438761896] [2024-06-21 16:10:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:57,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:57,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:57,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438761896] [2024-06-21 16:10:57,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438761896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:57,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:57,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:57,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398795756] [2024-06-21 16:10:57,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:57,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:57,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:57,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:57,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:58,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:10:58,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 253 transitions, 2678 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:58,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:58,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:10:58,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:58,730 INFO L124 PetriNetUnfolderBase]: 2593/4163 cut-off events. [2024-06-21 16:10:58,730 INFO L125 PetriNetUnfolderBase]: For 503315/503315 co-relation queries the response was YES. [2024-06-21 16:10:58,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36936 conditions, 4163 events. 2593/4163 cut-off events. For 503315/503315 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 23492 event pairs, 700 based on Foata normal form. 1/4141 useless extension candidates. Maximal degree in co-relation 36850. Up to 3609 conditions per place. [2024-06-21 16:10:58,774 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 200 selfloop transitions, 25 changer transitions 0/272 dead transitions. [2024-06-21 16:10:58,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 272 transitions, 3224 flow [2024-06-21 16:10:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 16:10:58,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-21 16:10:58,775 INFO L175 Difference]: Start difference. First operand has 193 places, 253 transitions, 2678 flow. Second operand 7 states and 142 transitions. [2024-06-21 16:10:58,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 272 transitions, 3224 flow [2024-06-21 16:10:59,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 272 transitions, 2926 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 16:10:59,308 INFO L231 Difference]: Finished difference. Result has 190 places, 256 transitions, 2488 flow [2024-06-21 16:10:59,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2488, PETRI_PLACES=190, PETRI_TRANSITIONS=256} [2024-06-21 16:10:59,309 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-21 16:10:59,309 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 256 transitions, 2488 flow [2024-06-21 16:10:59,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:59,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:59,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:59,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:10:59,310 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:59,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:59,310 INFO L85 PathProgramCache]: Analyzing trace with hash -986085199, now seen corresponding path program 1 times [2024-06-21 16:10:59,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:59,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551224926] [2024-06-21 16:10:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:59,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:00,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:00,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551224926] [2024-06-21 16:11:00,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551224926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:00,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:00,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:00,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067145284] [2024-06-21 16:11:00,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:00,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:00,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:00,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:00,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:00,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:11:00,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 256 transitions, 2488 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:00,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:00,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:11:00,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:01,064 INFO L124 PetriNetUnfolderBase]: 2418/3950 cut-off events. [2024-06-21 16:11:01,064 INFO L125 PetriNetUnfolderBase]: For 515576/515590 co-relation queries the response was YES. [2024-06-21 16:11:01,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35835 conditions, 3950 events. 2418/3950 cut-off events. For 515576/515590 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 22685 event pairs, 674 based on Foata normal form. 5/3912 useless extension candidates. Maximal degree in co-relation 35748. Up to 3317 conditions per place. [2024-06-21 16:11:01,107 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 192 selfloop transitions, 16 changer transitions 0/276 dead transitions. [2024-06-21 16:11:01,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 276 transitions, 3000 flow [2024-06-21 16:11:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:01,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 16:11:01,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-21 16:11:01,108 INFO L175 Difference]: Start difference. First operand has 190 places, 256 transitions, 2488 flow. Second operand 7 states and 146 transitions. [2024-06-21 16:11:01,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 276 transitions, 3000 flow [2024-06-21 16:11:01,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 276 transitions, 2914 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:01,577 INFO L231 Difference]: Finished difference. Result has 192 places, 259 transitions, 2486 flow [2024-06-21 16:11:01,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2486, PETRI_PLACES=192, PETRI_TRANSITIONS=259} [2024-06-21 16:11:01,578 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 147 predicate places. [2024-06-21 16:11:01,578 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 259 transitions, 2486 flow [2024-06-21 16:11:01,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:01,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:01,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:01,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:11:01,579 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:01,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:01,579 INFO L85 PathProgramCache]: Analyzing trace with hash -668883245, now seen corresponding path program 2 times [2024-06-21 16:11:01,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:01,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562572587] [2024-06-21 16:11:01,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:01,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:02,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:02,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562572587] [2024-06-21 16:11:02,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562572587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:02,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:02,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:11:02,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003962626] [2024-06-21 16:11:02,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:02,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:11:02,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:02,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:11:02,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:11:02,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:11:02,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 259 transitions, 2486 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:02,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:02,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:11:02,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:03,911 INFO L124 PetriNetUnfolderBase]: 2807/4402 cut-off events. [2024-06-21 16:11:03,912 INFO L125 PetriNetUnfolderBase]: For 539446/539463 co-relation queries the response was YES. [2024-06-21 16:11:03,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38813 conditions, 4402 events. 2807/4402 cut-off events. For 539446/539463 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24238 event pairs, 719 based on Foata normal form. 16/4398 useless extension candidates. Maximal degree in co-relation 38725. Up to 3887 conditions per place. [2024-06-21 16:11:03,960 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 229 selfloop transitions, 42 changer transitions 0/297 dead transitions. [2024-06-21 16:11:03,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 297 transitions, 3222 flow [2024-06-21 16:11:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 16:11:03,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:11:03,961 INFO L175 Difference]: Start difference. First operand has 192 places, 259 transitions, 2486 flow. Second operand 9 states and 180 transitions. [2024-06-21 16:11:03,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 297 transitions, 3222 flow [2024-06-21 16:11:04,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 297 transitions, 3160 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:04,556 INFO L231 Difference]: Finished difference. Result has 197 places, 264 transitions, 2606 flow [2024-06-21 16:11:04,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2606, PETRI_PLACES=197, PETRI_TRANSITIONS=264} [2024-06-21 16:11:04,556 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 152 predicate places. [2024-06-21 16:11:04,556 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 264 transitions, 2606 flow [2024-06-21 16:11:04,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:04,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:04,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:04,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:11:04,557 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:04,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:04,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1784290494, now seen corresponding path program 11 times [2024-06-21 16:11:04,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:04,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779539165] [2024-06-21 16:11:04,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:04,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:05,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:05,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779539165] [2024-06-21 16:11:05,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779539165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:05,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:05,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:05,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010591354] [2024-06-21 16:11:05,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:05,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:05,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:05,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:05,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:05,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:11:05,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 264 transitions, 2606 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) [2024-06-21 16:11:05,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:05,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:11:05,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:07,009 INFO L124 PetriNetUnfolderBase]: 3035/4690 cut-off events. [2024-06-21 16:11:07,009 INFO L125 PetriNetUnfolderBase]: For 566412/566412 co-relation queries the response was YES. [2024-06-21 16:11:07,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41544 conditions, 4690 events. 3035/4690 cut-off events. For 566412/566412 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25298 event pairs, 725 based on Foata normal form. 4/4679 useless extension candidates. Maximal degree in co-relation 41454. Up to 3416 conditions per place. [2024-06-21 16:11:07,064 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 167 selfloop transitions, 141 changer transitions 0/313 dead transitions. [2024-06-21 16:11:07,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 313 transitions, 3966 flow [2024-06-21 16:11:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-21 16:11:07,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 16:11:07,065 INFO L175 Difference]: Start difference. First operand has 197 places, 264 transitions, 2606 flow. Second operand 10 states and 209 transitions. [2024-06-21 16:11:07,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 313 transitions, 3966 flow [2024-06-21 16:11:07,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 313 transitions, 3831 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 16:11:07,676 INFO L231 Difference]: Finished difference. Result has 201 places, 270 transitions, 2883 flow [2024-06-21 16:11:07,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2883, PETRI_PLACES=201, PETRI_TRANSITIONS=270} [2024-06-21 16:11:07,677 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-21 16:11:07,678 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 270 transitions, 2883 flow [2024-06-21 16:11:07,678 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) [2024-06-21 16:11:07,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:07,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:07,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:11:07,679 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:07,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:07,679 INFO L85 PathProgramCache]: Analyzing trace with hash 950385482, now seen corresponding path program 12 times [2024-06-21 16:11:07,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:07,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125229009] [2024-06-21 16:11:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:07,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:08,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:08,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125229009] [2024-06-21 16:11:08,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125229009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:08,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:08,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:08,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884252919] [2024-06-21 16:11:08,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:08,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:08,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:08,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:08,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:08,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:11:08,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 270 transitions, 2883 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) [2024-06-21 16:11:08,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:08,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:11:08,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:10,156 INFO L124 PetriNetUnfolderBase]: 3057/4737 cut-off events. [2024-06-21 16:11:10,156 INFO L125 PetriNetUnfolderBase]: For 586451/586451 co-relation queries the response was YES. [2024-06-21 16:11:10,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42434 conditions, 4737 events. 3057/4737 cut-off events. For 586451/586451 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25699 event pairs, 711 based on Foata normal form. 4/4726 useless extension candidates. Maximal degree in co-relation 42343. Up to 3435 conditions per place. [2024-06-21 16:11:10,206 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 167 selfloop transitions, 145 changer transitions 0/317 dead transitions. [2024-06-21 16:11:10,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 317 transitions, 4210 flow [2024-06-21 16:11:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:10,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 16:11:10,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-21 16:11:10,207 INFO L175 Difference]: Start difference. First operand has 201 places, 270 transitions, 2883 flow. Second operand 10 states and 208 transitions. [2024-06-21 16:11:10,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 317 transitions, 4210 flow [2024-06-21 16:11:10,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 317 transitions, 3869 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:10,624 INFO L231 Difference]: Finished difference. Result has 204 places, 273 transitions, 2907 flow [2024-06-21 16:11:10,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2907, PETRI_PLACES=204, PETRI_TRANSITIONS=273} [2024-06-21 16:11:10,625 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-21 16:11:10,625 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 273 transitions, 2907 flow [2024-06-21 16:11:10,625 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) [2024-06-21 16:11:10,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:10,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:10,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:11:10,625 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:10,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:10,626 INFO L85 PathProgramCache]: Analyzing trace with hash -420721867, now seen corresponding path program 3 times [2024-06-21 16:11:10,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:10,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820671120] [2024-06-21 16:11:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:10,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:11,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:11,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820671120] [2024-06-21 16:11:11,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820671120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:11,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:11,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:11:11,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521116843] [2024-06-21 16:11:11,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:11,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:11:11,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:11,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:11:11,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:11:11,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:11:11,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 273 transitions, 2907 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:11,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:11,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:11:11,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:12,993 INFO L124 PetriNetUnfolderBase]: 2913/4586 cut-off events. [2024-06-21 16:11:12,993 INFO L125 PetriNetUnfolderBase]: For 603089/603104 co-relation queries the response was YES. [2024-06-21 16:11:13,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41798 conditions, 4586 events. 2913/4586 cut-off events. For 603089/603104 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 25552 event pairs, 736 based on Foata normal form. 14/4566 useless extension candidates. Maximal degree in co-relation 41706. Up to 4036 conditions per place. [2024-06-21 16:11:13,045 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 237 selfloop transitions, 47 changer transitions 0/310 dead transitions. [2024-06-21 16:11:13,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 310 transitions, 3678 flow [2024-06-21 16:11:13,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:13,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 16:11:13,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-21 16:11:13,047 INFO L175 Difference]: Start difference. First operand has 204 places, 273 transitions, 2907 flow. Second operand 9 states and 179 transitions. [2024-06-21 16:11:13,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 310 transitions, 3678 flow [2024-06-21 16:11:13,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 310 transitions, 3208 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 16:11:13,690 INFO L231 Difference]: Finished difference. Result has 205 places, 279 transitions, 2651 flow [2024-06-21 16:11:13,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2651, PETRI_PLACES=205, PETRI_TRANSITIONS=279} [2024-06-21 16:11:13,690 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 160 predicate places. [2024-06-21 16:11:13,690 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 279 transitions, 2651 flow [2024-06-21 16:11:13,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:13,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:13,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:13,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:11:13,691 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:13,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:13,691 INFO L85 PathProgramCache]: Analyzing trace with hash -95980747, now seen corresponding path program 4 times [2024-06-21 16:11:13,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:13,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867942066] [2024-06-21 16:11:13,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:13,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:14,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:14,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867942066] [2024-06-21 16:11:14,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867942066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:14,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:14,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:11:14,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938514864] [2024-06-21 16:11:14,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:14,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:11:14,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:14,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:11:14,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:11:15,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:11:15,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 279 transitions, 2651 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:15,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:15,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:11:15,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:16,396 INFO L124 PetriNetUnfolderBase]: 2930/4613 cut-off events. [2024-06-21 16:11:16,396 INFO L125 PetriNetUnfolderBase]: For 621317/621334 co-relation queries the response was YES. [2024-06-21 16:11:16,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42096 conditions, 4613 events. 2930/4613 cut-off events. For 621317/621334 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25758 event pairs, 748 based on Foata normal form. 16/4595 useless extension candidates. Maximal degree in co-relation 42002. Up to 4063 conditions per place. [2024-06-21 16:11:16,443 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 237 selfloop transitions, 51 changer transitions 0/314 dead transitions. [2024-06-21 16:11:16,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 314 transitions, 3416 flow [2024-06-21 16:11:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 16:11:16,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-21 16:11:16,444 INFO L175 Difference]: Start difference. First operand has 205 places, 279 transitions, 2651 flow. Second operand 9 states and 178 transitions. [2024-06-21 16:11:16,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 314 transitions, 3416 flow [2024-06-21 16:11:17,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 314 transitions, 3261 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 16:11:17,013 INFO L231 Difference]: Finished difference. Result has 208 places, 283 transitions, 2696 flow [2024-06-21 16:11:17,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2696, PETRI_PLACES=208, PETRI_TRANSITIONS=283} [2024-06-21 16:11:17,014 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 163 predicate places. [2024-06-21 16:11:17,014 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 283 transitions, 2696 flow [2024-06-21 16:11:17,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:17,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:17,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:17,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:11:17,015 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:17,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:17,015 INFO L85 PathProgramCache]: Analyzing trace with hash -676511942, now seen corresponding path program 13 times [2024-06-21 16:11:17,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:17,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328889316] [2024-06-21 16:11:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:17,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:18,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:18,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328889316] [2024-06-21 16:11:18,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328889316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:18,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:18,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:18,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410358808] [2024-06-21 16:11:18,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:18,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:18,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:18,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:18,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:18,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:11:18,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 283 transitions, 2696 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) [2024-06-21 16:11:18,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:18,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:11:18,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:19,798 INFO L124 PetriNetUnfolderBase]: 3124/4849 cut-off events. [2024-06-21 16:11:19,798 INFO L125 PetriNetUnfolderBase]: For 639654/639654 co-relation queries the response was YES. [2024-06-21 16:11:19,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43835 conditions, 4849 events. 3124/4849 cut-off events. For 639654/639654 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26500 event pairs, 701 based on Foata normal form. 4/4838 useless extension candidates. Maximal degree in co-relation 43740. Up to 3515 conditions per place. [2024-06-21 16:11:19,866 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 169 selfloop transitions, 155 changer transitions 0/329 dead transitions. [2024-06-21 16:11:19,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 329 transitions, 4055 flow [2024-06-21 16:11:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:19,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-21 16:11:19,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-21 16:11:19,868 INFO L175 Difference]: Start difference. First operand has 208 places, 283 transitions, 2696 flow. Second operand 10 states and 207 transitions. [2024-06-21 16:11:19,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 329 transitions, 4055 flow [2024-06-21 16:11:20,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 329 transitions, 3916 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:20,608 INFO L231 Difference]: Finished difference. Result has 213 places, 286 transitions, 2924 flow [2024-06-21 16:11:20,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2557, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2924, PETRI_PLACES=213, PETRI_TRANSITIONS=286} [2024-06-21 16:11:20,609 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-21 16:11:20,609 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 286 transitions, 2924 flow [2024-06-21 16:11:20,609 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) [2024-06-21 16:11:20,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:20,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:20,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:11:20,610 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:20,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:20,610 INFO L85 PathProgramCache]: Analyzing trace with hash -676517522, now seen corresponding path program 14 times [2024-06-21 16:11:20,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:20,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531678724] [2024-06-21 16:11:20,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:20,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:21,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:21,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531678724] [2024-06-21 16:11:21,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531678724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:21,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:21,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:21,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929629939] [2024-06-21 16:11:21,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:21,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:21,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:21,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:21,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:21,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:11:21,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 286 transitions, 2924 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) [2024-06-21 16:11:21,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:21,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:11:21,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:23,283 INFO L124 PetriNetUnfolderBase]: 3114/4835 cut-off events. [2024-06-21 16:11:23,283 INFO L125 PetriNetUnfolderBase]: For 650966/650966 co-relation queries the response was YES. [2024-06-21 16:11:23,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44191 conditions, 4835 events. 3114/4835 cut-off events. For 650966/650966 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26383 event pairs, 699 based on Foata normal form. 4/4824 useless extension candidates. Maximal degree in co-relation 44095. Up to 3507 conditions per place. [2024-06-21 16:11:23,332 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 164 selfloop transitions, 158 changer transitions 0/327 dead transitions. [2024-06-21 16:11:23,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 327 transitions, 3984 flow [2024-06-21 16:11:23,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:23,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 16:11:23,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-21 16:11:23,334 INFO L175 Difference]: Start difference. First operand has 213 places, 286 transitions, 2924 flow. Second operand 10 states and 204 transitions. [2024-06-21 16:11:23,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 327 transitions, 3984 flow [2024-06-21 16:11:24,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 327 transitions, 3546 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 16:11:24,010 INFO L231 Difference]: Finished difference. Result has 215 places, 286 transitions, 2810 flow [2024-06-21 16:11:24,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2810, PETRI_PLACES=215, PETRI_TRANSITIONS=286} [2024-06-21 16:11:24,011 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-21 16:11:24,011 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 286 transitions, 2810 flow [2024-06-21 16:11:24,011 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) [2024-06-21 16:11:24,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:24,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:24,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:11:24,011 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)] === [2024-06-21 16:11:24,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:24,011 INFO L85 PathProgramCache]: Analyzing trace with hash 638886075, now seen corresponding path program 5 times [2024-06-21 16:11:24,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:24,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110824142] [2024-06-21 16:11:24,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:24,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:25,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:25,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110824142] [2024-06-21 16:11:25,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110824142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:25,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:25,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:11:25,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662196703] [2024-06-21 16:11:25,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:25,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:11:25,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:25,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:11:25,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:11:25,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:11:25,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 286 transitions, 2810 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:25,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:25,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:11:25,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:26,438 INFO L124 PetriNetUnfolderBase]: 2934/4624 cut-off events. [2024-06-21 16:11:26,439 INFO L125 PetriNetUnfolderBase]: For 660287/660304 co-relation queries the response was YES. [2024-06-21 16:11:26,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42731 conditions, 4624 events. 2934/4624 cut-off events. For 660287/660304 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25894 event pairs, 696 based on Foata normal form. 16/4613 useless extension candidates. Maximal degree in co-relation 42634. Up to 3974 conditions per place. [2024-06-21 16:11:26,489 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 234 selfloop transitions, 60 changer transitions 0/320 dead transitions. [2024-06-21 16:11:26,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 320 transitions, 3570 flow [2024-06-21 16:11:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 16:11:26,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-21 16:11:26,490 INFO L175 Difference]: Start difference. First operand has 215 places, 286 transitions, 2810 flow. Second operand 9 states and 179 transitions. [2024-06-21 16:11:26,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 320 transitions, 3570 flow [2024-06-21 16:11:27,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 320 transitions, 3260 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 16:11:27,061 INFO L231 Difference]: Finished difference. Result has 216 places, 288 transitions, 2699 flow [2024-06-21 16:11:27,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2699, PETRI_PLACES=216, PETRI_TRANSITIONS=288} [2024-06-21 16:11:27,061 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-21 16:11:27,062 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 288 transitions, 2699 flow [2024-06-21 16:11:27,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:27,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:27,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:27,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:11:27,062 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:27,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:27,063 INFO L85 PathProgramCache]: Analyzing trace with hash -420998914, now seen corresponding path program 15 times [2024-06-21 16:11:27,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:27,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327065379] [2024-06-21 16:11:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:27,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:28,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:28,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327065379] [2024-06-21 16:11:28,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327065379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:28,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:28,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:28,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678224638] [2024-06-21 16:11:28,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:28,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:28,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:28,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:28,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:11:28,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 288 transitions, 2699 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) [2024-06-21 16:11:28,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:28,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:11:28,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:29,529 INFO L124 PetriNetUnfolderBase]: 3096/4809 cut-off events. [2024-06-21 16:11:29,530 INFO L125 PetriNetUnfolderBase]: For 670200/670200 co-relation queries the response was YES. [2024-06-21 16:11:29,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43549 conditions, 4809 events. 3096/4809 cut-off events. For 670200/670200 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26231 event pairs, 724 based on Foata normal form. 4/4798 useless extension candidates. Maximal degree in co-relation 43451. Up to 3487 conditions per place. [2024-06-21 16:11:29,583 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 153 selfloop transitions, 166 changer transitions 0/324 dead transitions. [2024-06-21 16:11:29,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 324 transitions, 3477 flow [2024-06-21 16:11:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 16:11:29,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:11:29,584 INFO L175 Difference]: Start difference. First operand has 216 places, 288 transitions, 2699 flow. Second operand 10 states and 200 transitions. [2024-06-21 16:11:29,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 324 transitions, 3477 flow [2024-06-21 16:11:30,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 324 transitions, 3266 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:30,262 INFO L231 Difference]: Finished difference. Result has 219 places, 288 transitions, 2828 flow [2024-06-21 16:11:30,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2828, PETRI_PLACES=219, PETRI_TRANSITIONS=288} [2024-06-21 16:11:30,262 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-21 16:11:30,262 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 288 transitions, 2828 flow [2024-06-21 16:11:30,263 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) [2024-06-21 16:11:30,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:30,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:30,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:11:30,263 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)] === [2024-06-21 16:11:30,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash 621531091, now seen corresponding path program 2 times [2024-06-21 16:11:30,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:30,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454342601] [2024-06-21 16:11:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:30,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:31,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:31,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454342601] [2024-06-21 16:11:31,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454342601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:31,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:31,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:31,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453093042] [2024-06-21 16:11:31,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:31,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:31,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:31,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:31,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:31,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:11:31,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 288 transitions, 2828 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:31,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:31,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:11:31,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:32,243 INFO L124 PetriNetUnfolderBase]: 2522/4120 cut-off events. [2024-06-21 16:11:32,243 INFO L125 PetriNetUnfolderBase]: For 680271/680313 co-relation queries the response was YES. [2024-06-21 16:11:32,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40383 conditions, 4120 events. 2522/4120 cut-off events. For 680271/680313 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 23799 event pairs, 670 based on Foata normal form. 13/4056 useless extension candidates. Maximal degree in co-relation 40284. Up to 3474 conditions per place. [2024-06-21 16:11:32,291 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 214 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2024-06-21 16:11:32,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 303 transitions, 3392 flow [2024-06-21 16:11:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:32,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 16:11:32,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-21 16:11:32,292 INFO L175 Difference]: Start difference. First operand has 219 places, 288 transitions, 2828 flow. Second operand 7 states and 142 transitions. [2024-06-21 16:11:32,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 303 transitions, 3392 flow [2024-06-21 16:11:33,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 303 transitions, 2952 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 16:11:33,013 INFO L231 Difference]: Finished difference. Result has 214 places, 291 transitions, 2496 flow [2024-06-21 16:11:33,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2496, PETRI_PLACES=214, PETRI_TRANSITIONS=291} [2024-06-21 16:11:33,013 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-21 16:11:33,014 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 291 transitions, 2496 flow [2024-06-21 16:11:33,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:33,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:33,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:33,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:11:33,014 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)] === [2024-06-21 16:11:33,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:33,015 INFO L85 PathProgramCache]: Analyzing trace with hash -633643056, now seen corresponding path program 3 times [2024-06-21 16:11:33,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:33,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96367574] [2024-06-21 16:11:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:33,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:34,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:34,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96367574] [2024-06-21 16:11:34,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96367574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:34,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:34,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:34,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963410673] [2024-06-21 16:11:34,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:34,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:34,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:34,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:34,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:34,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:11:34,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 291 transitions, 2496 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:34,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:34,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:11:34,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:34,910 INFO L124 PetriNetUnfolderBase]: 2694/4358 cut-off events. [2024-06-21 16:11:34,910 INFO L125 PetriNetUnfolderBase]: For 692478/692487 co-relation queries the response was YES. [2024-06-21 16:11:34,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41400 conditions, 4358 events. 2694/4358 cut-off events. For 692478/692487 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25035 event pairs, 695 based on Foata normal form. 7/4319 useless extension candidates. Maximal degree in co-relation 41300. Up to 3766 conditions per place. [2024-06-21 16:11:34,961 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 226 selfloop transitions, 32 changer transitions 0/305 dead transitions. [2024-06-21 16:11:34,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 305 transitions, 3102 flow [2024-06-21 16:11:34,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 16:11:34,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 16:11:34,962 INFO L175 Difference]: Start difference. First operand has 214 places, 291 transitions, 2496 flow. Second operand 7 states and 138 transitions. [2024-06-21 16:11:34,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 305 transitions, 3102 flow [2024-06-21 16:11:35,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 305 transitions, 3016 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:35,676 INFO L231 Difference]: Finished difference. Result has 216 places, 294 transitions, 2542 flow [2024-06-21 16:11:35,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2542, PETRI_PLACES=216, PETRI_TRANSITIONS=294} [2024-06-21 16:11:35,677 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-21 16:11:35,677 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 294 transitions, 2542 flow [2024-06-21 16:11:35,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:35,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:35,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:35,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:11:35,677 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)] === [2024-06-21 16:11:35,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:35,678 INFO L85 PathProgramCache]: Analyzing trace with hash -633137601, now seen corresponding path program 3 times [2024-06-21 16:11:35,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:35,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131402871] [2024-06-21 16:11:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:35,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:36,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:36,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131402871] [2024-06-21 16:11:36,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131402871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:36,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:36,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:36,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052481911] [2024-06-21 16:11:36,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:36,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:36,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:36,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:36,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:36,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:11:36,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 294 transitions, 2542 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:36,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:36,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:11:36,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:37,780 INFO L124 PetriNetUnfolderBase]: 2516/4122 cut-off events. [2024-06-21 16:11:37,780 INFO L125 PetriNetUnfolderBase]: For 707750/707787 co-relation queries the response was YES. [2024-06-21 16:11:37,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40562 conditions, 4122 events. 2516/4122 cut-off events. For 707750/707787 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23955 event pairs, 670 based on Foata normal form. 13/4067 useless extension candidates. Maximal degree in co-relation 40461. Up to 3458 conditions per place. [2024-06-21 16:11:37,833 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 214 selfloop transitions, 29 changer transitions 0/312 dead transitions. [2024-06-21 16:11:37,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 312 transitions, 3144 flow [2024-06-21 16:11:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:37,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:37,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 16:11:37,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 16:11:37,834 INFO L175 Difference]: Start difference. First operand has 216 places, 294 transitions, 2542 flow. Second operand 7 states and 143 transitions. [2024-06-21 16:11:37,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 312 transitions, 3144 flow [2024-06-21 16:11:38,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 312 transitions, 3034 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:38,442 INFO L231 Difference]: Finished difference. Result has 219 places, 300 transitions, 2594 flow [2024-06-21 16:11:38,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2594, PETRI_PLACES=219, PETRI_TRANSITIONS=300} [2024-06-21 16:11:38,442 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-21 16:11:38,443 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 300 transitions, 2594 flow [2024-06-21 16:11:38,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:38,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:38,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:38,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:11:38,443 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)] === [2024-06-21 16:11:38,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:38,443 INFO L85 PathProgramCache]: Analyzing trace with hash -840199962, now seen corresponding path program 1 times [2024-06-21 16:11:38,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:38,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354595560] [2024-06-21 16:11:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:38,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:39,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:39,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354595560] [2024-06-21 16:11:39,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354595560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:39,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:39,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:39,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846104600] [2024-06-21 16:11:39,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:39,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:39,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:39,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:39,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:39,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:11:39,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 300 transitions, 2594 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:39,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:39,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:11:39,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:40,173 INFO L124 PetriNetUnfolderBase]: 2766/4455 cut-off events. [2024-06-21 16:11:40,173 INFO L125 PetriNetUnfolderBase]: For 733597/733603 co-relation queries the response was YES. [2024-06-21 16:11:40,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42783 conditions, 4455 events. 2766/4455 cut-off events. For 733597/733603 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25497 event pairs, 686 based on Foata normal form. 4/4434 useless extension candidates. Maximal degree in co-relation 42680. Up to 3921 conditions per place. [2024-06-21 16:11:40,222 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 274 selfloop transitions, 14 changer transitions 0/320 dead transitions. [2024-06-21 16:11:40,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 320 transitions, 3278 flow [2024-06-21 16:11:40,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 16:11:40,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-21 16:11:40,223 INFO L175 Difference]: Start difference. First operand has 219 places, 300 transitions, 2594 flow. Second operand 7 states and 141 transitions. [2024-06-21 16:11:40,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 320 transitions, 3278 flow [2024-06-21 16:11:41,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 320 transitions, 3201 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 16:11:41,190 INFO L231 Difference]: Finished difference. Result has 223 places, 303 transitions, 2607 flow [2024-06-21 16:11:41,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2607, PETRI_PLACES=223, PETRI_TRANSITIONS=303} [2024-06-21 16:11:41,190 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-21 16:11:41,190 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 303 transitions, 2607 flow [2024-06-21 16:11:41,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:41,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:41,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:41,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:11:41,191 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)] === [2024-06-21 16:11:41,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:41,191 INFO L85 PathProgramCache]: Analyzing trace with hash -840050232, now seen corresponding path program 2 times [2024-06-21 16:11:41,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:41,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520166899] [2024-06-21 16:11:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:41,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:42,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:42,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520166899] [2024-06-21 16:11:42,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520166899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:42,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:42,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:42,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143441082] [2024-06-21 16:11:42,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:42,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:42,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:42,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:11:42,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 303 transitions, 2607 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:42,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:42,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:11:42,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:43,000 INFO L124 PetriNetUnfolderBase]: 2776/4471 cut-off events. [2024-06-21 16:11:43,000 INFO L125 PetriNetUnfolderBase]: For 751317/751323 co-relation queries the response was YES. [2024-06-21 16:11:43,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43487 conditions, 4471 events. 2776/4471 cut-off events. For 751317/751323 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25631 event pairs, 686 based on Foata normal form. 4/4450 useless extension candidates. Maximal degree in co-relation 43382. Up to 3926 conditions per place. [2024-06-21 16:11:43,053 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 270 selfloop transitions, 19 changer transitions 0/321 dead transitions. [2024-06-21 16:11:43,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 321 transitions, 3299 flow [2024-06-21 16:11:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 16:11:43,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-21 16:11:43,054 INFO L175 Difference]: Start difference. First operand has 223 places, 303 transitions, 2607 flow. Second operand 7 states and 141 transitions. [2024-06-21 16:11:43,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 321 transitions, 3299 flow [2024-06-21 16:11:43,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 321 transitions, 3231 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:43,811 INFO L231 Difference]: Finished difference. Result has 225 places, 306 transitions, 2645 flow [2024-06-21 16:11:43,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2539, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2645, PETRI_PLACES=225, PETRI_TRANSITIONS=306} [2024-06-21 16:11:43,812 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-21 16:11:43,812 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 306 transitions, 2645 flow [2024-06-21 16:11:43,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:43,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:43,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:43,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:11:43,812 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)] === [2024-06-21 16:11:43,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1151694655, now seen corresponding path program 1 times [2024-06-21 16:11:43,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:43,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756619296] [2024-06-21 16:11:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:43,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:44,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:44,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756619296] [2024-06-21 16:11:44,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756619296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:44,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:44,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:44,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815096517] [2024-06-21 16:11:44,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:44,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:44,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:44,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:44,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:11:44,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 306 transitions, 2645 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:44,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:44,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:11:44,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:45,729 INFO L124 PetriNetUnfolderBase]: 2791/4492 cut-off events. [2024-06-21 16:11:45,729 INFO L125 PetriNetUnfolderBase]: For 772933/772939 co-relation queries the response was YES. [2024-06-21 16:11:45,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44172 conditions, 4492 events. 2791/4492 cut-off events. For 772933/772939 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25731 event pairs, 686 based on Foata normal form. 5/4472 useless extension candidates. Maximal degree in co-relation 44066. Up to 3960 conditions per place. [2024-06-21 16:11:45,781 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 277 selfloop transitions, 14 changer transitions 0/323 dead transitions. [2024-06-21 16:11:45,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 323 transitions, 3311 flow [2024-06-21 16:11:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:45,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 16:11:45,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 16:11:45,782 INFO L175 Difference]: Start difference. First operand has 225 places, 306 transitions, 2645 flow. Second operand 7 states and 138 transitions. [2024-06-21 16:11:45,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 323 transitions, 3311 flow [2024-06-21 16:11:46,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 323 transitions, 3227 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:46,597 INFO L231 Difference]: Finished difference. Result has 227 places, 309 transitions, 2645 flow [2024-06-21 16:11:46,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2561, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2645, PETRI_PLACES=227, PETRI_TRANSITIONS=309} [2024-06-21 16:11:46,597 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-21 16:11:46,597 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 309 transitions, 2645 flow [2024-06-21 16:11:46,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:46,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:46,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:46,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:11:46,598 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)] === [2024-06-21 16:11:46,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:46,598 INFO L85 PathProgramCache]: Analyzing trace with hash -633129665, now seen corresponding path program 2 times [2024-06-21 16:11:46,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:46,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062513229] [2024-06-21 16:11:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:46,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:48,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:48,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062513229] [2024-06-21 16:11:48,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062513229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:48,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:48,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:48,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209250667] [2024-06-21 16:11:48,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:48,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:48,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:48,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:48,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:48,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:11:48,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 309 transitions, 2645 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:48,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:48,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:11:48,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:49,121 INFO L124 PetriNetUnfolderBase]: 2796/4502 cut-off events. [2024-06-21 16:11:49,121 INFO L125 PetriNetUnfolderBase]: For 787099/787108 co-relation queries the response was YES. [2024-06-21 16:11:49,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44736 conditions, 4502 events. 2796/4502 cut-off events. For 787099/787108 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25811 event pairs, 688 based on Foata normal form. 6/4482 useless extension candidates. Maximal degree in co-relation 44629. Up to 3950 conditions per place. [2024-06-21 16:11:49,173 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 271 selfloop transitions, 27 changer transitions 0/330 dead transitions. [2024-06-21 16:11:49,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 330 transitions, 3573 flow [2024-06-21 16:11:49,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:49,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 16:11:49,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 16:11:49,175 INFO L175 Difference]: Start difference. First operand has 227 places, 309 transitions, 2645 flow. Second operand 7 states and 138 transitions. [2024-06-21 16:11:49,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 330 transitions, 3573 flow [2024-06-21 16:11:49,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 330 transitions, 3473 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:49,788 INFO L231 Difference]: Finished difference. Result has 230 places, 319 transitions, 2782 flow [2024-06-21 16:11:49,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2782, PETRI_PLACES=230, PETRI_TRANSITIONS=319} [2024-06-21 16:11:49,788 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-21 16:11:49,788 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 319 transitions, 2782 flow [2024-06-21 16:11:49,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:49,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:49,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:49,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:11:49,789 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)] === [2024-06-21 16:11:49,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:49,790 INFO L85 PathProgramCache]: Analyzing trace with hash -636964668, now seen corresponding path program 3 times [2024-06-21 16:11:49,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:49,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593487208] [2024-06-21 16:11:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:49,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:50,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:50,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593487208] [2024-06-21 16:11:50,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593487208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:50,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:50,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:50,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952988197] [2024-06-21 16:11:50,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:50,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:50,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:50,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:50,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:50,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:11:50,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 319 transitions, 2782 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:50,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:50,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:11:50,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:51,651 INFO L124 PetriNetUnfolderBase]: 2798/4507 cut-off events. [2024-06-21 16:11:51,651 INFO L125 PetriNetUnfolderBase]: For 805227/805236 co-relation queries the response was YES. [2024-06-21 16:11:51,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45284 conditions, 4507 events. 2798/4507 cut-off events. For 805227/805236 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25869 event pairs, 692 based on Foata normal form. 4/4485 useless extension candidates. Maximal degree in co-relation 45175. Up to 3943 conditions per place. [2024-06-21 16:11:51,704 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 276 selfloop transitions, 26 changer transitions 0/334 dead transitions. [2024-06-21 16:11:51,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 334 transitions, 3500 flow [2024-06-21 16:11:51,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 16:11:51,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:11:51,705 INFO L175 Difference]: Start difference. First operand has 230 places, 319 transitions, 2782 flow. Second operand 7 states and 140 transitions. [2024-06-21 16:11:51,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 334 transitions, 3500 flow [2024-06-21 16:11:52,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 334 transitions, 3434 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 16:11:52,503 INFO L231 Difference]: Finished difference. Result has 234 places, 322 transitions, 2846 flow [2024-06-21 16:11:52,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2846, PETRI_PLACES=234, PETRI_TRANSITIONS=322} [2024-06-21 16:11:52,503 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-21 16:11:52,503 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 322 transitions, 2846 flow [2024-06-21 16:11:52,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:52,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:52,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:52,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:11:52,504 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)] === [2024-06-21 16:11:52,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:52,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1146130465, now seen corresponding path program 3 times [2024-06-21 16:11:52,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:52,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812689102] [2024-06-21 16:11:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:52,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:53,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:53,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812689102] [2024-06-21 16:11:53,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812689102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:53,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:53,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:53,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857418046] [2024-06-21 16:11:53,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:53,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:53,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:53,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:53,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:53,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:11:53,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 322 transitions, 2846 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:53,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:53,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:11:53,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:54,575 INFO L124 PetriNetUnfolderBase]: 2797/4506 cut-off events. [2024-06-21 16:11:54,575 INFO L125 PetriNetUnfolderBase]: For 820747/820756 co-relation queries the response was YES. [2024-06-21 16:11:54,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45689 conditions, 4506 events. 2797/4506 cut-off events. For 820747/820756 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25934 event pairs, 687 based on Foata normal form. 7/4487 useless extension candidates. Maximal degree in co-relation 45578. Up to 3964 conditions per place. [2024-06-21 16:11:54,629 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 283 selfloop transitions, 21 changer transitions 0/336 dead transitions. [2024-06-21 16:11:54,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 336 transitions, 3543 flow [2024-06-21 16:11:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 16:11:54,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-21 16:11:54,630 INFO L175 Difference]: Start difference. First operand has 234 places, 322 transitions, 2846 flow. Second operand 7 states and 137 transitions. [2024-06-21 16:11:54,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 336 transitions, 3543 flow [2024-06-21 16:11:55,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 336 transitions, 3409 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:55,631 INFO L231 Difference]: Finished difference. Result has 236 places, 325 transitions, 2824 flow [2024-06-21 16:11:55,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2712, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2824, PETRI_PLACES=236, PETRI_TRANSITIONS=325} [2024-06-21 16:11:55,632 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 191 predicate places. [2024-06-21 16:11:55,632 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 325 transitions, 2824 flow [2024-06-21 16:11:55,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:55,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:55,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:55,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:11:55,632 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:55,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash 493054189, now seen corresponding path program 1 times [2024-06-21 16:11:55,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:55,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161415089] [2024-06-21 16:11:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:55,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:56,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:56,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161415089] [2024-06-21 16:11:56,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161415089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:56,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:56,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:56,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68593348] [2024-06-21 16:11:56,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:56,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:56,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:56,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:56,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:11:56,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 325 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) [2024-06-21 16:11:56,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:56,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:11:56,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:58,240 INFO L124 PetriNetUnfolderBase]: 3183/4941 cut-off events. [2024-06-21 16:11:58,240 INFO L125 PetriNetUnfolderBase]: For 852817/852821 co-relation queries the response was YES. [2024-06-21 16:11:58,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49371 conditions, 4941 events. 3183/4941 cut-off events. For 852817/852821 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 27111 event pairs, 565 based on Foata normal form. 8/4947 useless extension candidates. Maximal degree in co-relation 49259. Up to 4508 conditions per place. [2024-06-21 16:11:58,300 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 343 selfloop transitions, 33 changer transitions 0/381 dead transitions. [2024-06-21 16:11:58,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 381 transitions, 4164 flow [2024-06-21 16:11:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:11:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:11:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-21 16:11:58,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-21 16:11:58,301 INFO L175 Difference]: Start difference. First operand has 236 places, 325 transitions, 2824 flow. Second operand 11 states and 215 transitions. [2024-06-21 16:11:58,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 381 transitions, 4164 flow [2024-06-21 16:11:59,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 381 transitions, 4076 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:59,191 INFO L231 Difference]: Finished difference. Result has 242 places, 329 transitions, 2957 flow [2024-06-21 16:11:59,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2957, PETRI_PLACES=242, PETRI_TRANSITIONS=329} [2024-06-21 16:11:59,191 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 197 predicate places. [2024-06-21 16:11:59,192 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 329 transitions, 2957 flow [2024-06-21 16:11:59,192 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) [2024-06-21 16:11:59,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:59,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:59,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:11:59,192 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:59,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash 956337233, now seen corresponding path program 2 times [2024-06-21 16:11:59,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:59,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343991366] [2024-06-21 16:11:59,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:59,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:00,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:00,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343991366] [2024-06-21 16:12:00,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343991366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:00,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:00,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:00,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301381388] [2024-06-21 16:12:00,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:00,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:00,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:00,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:00,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:00,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:12:00,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 329 transitions, 2957 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) [2024-06-21 16:12:00,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:00,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:12:00,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:02,015 INFO L124 PetriNetUnfolderBase]: 3175/4929 cut-off events. [2024-06-21 16:12:02,015 INFO L125 PetriNetUnfolderBase]: For 865297/865301 co-relation queries the response was YES. [2024-06-21 16:12:02,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49502 conditions, 4929 events. 3175/4929 cut-off events. For 865297/865301 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 27072 event pairs, 704 based on Foata normal form. 8/4935 useless extension candidates. Maximal degree in co-relation 49389. Up to 4555 conditions per place. [2024-06-21 16:12:02,073 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 340 selfloop transitions, 29 changer transitions 0/374 dead transitions. [2024-06-21 16:12:02,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 374 transitions, 3841 flow [2024-06-21 16:12:02,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 16:12:02,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 16:12:02,074 INFO L175 Difference]: Start difference. First operand has 242 places, 329 transitions, 2957 flow. Second operand 10 states and 195 transitions. [2024-06-21 16:12:02,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 374 transitions, 3841 flow [2024-06-21 16:12:02,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 374 transitions, 3671 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-21 16:12:02,946 INFO L231 Difference]: Finished difference. Result has 245 places, 329 transitions, 2852 flow [2024-06-21 16:12:02,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2852, PETRI_PLACES=245, PETRI_TRANSITIONS=329} [2024-06-21 16:12:02,947 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 200 predicate places. [2024-06-21 16:12:02,947 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 329 transitions, 2852 flow [2024-06-21 16:12:02,947 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) [2024-06-21 16:12:02,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:02,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:02,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:12:02,947 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:02,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:02,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1071628403, now seen corresponding path program 3 times [2024-06-21 16:12:02,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:02,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931214286] [2024-06-21 16:12:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:02,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:04,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:04,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931214286] [2024-06-21 16:12:04,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931214286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:04,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:04,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:04,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064240054] [2024-06-21 16:12:04,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:04,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:04,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:04,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:04,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:04,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:12:04,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 329 transitions, 2852 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) [2024-06-21 16:12:04,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:04,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:12:04,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:05,475 INFO L124 PetriNetUnfolderBase]: 3192/4958 cut-off events. [2024-06-21 16:12:05,475 INFO L125 PetriNetUnfolderBase]: For 889333/889340 co-relation queries the response was YES. [2024-06-21 16:12:05,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49754 conditions, 4958 events. 3192/4958 cut-off events. For 889333/889340 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 27289 event pairs, 714 based on Foata normal form. 10/4965 useless extension candidates. Maximal degree in co-relation 49639. Up to 4385 conditions per place. [2024-06-21 16:12:05,534 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 280 selfloop transitions, 87 changer transitions 0/372 dead transitions. [2024-06-21 16:12:05,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 372 transitions, 3792 flow [2024-06-21 16:12:05,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:05,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 16:12:05,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 16:12:05,536 INFO L175 Difference]: Start difference. First operand has 245 places, 329 transitions, 2852 flow. Second operand 10 states and 198 transitions. [2024-06-21 16:12:05,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 372 transitions, 3792 flow [2024-06-21 16:12:06,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 372 transitions, 3729 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 16:12:06,244 INFO L231 Difference]: Finished difference. Result has 246 places, 331 transitions, 3050 flow [2024-06-21 16:12:06,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3050, PETRI_PLACES=246, PETRI_TRANSITIONS=331} [2024-06-21 16:12:06,245 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-21 16:12:06,245 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 331 transitions, 3050 flow [2024-06-21 16:12:06,245 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) [2024-06-21 16:12:06,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:06,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:06,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:12:06,245 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)] === [2024-06-21 16:12:06,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:06,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1374791459, now seen corresponding path program 1 times [2024-06-21 16:12:06,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:06,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079451666] [2024-06-21 16:12:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:06,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:07,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079451666] [2024-06-21 16:12:07,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079451666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:07,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:07,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:07,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479492493] [2024-06-21 16:12:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:07,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:07,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:07,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:07,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:07,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:12:07,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 331 transitions, 3050 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:07,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:07,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:12:07,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:08,199 INFO L124 PetriNetUnfolderBase]: 2809/4528 cut-off events. [2024-06-21 16:12:08,199 INFO L125 PetriNetUnfolderBase]: For 901306/901316 co-relation queries the response was YES. [2024-06-21 16:12:08,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47930 conditions, 4528 events. 2809/4528 cut-off events. For 901306/901316 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 26121 event pairs, 657 based on Foata normal form. 6/4496 useless extension candidates. Maximal degree in co-relation 47814. Up to 3861 conditions per place. [2024-06-21 16:12:08,255 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 283 selfloop transitions, 26 changer transitions 0/364 dead transitions. [2024-06-21 16:12:08,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 364 transitions, 3836 flow [2024-06-21 16:12:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:12:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:12:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 16:12:08,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:12:08,256 INFO L175 Difference]: Start difference. First operand has 246 places, 331 transitions, 3050 flow. Second operand 8 states and 168 transitions. [2024-06-21 16:12:08,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 364 transitions, 3836 flow [2024-06-21 16:12:09,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 364 transitions, 3593 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-21 16:12:09,307 INFO L231 Difference]: Finished difference. Result has 246 places, 334 transitions, 2940 flow [2024-06-21 16:12:09,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2940, PETRI_PLACES=246, PETRI_TRANSITIONS=334} [2024-06-21 16:12:09,308 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-21 16:12:09,308 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 334 transitions, 2940 flow [2024-06-21 16:12:09,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:09,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:09,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:09,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:12:09,309 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:09,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1237267537, now seen corresponding path program 4 times [2024-06-21 16:12:09,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:09,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450363336] [2024-06-21 16:12:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:09,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:10,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:10,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450363336] [2024-06-21 16:12:10,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450363336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:10,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:10,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:10,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087402483] [2024-06-21 16:12:10,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:10,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:10,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:10,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:10,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:12:10,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 334 transitions, 2940 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) [2024-06-21 16:12:10,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:10,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:12:10,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:11,888 INFO L124 PetriNetUnfolderBase]: 3219/5000 cut-off events. [2024-06-21 16:12:11,889 INFO L125 PetriNetUnfolderBase]: For 933725/933732 co-relation queries the response was YES. [2024-06-21 16:12:11,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51017 conditions, 5000 events. 3219/5000 cut-off events. For 933725/933732 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 27561 event pairs, 709 based on Foata normal form. 10/5007 useless extension candidates. Maximal degree in co-relation 50900. Up to 4426 conditions per place. [2024-06-21 16:12:11,948 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 291 selfloop transitions, 80 changer transitions 0/376 dead transitions. [2024-06-21 16:12:11,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 376 transitions, 3892 flow [2024-06-21 16:12:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 16:12:11,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-21 16:12:11,949 INFO L175 Difference]: Start difference. First operand has 246 places, 334 transitions, 2940 flow. Second operand 10 states and 196 transitions. [2024-06-21 16:12:11,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 376 transitions, 3892 flow [2024-06-21 16:12:12,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 376 transitions, 3783 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:12,685 INFO L231 Difference]: Finished difference. Result has 250 places, 336 transitions, 3082 flow [2024-06-21 16:12:12,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3082, PETRI_PLACES=250, PETRI_TRANSITIONS=336} [2024-06-21 16:12:12,685 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-21 16:12:12,685 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 336 transitions, 3082 flow [2024-06-21 16:12:12,686 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) [2024-06-21 16:12:12,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:12,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:12,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:12:12,686 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:12,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:12,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1243947665, now seen corresponding path program 1 times [2024-06-21 16:12:12,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:12,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049896836] [2024-06-21 16:12:12,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:12,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:14,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:14,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049896836] [2024-06-21 16:12:14,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049896836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:14,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:14,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:14,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741154520] [2024-06-21 16:12:14,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:14,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:14,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:14,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:14,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:14,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:12:14,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 336 transitions, 3082 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) [2024-06-21 16:12:14,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:14,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:12:14,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:15,578 INFO L124 PetriNetUnfolderBase]: 3236/5027 cut-off events. [2024-06-21 16:12:15,578 INFO L125 PetriNetUnfolderBase]: For 961375/961382 co-relation queries the response was YES. [2024-06-21 16:12:15,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51788 conditions, 5027 events. 3236/5027 cut-off events. For 961375/961382 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 27744 event pairs, 660 based on Foata normal form. 8/5032 useless extension candidates. Maximal degree in co-relation 51670. Up to 4359 conditions per place. [2024-06-21 16:12:15,640 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 283 selfloop transitions, 93 changer transitions 0/381 dead transitions. [2024-06-21 16:12:15,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 381 transitions, 4062 flow [2024-06-21 16:12:15,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 16:12:15,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 16:12:15,641 INFO L175 Difference]: Start difference. First operand has 250 places, 336 transitions, 3082 flow. Second operand 10 states and 198 transitions. [2024-06-21 16:12:15,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 381 transitions, 4062 flow [2024-06-21 16:12:16,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 381 transitions, 3829 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 16:12:16,888 INFO L231 Difference]: Finished difference. Result has 253 places, 341 transitions, 3146 flow [2024-06-21 16:12:16,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3146, PETRI_PLACES=253, PETRI_TRANSITIONS=341} [2024-06-21 16:12:16,889 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-21 16:12:16,889 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 341 transitions, 3146 flow [2024-06-21 16:12:16,889 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) [2024-06-21 16:12:16,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:16,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:16,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:12:16,890 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)] === [2024-06-21 16:12:16,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash 977090177, now seen corresponding path program 2 times [2024-06-21 16:12:16,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:16,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713041549] [2024-06-21 16:12:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:16,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:17,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:17,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713041549] [2024-06-21 16:12:17,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713041549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:17,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:17,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:17,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480174746] [2024-06-21 16:12:17,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:17,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:17,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:17,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:17,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:17,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:12:17,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 341 transitions, 3146 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:17,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:17,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:12:17,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:18,906 INFO L124 PetriNetUnfolderBase]: 2843/4583 cut-off events. [2024-06-21 16:12:18,906 INFO L125 PetriNetUnfolderBase]: For 966504/966516 co-relation queries the response was YES. [2024-06-21 16:12:18,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49817 conditions, 4583 events. 2843/4583 cut-off events. For 966504/966516 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 26441 event pairs, 632 based on Foata normal form. 5/4543 useless extension candidates. Maximal degree in co-relation 49697. Up to 3902 conditions per place. [2024-06-21 16:12:18,967 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 284 selfloop transitions, 29 changer transitions 0/369 dead transitions. [2024-06-21 16:12:18,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 369 transitions, 3930 flow [2024-06-21 16:12:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:12:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:12:18,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 16:12:18,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 16:12:18,968 INFO L175 Difference]: Start difference. First operand has 253 places, 341 transitions, 3146 flow. Second operand 8 states and 164 transitions. [2024-06-21 16:12:18,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 369 transitions, 3930 flow [2024-06-21 16:12:19,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 369 transitions, 3677 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 16:12:19,870 INFO L231 Difference]: Finished difference. Result has 254 places, 344 transitions, 3037 flow [2024-06-21 16:12:19,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2893, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3037, PETRI_PLACES=254, PETRI_TRANSITIONS=344} [2024-06-21 16:12:19,870 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-21 16:12:19,870 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 344 transitions, 3037 flow [2024-06-21 16:12:19,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:19,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:19,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:19,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:12:19,871 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)] === [2024-06-21 16:12:19,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:19,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1264199827, now seen corresponding path program 1 times [2024-06-21 16:12:19,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:19,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181234208] [2024-06-21 16:12:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:19,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:20,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:20,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181234208] [2024-06-21 16:12:20,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181234208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:20,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:20,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:20,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164483740] [2024-06-21 16:12:20,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:20,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:20,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:20,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:20,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:21,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:12:21,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 344 transitions, 3037 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:21,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:21,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:12:21,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:22,020 INFO L124 PetriNetUnfolderBase]: 2848/4595 cut-off events. [2024-06-21 16:12:22,020 INFO L125 PetriNetUnfolderBase]: For 989142/989156 co-relation queries the response was YES. [2024-06-21 16:12:22,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50042 conditions, 4595 events. 2848/4595 cut-off events. For 989142/989156 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 26564 event pairs, 631 based on Foata normal form. 5/4562 useless extension candidates. Maximal degree in co-relation 49921. Up to 3942 conditions per place. [2024-06-21 16:12:22,082 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 291 selfloop transitions, 24 changer transitions 0/371 dead transitions. [2024-06-21 16:12:22,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 371 transitions, 3807 flow [2024-06-21 16:12:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:12:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:12:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:12:22,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-21 16:12:22,083 INFO L175 Difference]: Start difference. First operand has 254 places, 344 transitions, 3037 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:12:22,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 371 transitions, 3807 flow [2024-06-21 16:12:22,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 371 transitions, 3685 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:22,865 INFO L231 Difference]: Finished difference. Result has 256 places, 347 transitions, 3035 flow [2024-06-21 16:12:22,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2915, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3035, PETRI_PLACES=256, PETRI_TRANSITIONS=347} [2024-06-21 16:12:22,865 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-21 16:12:22,866 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 347 transitions, 3035 flow [2024-06-21 16:12:22,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:22,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:22,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:22,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:12:22,866 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)] === [2024-06-21 16:12:22,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:22,866 INFO L85 PathProgramCache]: Analyzing trace with hash -504114255, now seen corresponding path program 1 times [2024-06-21 16:12:22,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:22,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916050424] [2024-06-21 16:12:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:22,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:23,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:23,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916050424] [2024-06-21 16:12:23,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916050424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:23,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:23,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:23,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968966272] [2024-06-21 16:12:23,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:23,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:23,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:23,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:23,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:23,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:12:23,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 347 transitions, 3035 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) [2024-06-21 16:12:23,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:23,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:12:23,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:24,729 INFO L124 PetriNetUnfolderBase]: 3098/4879 cut-off events. [2024-06-21 16:12:24,730 INFO L125 PetriNetUnfolderBase]: For 1019003/1019012 co-relation queries the response was YES. [2024-06-21 16:12:24,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52128 conditions, 4879 events. 3098/4879 cut-off events. For 1019003/1019012 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 27487 event pairs, 662 based on Foata normal form. 9/4871 useless extension candidates. Maximal degree in co-relation 52006. Up to 4390 conditions per place. [2024-06-21 16:12:24,790 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 314 selfloop transitions, 27 changer transitions 0/371 dead transitions. [2024-06-21 16:12:24,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 371 transitions, 3875 flow [2024-06-21 16:12:24,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 16:12:24,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-21 16:12:24,791 INFO L175 Difference]: Start difference. First operand has 256 places, 347 transitions, 3035 flow. Second operand 7 states and 139 transitions. [2024-06-21 16:12:24,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 371 transitions, 3875 flow [2024-06-21 16:12:25,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 371 transitions, 3777 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:25,736 INFO L231 Difference]: Finished difference. Result has 257 places, 350 transitions, 3090 flow [2024-06-21 16:12:25,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3090, PETRI_PLACES=257, PETRI_TRANSITIONS=350} [2024-06-21 16:12:25,737 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 212 predicate places. [2024-06-21 16:12:25,737 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 350 transitions, 3090 flow [2024-06-21 16:12:25,737 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) [2024-06-21 16:12:25,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:25,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:25,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:12:25,737 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)] === [2024-06-21 16:12:25,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1262825027, now seen corresponding path program 2 times [2024-06-21 16:12:25,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:25,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412997898] [2024-06-21 16:12:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:25,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:26,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:26,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412997898] [2024-06-21 16:12:26,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412997898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:26,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:26,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:26,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875854597] [2024-06-21 16:12:26,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:26,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:26,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:26,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:26,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:26,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:12:26,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 350 transitions, 3090 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) [2024-06-21 16:12:26,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:26,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:12:26,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:27,683 INFO L124 PetriNetUnfolderBase]: 3111/4898 cut-off events. [2024-06-21 16:12:27,684 INFO L125 PetriNetUnfolderBase]: For 1046595/1046604 co-relation queries the response was YES. [2024-06-21 16:12:27,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53032 conditions, 4898 events. 3111/4898 cut-off events. For 1046595/1046604 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 27643 event pairs, 666 based on Foata normal form. 9/4890 useless extension candidates. Maximal degree in co-relation 52909. Up to 4394 conditions per place. [2024-06-21 16:12:27,741 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 309 selfloop transitions, 35 changer transitions 0/374 dead transitions. [2024-06-21 16:12:27,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 374 transitions, 4196 flow [2024-06-21 16:12:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 16:12:27,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 16:12:27,742 INFO L175 Difference]: Start difference. First operand has 257 places, 350 transitions, 3090 flow. Second operand 7 states and 138 transitions. [2024-06-21 16:12:27,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 374 transitions, 4196 flow [2024-06-21 16:12:28,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 374 transitions, 4067 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 16:12:28,885 INFO L231 Difference]: Finished difference. Result has 259 places, 356 transitions, 3227 flow [2024-06-21 16:12:28,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3227, PETRI_PLACES=259, PETRI_TRANSITIONS=356} [2024-06-21 16:12:28,885 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-21 16:12:28,885 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 356 transitions, 3227 flow [2024-06-21 16:12:28,886 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) [2024-06-21 16:12:28,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:28,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:28,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:12:28,886 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:28,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:28,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1077660171, now seen corresponding path program 5 times [2024-06-21 16:12:28,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:28,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836599683] [2024-06-21 16:12:28,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:28,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:29,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:29,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836599683] [2024-06-21 16:12:29,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836599683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:29,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:29,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:29,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215522759] [2024-06-21 16:12:29,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:29,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:29,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:29,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:29,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:30,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:12:30,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 356 transitions, 3227 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) [2024-06-21 16:12:30,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:30,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:12:30,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:31,515 INFO L124 PetriNetUnfolderBase]: 3286/5102 cut-off events. [2024-06-21 16:12:31,515 INFO L125 PetriNetUnfolderBase]: For 1083389/1083392 co-relation queries the response was YES. [2024-06-21 16:12:31,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55126 conditions, 5102 events. 3286/5102 cut-off events. For 1083389/1083392 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 28208 event pairs, 679 based on Foata normal form. 6/5105 useless extension candidates. Maximal degree in co-relation 55002. Up to 4526 conditions per place. [2024-06-21 16:12:31,576 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 313 selfloop transitions, 77 changer transitions 0/395 dead transitions. [2024-06-21 16:12:31,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 395 transitions, 4215 flow [2024-06-21 16:12:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 16:12:31,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-21 16:12:31,577 INFO L175 Difference]: Start difference. First operand has 259 places, 356 transitions, 3227 flow. Second operand 10 states and 194 transitions. [2024-06-21 16:12:31,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 395 transitions, 4215 flow [2024-06-21 16:12:32,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 395 transitions, 4087 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-21 16:12:32,492 INFO L231 Difference]: Finished difference. Result has 266 places, 358 transitions, 3354 flow [2024-06-21 16:12:32,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3099, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3354, PETRI_PLACES=266, PETRI_TRANSITIONS=358} [2024-06-21 16:12:32,493 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 221 predicate places. [2024-06-21 16:12:32,493 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 358 transitions, 3354 flow [2024-06-21 16:12:32,493 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) [2024-06-21 16:12:32,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:32,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:32,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:12:32,494 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:32,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:32,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1567232125, now seen corresponding path program 2 times [2024-06-21 16:12:32,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:32,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514039398] [2024-06-21 16:12:32,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:32,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:33,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:33,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514039398] [2024-06-21 16:12:33,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514039398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:33,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:33,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:33,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407860709] [2024-06-21 16:12:33,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:33,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:33,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:33,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:33,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:33,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:12:33,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 358 transitions, 3354 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) [2024-06-21 16:12:33,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:33,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:12:33,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:35,177 INFO L124 PetriNetUnfolderBase]: 3303/5129 cut-off events. [2024-06-21 16:12:35,177 INFO L125 PetriNetUnfolderBase]: For 1110274/1110277 co-relation queries the response was YES. [2024-06-21 16:12:35,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56016 conditions, 5129 events. 3303/5129 cut-off events. For 1110274/1110277 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28386 event pairs, 662 based on Foata normal form. 4/5130 useless extension candidates. Maximal degree in co-relation 55890. Up to 4459 conditions per place. [2024-06-21 16:12:35,246 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 309 selfloop transitions, 87 changer transitions 0/401 dead transitions. [2024-06-21 16:12:35,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 401 transitions, 4386 flow [2024-06-21 16:12:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 16:12:35,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 16:12:35,248 INFO L175 Difference]: Start difference. First operand has 266 places, 358 transitions, 3354 flow. Second operand 10 states and 198 transitions. [2024-06-21 16:12:35,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 401 transitions, 4386 flow [2024-06-21 16:12:36,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 401 transitions, 4149 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-21 16:12:36,027 INFO L231 Difference]: Finished difference. Result has 269 places, 363 transitions, 3412 flow [2024-06-21 16:12:36,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3117, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3412, PETRI_PLACES=269, PETRI_TRANSITIONS=363} [2024-06-21 16:12:36,028 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 224 predicate places. [2024-06-21 16:12:36,028 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 363 transitions, 3412 flow [2024-06-21 16:12:36,028 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) [2024-06-21 16:12:36,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:36,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:36,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:12:36,029 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:36,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1796920735, now seen corresponding path program 3 times [2024-06-21 16:12:36,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:36,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710455184] [2024-06-21 16:12:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:36,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:37,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:37,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710455184] [2024-06-21 16:12:37,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710455184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:37,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:37,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:37,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126594154] [2024-06-21 16:12:37,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:37,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:37,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:37,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:37,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:37,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:12:37,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 363 transitions, 3412 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) [2024-06-21 16:12:37,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:37,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:12:37,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:38,966 INFO L124 PetriNetUnfolderBase]: 3331/5187 cut-off events. [2024-06-21 16:12:38,967 INFO L125 PetriNetUnfolderBase]: For 1136275/1136278 co-relation queries the response was YES. [2024-06-21 16:12:39,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56945 conditions, 5187 events. 3331/5187 cut-off events. For 1136275/1136278 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 28917 event pairs, 672 based on Foata normal form. 4/5188 useless extension candidates. Maximal degree in co-relation 56817. Up to 4498 conditions per place. [2024-06-21 16:12:39,036 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 305 selfloop transitions, 97 changer transitions 0/407 dead transitions. [2024-06-21 16:12:39,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 407 transitions, 4477 flow [2024-06-21 16:12:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 16:12:39,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-21 16:12:39,038 INFO L175 Difference]: Start difference. First operand has 269 places, 363 transitions, 3412 flow. Second operand 10 states and 196 transitions. [2024-06-21 16:12:39,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 407 transitions, 4477 flow [2024-06-21 16:12:40,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 407 transitions, 4216 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 16:12:40,134 INFO L231 Difference]: Finished difference. Result has 273 places, 371 transitions, 3516 flow [2024-06-21 16:12:40,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3516, PETRI_PLACES=273, PETRI_TRANSITIONS=371} [2024-06-21 16:12:40,134 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-21 16:12:40,134 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 371 transitions, 3516 flow [2024-06-21 16:12:40,134 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) [2024-06-21 16:12:40,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:40,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:40,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:12:40,135 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:40,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:40,135 INFO L85 PathProgramCache]: Analyzing trace with hash -275347549, now seen corresponding path program 4 times [2024-06-21 16:12:40,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:40,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422329818] [2024-06-21 16:12:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:40,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:41,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:41,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422329818] [2024-06-21 16:12:41,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422329818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:41,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:41,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:41,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314945493] [2024-06-21 16:12:41,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:41,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:41,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:41,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:41,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:41,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:12:41,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 371 transitions, 3516 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) [2024-06-21 16:12:41,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:41,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:12:41,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:42,976 INFO L124 PetriNetUnfolderBase]: 3348/5199 cut-off events. [2024-06-21 16:12:42,976 INFO L125 PetriNetUnfolderBase]: For 1163606/1163609 co-relation queries the response was YES. [2024-06-21 16:12:43,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57811 conditions, 5199 events. 3348/5199 cut-off events. For 1163606/1163609 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 28827 event pairs, 662 based on Foata normal form. 4/5200 useless extension candidates. Maximal degree in co-relation 57681. Up to 4525 conditions per place. [2024-06-21 16:12:43,048 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 309 selfloop transitions, 95 changer transitions 0/409 dead transitions. [2024-06-21 16:12:43,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 409 transitions, 4532 flow [2024-06-21 16:12:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 16:12:43,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-21 16:12:43,049 INFO L175 Difference]: Start difference. First operand has 273 places, 371 transitions, 3516 flow. Second operand 10 states and 197 transitions. [2024-06-21 16:12:43,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 409 transitions, 4532 flow [2024-06-21 16:12:44,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 409 transitions, 4286 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 16:12:44,275 INFO L231 Difference]: Finished difference. Result has 278 places, 373 transitions, 3561 flow [2024-06-21 16:12:44,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3561, PETRI_PLACES=278, PETRI_TRANSITIONS=373} [2024-06-21 16:12:44,276 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-21 16:12:44,276 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 373 transitions, 3561 flow [2024-06-21 16:12:44,276 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) [2024-06-21 16:12:44,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:44,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:44,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:12:44,277 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:44,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:44,277 INFO L85 PathProgramCache]: Analyzing trace with hash -267005449, now seen corresponding path program 5 times [2024-06-21 16:12:44,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:44,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040944990] [2024-06-21 16:12:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:44,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:45,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:45,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040944990] [2024-06-21 16:12:45,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040944990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:45,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:45,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:45,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667310789] [2024-06-21 16:12:45,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:45,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:45,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:45,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:45,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:45,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:12:45,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 373 transitions, 3561 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) [2024-06-21 16:12:45,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:45,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:12:45,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:47,032 INFO L124 PetriNetUnfolderBase]: 3365/5226 cut-off events. [2024-06-21 16:12:47,032 INFO L125 PetriNetUnfolderBase]: For 1185164/1185167 co-relation queries the response was YES. [2024-06-21 16:12:47,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57549 conditions, 5226 events. 3365/5226 cut-off events. For 1185164/1185167 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 29029 event pairs, 658 based on Foata normal form. 4/5227 useless extension candidates. Maximal degree in co-relation 57418. Up to 4457 conditions per place. [2024-06-21 16:12:47,104 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 301 selfloop transitions, 106 changer transitions 0/412 dead transitions. [2024-06-21 16:12:47,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 412 transitions, 4583 flow [2024-06-21 16:12:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 16:12:47,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-21 16:12:47,105 INFO L175 Difference]: Start difference. First operand has 278 places, 373 transitions, 3561 flow. Second operand 10 states and 197 transitions. [2024-06-21 16:12:47,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 412 transitions, 4583 flow [2024-06-21 16:12:48,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 412 transitions, 4279 flow, removed 43 selfloop flow, removed 11 redundant places. [2024-06-21 16:12:48,248 INFO L231 Difference]: Finished difference. Result has 277 places, 375 transitions, 3568 flow [2024-06-21 16:12:48,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3257, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3568, PETRI_PLACES=277, PETRI_TRANSITIONS=375} [2024-06-21 16:12:48,249 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-21 16:12:48,249 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 375 transitions, 3568 flow [2024-06-21 16:12:48,249 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) [2024-06-21 16:12:48,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:48,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:48,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:12:48,250 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)] === [2024-06-21 16:12:48,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash 989127167, now seen corresponding path program 1 times [2024-06-21 16:12:48,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:48,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328686443] [2024-06-21 16:12:48,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:48,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:49,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:49,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328686443] [2024-06-21 16:12:49,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328686443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:49,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:49,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:49,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532191171] [2024-06-21 16:12:49,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:49,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:49,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:49,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:49,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:49,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:12:49,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 375 transitions, 3568 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:49,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:49,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:12:49,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:50,716 INFO L124 PetriNetUnfolderBase]: 2804/4597 cut-off events. [2024-06-21 16:12:50,716 INFO L125 PetriNetUnfolderBase]: For 1189239/1189263 co-relation queries the response was YES. [2024-06-21 16:12:50,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53695 conditions, 4597 events. 2804/4597 cut-off events. For 1189239/1189263 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 27333 event pairs, 623 based on Foata normal form. 6/4554 useless extension candidates. Maximal degree in co-relation 53566. Up to 3762 conditions per place. [2024-06-21 16:12:50,776 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 286 selfloop transitions, 19 changer transitions 0/397 dead transitions. [2024-06-21 16:12:50,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 397 transitions, 4318 flow [2024-06-21 16:12:50,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:12:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:12:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 16:12:50,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 16:12:50,777 INFO L175 Difference]: Start difference. First operand has 277 places, 375 transitions, 3568 flow. Second operand 8 states and 164 transitions. [2024-06-21 16:12:50,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 397 transitions, 4318 flow [2024-06-21 16:12:52,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 397 transitions, 4025 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-21 16:12:52,146 INFO L231 Difference]: Finished difference. Result has 277 places, 378 transitions, 3403 flow [2024-06-21 16:12:52,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3275, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3403, PETRI_PLACES=277, PETRI_TRANSITIONS=378} [2024-06-21 16:12:52,147 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-21 16:12:52,147 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 378 transitions, 3403 flow [2024-06-21 16:12:52,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:52,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:52,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:52,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:12:52,147 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)] === [2024-06-21 16:12:52,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:52,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1686311291, now seen corresponding path program 2 times [2024-06-21 16:12:52,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:52,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080433564] [2024-06-21 16:12:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:52,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:53,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:53,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080433564] [2024-06-21 16:12:53,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080433564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:53,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:53,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:53,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543235676] [2024-06-21 16:12:53,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:53,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:53,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:53,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:53,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:12:53,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 378 transitions, 3403 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:53,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:53,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:12:53,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:54,440 INFO L124 PetriNetUnfolderBase]: 2983/4806 cut-off events. [2024-06-21 16:12:54,441 INFO L125 PetriNetUnfolderBase]: For 1213689/1213699 co-relation queries the response was YES. [2024-06-21 16:12:54,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55479 conditions, 4806 events. 2983/4806 cut-off events. For 1213689/1213699 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 28066 event pairs, 633 based on Foata normal form. 1/4769 useless extension candidates. Maximal degree in co-relation 55349. Up to 4115 conditions per place. [2024-06-21 16:12:54,503 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 306 selfloop transitions, 36 changer transitions 0/402 dead transitions. [2024-06-21 16:12:54,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 402 transitions, 4483 flow [2024-06-21 16:12:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:12:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:12:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:12:54,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:12:54,504 INFO L175 Difference]: Start difference. First operand has 277 places, 378 transitions, 3403 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:12:54,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 402 transitions, 4483 flow [2024-06-21 16:12:55,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 402 transitions, 4377 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:55,474 INFO L231 Difference]: Finished difference. Result has 279 places, 384 transitions, 3533 flow [2024-06-21 16:12:55,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3533, PETRI_PLACES=279, PETRI_TRANSITIONS=384} [2024-06-21 16:12:55,475 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-21 16:12:55,475 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 384 transitions, 3533 flow [2024-06-21 16:12:55,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:55,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:55,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:55,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:12:55,475 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)] === [2024-06-21 16:12:55,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:55,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1686296907, now seen corresponding path program 3 times [2024-06-21 16:12:55,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:55,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966155500] [2024-06-21 16:12:55,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:55,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:56,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966155500] [2024-06-21 16:12:56,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966155500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:56,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:56,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:56,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585679402] [2024-06-21 16:12:56,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:56,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:56,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:56,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:56,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:56,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:12:56,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 384 transitions, 3533 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:56,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:56,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:12:56,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:57,650 INFO L124 PetriNetUnfolderBase]: 2988/4817 cut-off events. [2024-06-21 16:12:57,650 INFO L125 PetriNetUnfolderBase]: For 1240218/1240228 co-relation queries the response was YES. [2024-06-21 16:12:57,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56106 conditions, 4817 events. 2988/4817 cut-off events. For 1240218/1240228 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28099 event pairs, 633 based on Foata normal form. 1/4780 useless extension candidates. Maximal degree in co-relation 55975. Up to 4096 conditions per place. [2024-06-21 16:12:57,713 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 310 selfloop transitions, 35 changer transitions 0/405 dead transitions. [2024-06-21 16:12:57,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 405 transitions, 4369 flow [2024-06-21 16:12:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:12:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:12:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:12:57,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:12:57,715 INFO L175 Difference]: Start difference. First operand has 279 places, 384 transitions, 3533 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:12:57,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 405 transitions, 4369 flow [2024-06-21 16:12:58,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 405 transitions, 4264 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 16:12:58,548 INFO L231 Difference]: Finished difference. Result has 283 places, 387 transitions, 3600 flow [2024-06-21 16:12:58,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3600, PETRI_PLACES=283, PETRI_TRANSITIONS=387} [2024-06-21 16:12:58,549 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 238 predicate places. [2024-06-21 16:12:58,549 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 387 transitions, 3600 flow [2024-06-21 16:12:58,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:58,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:58,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:58,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:12:58,549 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)] === [2024-06-21 16:12:58,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:58,550 INFO L85 PathProgramCache]: Analyzing trace with hash 989112721, now seen corresponding path program 3 times [2024-06-21 16:12:58,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:58,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973730136] [2024-06-21 16:12:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:58,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:59,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:59,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973730136] [2024-06-21 16:12:59,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973730136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:59,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:59,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:59,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113359920] [2024-06-21 16:12:59,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:59,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:59,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:59,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:59,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:13:00,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:13:00,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 387 transitions, 3600 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:00,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:00,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:13:00,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:01,239 INFO L124 PetriNetUnfolderBase]: 2985/4813 cut-off events. [2024-06-21 16:13:01,239 INFO L125 PetriNetUnfolderBase]: For 1259887/1259899 co-relation queries the response was YES. [2024-06-21 16:13:01,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56579 conditions, 4813 events. 2985/4813 cut-off events. For 1259887/1259899 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28101 event pairs, 633 based on Foata normal form. 1/4776 useless extension candidates. Maximal degree in co-relation 56446. Up to 4128 conditions per place. [2024-06-21 16:13:01,308 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 316 selfloop transitions, 28 changer transitions 0/404 dead transitions. [2024-06-21 16:13:01,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 404 transitions, 4340 flow [2024-06-21 16:13:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:13:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:13:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:13:01,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 16:13:01,309 INFO L175 Difference]: Start difference. First operand has 283 places, 387 transitions, 3600 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:13:01,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 404 transitions, 4340 flow [2024-06-21 16:13:02,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 404 transitions, 4136 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-21 16:13:02,771 INFO L231 Difference]: Finished difference. Result has 285 places, 387 transitions, 3458 flow [2024-06-21 16:13:02,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3396, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3458, PETRI_PLACES=285, PETRI_TRANSITIONS=387} [2024-06-21 16:13:02,772 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-21 16:13:02,772 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 387 transitions, 3458 flow [2024-06-21 16:13:02,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:02,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:02,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:02,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:13:02,772 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)] === [2024-06-21 16:13:02,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:02,773 INFO L85 PathProgramCache]: Analyzing trace with hash -286046433, now seen corresponding path program 3 times [2024-06-21 16:13:02,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:02,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696856481] [2024-06-21 16:13:02,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:02,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:03,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:03,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696856481] [2024-06-21 16:13:03,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696856481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:03,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:03,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:13:03,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578031193] [2024-06-21 16:13:03,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:03,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:13:03,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:03,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:13:03,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:13:03,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:13:03,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 387 transitions, 3458 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) [2024-06-21 16:13:03,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:03,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:13:03,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:04,799 INFO L124 PetriNetUnfolderBase]: 3226/5092 cut-off events. [2024-06-21 16:13:04,799 INFO L125 PetriNetUnfolderBase]: For 1291024/1291038 co-relation queries the response was YES. [2024-06-21 16:13:04,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57871 conditions, 5092 events. 3226/5092 cut-off events. For 1291024/1291038 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 29040 event pairs, 662 based on Foata normal form. 11/5090 useless extension candidates. Maximal degree in co-relation 57737. Up to 4557 conditions per place. [2024-06-21 16:13:04,868 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 340 selfloop transitions, 27 changer transitions 0/406 dead transitions. [2024-06-21 16:13:04,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 406 transitions, 4260 flow [2024-06-21 16:13:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:13:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:13:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 16:13:04,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-21 16:13:04,869 INFO L175 Difference]: Start difference. First operand has 285 places, 387 transitions, 3458 flow. Second operand 7 states and 136 transitions. [2024-06-21 16:13:04,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 406 transitions, 4260 flow [2024-06-21 16:13:06,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 406 transitions, 4124 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 16:13:06,951 INFO L231 Difference]: Finished difference. Result has 285 places, 387 transitions, 3383 flow [2024-06-21 16:13:06,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3383, PETRI_PLACES=285, PETRI_TRANSITIONS=387} [2024-06-21 16:13:06,951 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-21 16:13:06,952 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 387 transitions, 3383 flow [2024-06-21 16:13:06,952 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) [2024-06-21 16:13:06,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:06,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:06,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:13:06,952 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)] === [2024-06-21 16:13:06,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:06,953 INFO L85 PathProgramCache]: Analyzing trace with hash -271761633, now seen corresponding path program 4 times [2024-06-21 16:13:06,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:06,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918509200] [2024-06-21 16:13:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:06,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:07,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:07,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918509200] [2024-06-21 16:13:07,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918509200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:07,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:07,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:13:07,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970880035] [2024-06-21 16:13:07,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:07,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:13:07,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:07,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:13:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:13:07,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:13:07,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 387 transitions, 3383 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) [2024-06-21 16:13:07,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:07,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:13:07,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:09,019 INFO L124 PetriNetUnfolderBase]: 3233/5100 cut-off events. [2024-06-21 16:13:09,019 INFO L125 PetriNetUnfolderBase]: For 1309733/1309745 co-relation queries the response was YES. [2024-06-21 16:13:09,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58189 conditions, 5100 events. 3233/5100 cut-off events. For 1309733/1309745 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29038 event pairs, 662 based on Foata normal form. 9/5089 useless extension candidates. Maximal degree in co-relation 58054. Up to 4553 conditions per place. [2024-06-21 16:13:09,085 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 332 selfloop transitions, 35 changer transitions 0/406 dead transitions. [2024-06-21 16:13:09,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 406 transitions, 4277 flow [2024-06-21 16:13:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:13:09,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:13:09,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 16:13:09,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-21 16:13:09,088 INFO L175 Difference]: Start difference. First operand has 285 places, 387 transitions, 3383 flow. Second operand 7 states and 134 transitions. [2024-06-21 16:13:09,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 406 transitions, 4277 flow [2024-06-21 16:13:10,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 406 transitions, 4203 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 16:13:10,696 INFO L231 Difference]: Finished difference. Result has 286 places, 390 transitions, 3495 flow [2024-06-21 16:13:10,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3495, PETRI_PLACES=286, PETRI_TRANSITIONS=390} [2024-06-21 16:13:10,697 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-21 16:13:10,697 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 390 transitions, 3495 flow [2024-06-21 16:13:10,697 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) [2024-06-21 16:13:10,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:10,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:10,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:13:10,697 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)] === [2024-06-21 16:13:10,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:10,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1831909151, now seen corresponding path program 5 times [2024-06-21 16:13:10,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:10,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025598974] [2024-06-21 16:13:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:10,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:11,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:11,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025598974] [2024-06-21 16:13:11,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025598974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:11,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:11,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:13:11,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696041859] [2024-06-21 16:13:11,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:11,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:13:11,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:11,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:13:11,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:13:11,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:13:11,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 390 transitions, 3495 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) [2024-06-21 16:13:11,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:11,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:13:11,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:12,877 INFO L124 PetriNetUnfolderBase]: 3238/5109 cut-off events. [2024-06-21 16:13:12,877 INFO L125 PetriNetUnfolderBase]: For 1336863/1336878 co-relation queries the response was YES. [2024-06-21 16:13:12,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58912 conditions, 5109 events. 3238/5109 cut-off events. For 1336863/1336878 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29124 event pairs, 676 based on Foata normal form. 11/5097 useless extension candidates. Maximal degree in co-relation 58776. Up to 4536 conditions per place. [2024-06-21 16:13:12,949 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 318 selfloop transitions, 52 changer transitions 0/409 dead transitions. [2024-06-21 16:13:12,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 409 transitions, 4697 flow [2024-06-21 16:13:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:13:12,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:13:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 16:13:12,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-21 16:13:12,950 INFO L175 Difference]: Start difference. First operand has 286 places, 390 transitions, 3495 flow. Second operand 7 states and 134 transitions. [2024-06-21 16:13:12,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 409 transitions, 4697 flow [2024-06-21 16:13:14,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 409 transitions, 4533 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 16:13:14,678 INFO L231 Difference]: Finished difference. Result has 288 places, 396 transitions, 3667 flow [2024-06-21 16:13:14,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3667, PETRI_PLACES=288, PETRI_TRANSITIONS=396} [2024-06-21 16:13:14,679 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-21 16:13:14,679 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 396 transitions, 3667 flow [2024-06-21 16:13:14,679 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) [2024-06-21 16:13:14,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:14,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:14,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:13:14,680 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)] === [2024-06-21 16:13:14,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:14,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1839527711, now seen corresponding path program 6 times [2024-06-21 16:13:14,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:14,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202690055] [2024-06-21 16:13:14,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:14,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:15,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:15,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202690055] [2024-06-21 16:13:15,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202690055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:15,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:15,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:13:15,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047285041] [2024-06-21 16:13:15,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:15,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:13:15,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:15,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:13:15,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:13:15,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:13:15,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 396 transitions, 3667 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) [2024-06-21 16:13:15,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:15,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:13:15,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:16,721 INFO L124 PetriNetUnfolderBase]: 3235/5105 cut-off events. [2024-06-21 16:13:16,721 INFO L125 PetriNetUnfolderBase]: For 1366885/1366902 co-relation queries the response was YES. [2024-06-21 16:13:16,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59277 conditions, 5105 events. 3235/5105 cut-off events. For 1366885/1366902 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29133 event pairs, 676 based on Foata normal form. 13/5102 useless extension candidates. Maximal degree in co-relation 59140. Up to 4533 conditions per place. [2024-06-21 16:13:16,797 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 317 selfloop transitions, 52 changer transitions 0/408 dead transitions. [2024-06-21 16:13:16,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 408 transitions, 4445 flow [2024-06-21 16:13:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:13:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:13:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 16:13:16,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 16:13:16,798 INFO L175 Difference]: Start difference. First operand has 288 places, 396 transitions, 3667 flow. Second operand 7 states and 133 transitions. [2024-06-21 16:13:16,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 408 transitions, 4445 flow [2024-06-21 16:13:18,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 408 transitions, 4167 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-21 16:13:18,512 INFO L231 Difference]: Finished difference. Result has 291 places, 396 transitions, 3499 flow [2024-06-21 16:13:18,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3389, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3499, PETRI_PLACES=291, PETRI_TRANSITIONS=396} [2024-06-21 16:13:18,513 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 246 predicate places. [2024-06-21 16:13:18,513 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 396 transitions, 3499 flow [2024-06-21 16:13:18,513 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) [2024-06-21 16:13:18,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:18,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:18,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:13:18,513 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:18,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:18,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1198553275, now seen corresponding path program 6 times [2024-06-21 16:13:18,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:18,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816436310] [2024-06-21 16:13:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:18,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:19,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:19,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816436310] [2024-06-21 16:13:19,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816436310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:19,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:19,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:13:19,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022369766] [2024-06-21 16:13:19,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:19,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:13:19,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:19,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:13:19,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:13:19,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:13:19,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 396 transitions, 3499 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) [2024-06-21 16:13:19,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:19,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:13:19,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:21,181 INFO L124 PetriNetUnfolderBase]: 3391/5267 cut-off events. [2024-06-21 16:13:21,182 INFO L125 PetriNetUnfolderBase]: For 1378592/1378592 co-relation queries the response was YES. [2024-06-21 16:13:21,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60000 conditions, 5267 events. 3391/5267 cut-off events. For 1378592/1378592 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29258 event pairs, 689 based on Foata normal form. 4/5256 useless extension candidates. Maximal degree in co-relation 59862. Up to 4686 conditions per place. [2024-06-21 16:13:21,258 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 349 selfloop transitions, 77 changer transitions 0/431 dead transitions. [2024-06-21 16:13:21,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 431 transitions, 4561 flow [2024-06-21 16:13:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 16:13:21,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-21 16:13:21,259 INFO L175 Difference]: Start difference. First operand has 291 places, 396 transitions, 3499 flow. Second operand 10 states and 191 transitions. [2024-06-21 16:13:21,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 431 transitions, 4561 flow [2024-06-21 16:13:23,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 431 transitions, 4439 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 16:13:23,559 INFO L231 Difference]: Finished difference. Result has 295 places, 398 transitions, 3646 flow [2024-06-21 16:13:23,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3377, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3646, PETRI_PLACES=295, PETRI_TRANSITIONS=398} [2024-06-21 16:13:23,560 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 250 predicate places. [2024-06-21 16:13:23,560 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 398 transitions, 3646 flow [2024-06-21 16:13:23,560 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) [2024-06-21 16:13:23,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:23,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:23,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:13:23,561 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:23,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:23,561 INFO L85 PathProgramCache]: Analyzing trace with hash 207511395, now seen corresponding path program 6 times [2024-06-21 16:13:23,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:23,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666616567] [2024-06-21 16:13:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:23,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:24,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:24,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666616567] [2024-06-21 16:13:24,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666616567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:24,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:24,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:13:24,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259012682] [2024-06-21 16:13:24,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:24,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:13:24,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:24,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:13:24,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:13:25,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:13:25,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 398 transitions, 3646 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) [2024-06-21 16:13:25,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:25,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:13:25,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:26,538 INFO L124 PetriNetUnfolderBase]: 3419/5315 cut-off events. [2024-06-21 16:13:26,538 INFO L125 PetriNetUnfolderBase]: For 1410026/1410035 co-relation queries the response was YES. [2024-06-21 16:13:26,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60982 conditions, 5315 events. 3419/5315 cut-off events. For 1410026/1410035 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29626 event pairs, 662 based on Foata normal form. 10/5314 useless extension candidates. Maximal degree in co-relation 60843. Up to 4627 conditions per place. [2024-06-21 16:13:26,611 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 324 selfloop transitions, 114 changer transitions 0/443 dead transitions. [2024-06-21 16:13:26,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 443 transitions, 4793 flow [2024-06-21 16:13:26,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:26,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:26,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 16:13:26,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-21 16:13:26,612 INFO L175 Difference]: Start difference. First operand has 295 places, 398 transitions, 3646 flow. Second operand 10 states and 191 transitions. [2024-06-21 16:13:26,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 443 transitions, 4793 flow [2024-06-21 16:13:28,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 443 transitions, 4542 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-21 16:13:28,269 INFO L231 Difference]: Finished difference. Result has 298 places, 410 transitions, 3843 flow [2024-06-21 16:13:28,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3843, PETRI_PLACES=298, PETRI_TRANSITIONS=410} [2024-06-21 16:13:28,270 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-21 16:13:28,270 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 410 transitions, 3843 flow [2024-06-21 16:13:28,270 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) [2024-06-21 16:13:28,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:28,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:28,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:13:28,270 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:28,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:28,271 INFO L85 PathProgramCache]: Analyzing trace with hash -602573769, now seen corresponding path program 7 times [2024-06-21 16:13:28,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:28,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704973234] [2024-06-21 16:13:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:28,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:29,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:29,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704973234] [2024-06-21 16:13:29,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704973234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:29,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:29,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:13:29,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701629156] [2024-06-21 16:13:29,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:29,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:13:29,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:29,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:13:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:13:29,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:13:29,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 410 transitions, 3843 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) [2024-06-21 16:13:29,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:29,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:13:29,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:31,046 INFO L124 PetriNetUnfolderBase]: 3436/5352 cut-off events. [2024-06-21 16:13:31,046 INFO L125 PetriNetUnfolderBase]: For 1439160/1439169 co-relation queries the response was YES. [2024-06-21 16:13:31,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61999 conditions, 5352 events. 3436/5352 cut-off events. For 1439160/1439169 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 29975 event pairs, 665 based on Foata normal form. 10/5351 useless extension candidates. Maximal degree in co-relation 61858. Up to 4654 conditions per place. [2024-06-21 16:13:31,123 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 339 selfloop transitions, 104 changer transitions 0/448 dead transitions. [2024-06-21 16:13:31,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 448 transitions, 4956 flow [2024-06-21 16:13:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 16:13:31,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-21 16:13:31,125 INFO L175 Difference]: Start difference. First operand has 298 places, 410 transitions, 3843 flow. Second operand 10 states and 193 transitions. [2024-06-21 16:13:31,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 448 transitions, 4956 flow [2024-06-21 16:13:33,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 448 transitions, 4713 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 16:13:33,261 INFO L231 Difference]: Finished difference. Result has 304 places, 413 transitions, 3940 flow [2024-06-21 16:13:33,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3600, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3940, PETRI_PLACES=304, PETRI_TRANSITIONS=413} [2024-06-21 16:13:33,261 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 259 predicate places. [2024-06-21 16:13:33,262 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 413 transitions, 3940 flow [2024-06-21 16:13:33,262 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) [2024-06-21 16:13:33,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:33,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:33,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:13:33,262 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:33,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:33,263 INFO L85 PathProgramCache]: Analyzing trace with hash -380928729, now seen corresponding path program 8 times [2024-06-21 16:13:33,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:33,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446899026] [2024-06-21 16:13:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:33,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:34,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:34,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446899026] [2024-06-21 16:13:34,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446899026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:34,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:34,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:13:34,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461190463] [2024-06-21 16:13:34,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:34,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:13:34,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:34,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:13:34,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:13:34,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:13:34,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 413 transitions, 3940 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) [2024-06-21 16:13:34,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:34,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:13:34,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:36,039 INFO L124 PetriNetUnfolderBase]: 3464/5390 cut-off events. [2024-06-21 16:13:36,039 INFO L125 PetriNetUnfolderBase]: For 1465496/1465505 co-relation queries the response was YES. [2024-06-21 16:13:36,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61899 conditions, 5390 events. 3464/5390 cut-off events. For 1465496/1465505 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30177 event pairs, 667 based on Foata normal form. 10/5389 useless extension candidates. Maximal degree in co-relation 61756. Up to 4693 conditions per place. [2024-06-21 16:13:36,120 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 344 selfloop transitions, 104 changer transitions 0/453 dead transitions. [2024-06-21 16:13:36,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 453 transitions, 5093 flow [2024-06-21 16:13:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 16:13:36,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 16:13:36,121 INFO L175 Difference]: Start difference. First operand has 304 places, 413 transitions, 3940 flow. Second operand 10 states and 195 transitions. [2024-06-21 16:13:36,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 453 transitions, 5093 flow [2024-06-21 16:13:37,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 453 transitions, 4780 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 16:13:37,518 INFO L231 Difference]: Finished difference. Result has 308 places, 419 transitions, 4005 flow [2024-06-21 16:13:37,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3633, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4005, PETRI_PLACES=308, PETRI_TRANSITIONS=419} [2024-06-21 16:13:37,518 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-21 16:13:37,518 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 419 transitions, 4005 flow [2024-06-21 16:13:37,518 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) [2024-06-21 16:13:37,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:37,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:37,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:13:37,519 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:37,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:37,519 INFO L85 PathProgramCache]: Analyzing trace with hash -134776965, now seen corresponding path program 9 times [2024-06-21 16:13:37,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:37,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65734658] [2024-06-21 16:13:37,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:37,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:38,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:38,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65734658] [2024-06-21 16:13:38,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65734658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:38,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:38,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:13:38,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190227983] [2024-06-21 16:13:38,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:38,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:13:38,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:38,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:13:38,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:13:38,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:13:38,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 419 transitions, 4005 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) [2024-06-21 16:13:38,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:38,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:13:38,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:40,291 INFO L124 PetriNetUnfolderBase]: 3481/5422 cut-off events. [2024-06-21 16:13:40,291 INFO L125 PetriNetUnfolderBase]: For 1494754/1494763 co-relation queries the response was YES. [2024-06-21 16:13:40,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62441 conditions, 5422 events. 3481/5422 cut-off events. For 1494754/1494763 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 30425 event pairs, 672 based on Foata normal form. 10/5421 useless extension candidates. Maximal degree in co-relation 62296. Up to 4679 conditions per place. [2024-06-21 16:13:40,368 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 328 selfloop transitions, 122 changer transitions 0/455 dead transitions. [2024-06-21 16:13:40,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 455 transitions, 5117 flow [2024-06-21 16:13:40,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 16:13:40,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-21 16:13:40,369 INFO L175 Difference]: Start difference. First operand has 308 places, 419 transitions, 4005 flow. Second operand 10 states and 193 transitions. [2024-06-21 16:13:40,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 455 transitions, 5117 flow [2024-06-21 16:13:41,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 455 transitions, 4804 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-21 16:13:42,002 INFO L231 Difference]: Finished difference. Result has 311 places, 421 transitions, 4055 flow [2024-06-21 16:13:42,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3692, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4055, PETRI_PLACES=311, PETRI_TRANSITIONS=421} [2024-06-21 16:13:42,002 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-21 16:13:42,002 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 421 transitions, 4055 flow [2024-06-21 16:13:42,002 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) [2024-06-21 16:13:42,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:42,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:42,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:13:42,003 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:42,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:42,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1669367151, now seen corresponding path program 10 times [2024-06-21 16:13:42,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:42,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357339432] [2024-06-21 16:13:42,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:42,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:43,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:43,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357339432] [2024-06-21 16:13:43,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357339432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:43,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:43,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:13:43,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910371162] [2024-06-21 16:13:43,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:43,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:13:43,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:13:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:13:43,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:13:43,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 421 transitions, 4055 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) [2024-06-21 16:13:43,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:43,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:13:43,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:44,787 INFO L124 PetriNetUnfolderBase]: 3498/5449 cut-off events. [2024-06-21 16:13:44,787 INFO L125 PetriNetUnfolderBase]: For 1524579/1524588 co-relation queries the response was YES. [2024-06-21 16:13:44,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63054 conditions, 5449 events. 3498/5449 cut-off events. For 1524579/1524588 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30633 event pairs, 618 based on Foata normal form. 10/5448 useless extension candidates. Maximal degree in co-relation 62908. Up to 4408 conditions per place. [2024-06-21 16:13:44,862 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 312 selfloop transitions, 145 changer transitions 0/462 dead transitions. [2024-06-21 16:13:44,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 462 transitions, 5669 flow [2024-06-21 16:13:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 16:13:44,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 16:13:44,864 INFO L175 Difference]: Start difference. First operand has 311 places, 421 transitions, 4055 flow. Second operand 10 states and 195 transitions. [2024-06-21 16:13:44,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 462 transitions, 5669 flow [2024-06-21 16:13:46,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 462 transitions, 5324 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-21 16:13:46,649 INFO L231 Difference]: Finished difference. Result has 313 places, 425 transitions, 4235 flow [2024-06-21 16:13:46,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3710, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4235, PETRI_PLACES=313, PETRI_TRANSITIONS=425} [2024-06-21 16:13:46,649 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-21 16:13:46,649 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 425 transitions, 4235 flow [2024-06-21 16:13:46,649 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) [2024-06-21 16:13:46,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:46,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:46,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:13:46,650 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:46,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:46,650 INFO L85 PathProgramCache]: Analyzing trace with hash -157773515, now seen corresponding path program 11 times [2024-06-21 16:13:46,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:46,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546666190] [2024-06-21 16:13:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:46,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:47,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:47,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546666190] [2024-06-21 16:13:47,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546666190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:47,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:47,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:13:47,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361987238] [2024-06-21 16:13:47,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:47,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:13:47,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:13:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:13:47,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:13:47,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 425 transitions, 4235 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) [2024-06-21 16:13:47,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:47,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:13:47,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:49,662 INFO L124 PetriNetUnfolderBase]: 3526/5492 cut-off events. [2024-06-21 16:13:49,662 INFO L125 PetriNetUnfolderBase]: For 1555664/1555673 co-relation queries the response was YES. [2024-06-21 16:13:49,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63823 conditions, 5492 events. 3526/5492 cut-off events. For 1555664/1555673 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 30891 event pairs, 682 based on Foata normal form. 10/5491 useless extension candidates. Maximal degree in co-relation 63676. Up to 4786 conditions per place. [2024-06-21 16:13:49,737 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 343 selfloop transitions, 115 changer transitions 0/463 dead transitions. [2024-06-21 16:13:49,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 463 transitions, 5399 flow [2024-06-21 16:13:49,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 16:13:49,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-21 16:13:49,738 INFO L175 Difference]: Start difference. First operand has 313 places, 425 transitions, 4235 flow. Second operand 10 states and 193 transitions. [2024-06-21 16:13:49,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 463 transitions, 5399 flow [2024-06-21 16:13:51,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 463 transitions, 5093 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-21 16:13:51,900 INFO L231 Difference]: Finished difference. Result has 317 places, 430 transitions, 4316 flow [2024-06-21 16:13:51,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3956, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4316, PETRI_PLACES=317, PETRI_TRANSITIONS=430} [2024-06-21 16:13:51,901 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-21 16:13:51,901 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 430 transitions, 4316 flow [2024-06-21 16:13:51,901 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) [2024-06-21 16:13:51,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:51,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:51,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:13:51,901 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:51,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:51,902 INFO L85 PathProgramCache]: Analyzing trace with hash -157474985, now seen corresponding path program 12 times [2024-06-21 16:13:51,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:51,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847046839] [2024-06-21 16:13:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:51,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:53,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:53,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847046839] [2024-06-21 16:13:53,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847046839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:53,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:53,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:13:53,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491937722] [2024-06-21 16:13:53,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:53,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:13:53,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:53,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:13:53,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:13:53,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:13:53,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 430 transitions, 4316 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) [2024-06-21 16:13:53,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:53,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:13:53,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:54,872 INFO L124 PetriNetUnfolderBase]: 3568/5553 cut-off events. [2024-06-21 16:13:54,872 INFO L125 PetriNetUnfolderBase]: For 1600956/1600965 co-relation queries the response was YES. [2024-06-21 16:13:54,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65127 conditions, 5553 events. 3568/5553 cut-off events. For 1600956/1600965 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 31247 event pairs, 674 based on Foata normal form. 10/5552 useless extension candidates. Maximal degree in co-relation 64978. Up to 4787 conditions per place. [2024-06-21 16:13:54,944 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 345 selfloop transitions, 120 changer transitions 0/470 dead transitions. [2024-06-21 16:13:54,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 470 transitions, 5920 flow [2024-06-21 16:13:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 16:13:54,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-21 16:13:54,945 INFO L175 Difference]: Start difference. First operand has 317 places, 430 transitions, 4316 flow. Second operand 10 states and 196 transitions. [2024-06-21 16:13:54,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 470 transitions, 5920 flow [2024-06-21 16:13:57,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 470 transitions, 5581 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-06-21 16:13:57,055 INFO L231 Difference]: Finished difference. Result has 317 places, 434 transitions, 4420 flow [2024-06-21 16:13:57,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3977, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4420, PETRI_PLACES=317, PETRI_TRANSITIONS=434} [2024-06-21 16:13:57,055 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-21 16:13:57,055 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 434 transitions, 4420 flow [2024-06-21 16:13:57,055 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) [2024-06-21 16:13:57,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:57,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:57,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:13:57,056 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:57,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:57,056 INFO L85 PathProgramCache]: Analyzing trace with hash 739158359, now seen corresponding path program 13 times [2024-06-21 16:13:57,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:57,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883251593] [2024-06-21 16:13:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:57,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:58,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:58,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883251593] [2024-06-21 16:13:58,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883251593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:58,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:58,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:13:58,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807486367] [2024-06-21 16:13:58,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:58,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:13:58,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:58,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:13:58,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:13:58,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:13:58,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 434 transitions, 4420 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) [2024-06-21 16:13:58,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:58,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:13:58,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:59,964 INFO L124 PetriNetUnfolderBase]: 3585/5590 cut-off events. [2024-06-21 16:13:59,964 INFO L125 PetriNetUnfolderBase]: For 1630133/1630142 co-relation queries the response was YES. [2024-06-21 16:14:00,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65486 conditions, 5590 events. 3585/5590 cut-off events. For 1630133/1630142 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31598 event pairs, 694 based on Foata normal form. 10/5589 useless extension candidates. Maximal degree in co-relation 65341. Up to 4879 conditions per place. [2024-06-21 16:14:00,228 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 357 selfloop transitions, 108 changer transitions 0/470 dead transitions. [2024-06-21 16:14:00,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 470 transitions, 5558 flow [2024-06-21 16:14:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:14:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:14:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 16:14:00,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-21 16:14:00,230 INFO L175 Difference]: Start difference. First operand has 317 places, 434 transitions, 4420 flow. Second operand 10 states and 194 transitions. [2024-06-21 16:14:00,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 470 transitions, 5558 flow [2024-06-21 16:14:02,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 470 transitions, 5335 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:02,061 INFO L231 Difference]: Finished difference. Result has 321 places, 436 transitions, 4524 flow [2024-06-21 16:14:02,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4197, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4524, PETRI_PLACES=321, PETRI_TRANSITIONS=436} [2024-06-21 16:14:02,061 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-21 16:14:02,062 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 436 transitions, 4524 flow [2024-06-21 16:14:02,062 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) [2024-06-21 16:14:02,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:02,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:02,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:14:02,062 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:02,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:02,062 INFO L85 PathProgramCache]: Analyzing trace with hash -165817085, now seen corresponding path program 14 times [2024-06-21 16:14:02,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:02,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52732880] [2024-06-21 16:14:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:02,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:03,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:03,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52732880] [2024-06-21 16:14:03,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52732880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:03,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:03,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:14:03,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734070327] [2024-06-21 16:14:03,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:03,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:14:03,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:03,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:14:03,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:14:03,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:14:03,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 436 transitions, 4524 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) [2024-06-21 16:14:03,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:03,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:14:03,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:04,989 INFO L124 PetriNetUnfolderBase]: 3577/5563 cut-off events. [2024-06-21 16:14:04,989 INFO L125 PetriNetUnfolderBase]: For 1637672/1637681 co-relation queries the response was YES. [2024-06-21 16:14:05,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65267 conditions, 5563 events. 3577/5563 cut-off events. For 1637672/1637681 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31295 event pairs, 677 based on Foata normal form. 10/5562 useless extension candidates. Maximal degree in co-relation 65120. Up to 4867 conditions per place. [2024-06-21 16:14:05,069 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 348 selfloop transitions, 116 changer transitions 0/469 dead transitions. [2024-06-21 16:14:05,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 469 transitions, 5554 flow [2024-06-21 16:14:05,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:14:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:14:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 16:14:05,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-21 16:14:05,071 INFO L175 Difference]: Start difference. First operand has 321 places, 436 transitions, 4524 flow. Second operand 10 states and 192 transitions. [2024-06-21 16:14:05,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 469 transitions, 5554 flow [2024-06-21 16:14:07,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 469 transitions, 5138 flow, removed 87 selfloop flow, removed 7 redundant places. [2024-06-21 16:14:07,848 INFO L231 Difference]: Finished difference. Result has 324 places, 436 transitions, 4347 flow [2024-06-21 16:14:07,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4347, PETRI_PLACES=324, PETRI_TRANSITIONS=436} [2024-06-21 16:14:07,849 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 279 predicate places. [2024-06-21 16:14:07,849 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 436 transitions, 4347 flow [2024-06-21 16:14:07,849 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) [2024-06-21 16:14:07,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:07,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:07,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:14:07,849 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:07,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:07,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1096536619, now seen corresponding path program 15 times [2024-06-21 16:14:07,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:07,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244175329] [2024-06-21 16:14:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:07,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:09,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:09,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244175329] [2024-06-21 16:14:09,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244175329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:09,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:09,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:14:09,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833577117] [2024-06-21 16:14:09,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:09,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:14:09,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:09,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:14:09,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:14:09,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:14:09,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 436 transitions, 4347 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) [2024-06-21 16:14:09,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:09,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:14:09,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:10,616 INFO L124 PetriNetUnfolderBase]: 3569/5556 cut-off events. [2024-06-21 16:14:10,617 INFO L125 PetriNetUnfolderBase]: For 1640643/1640652 co-relation queries the response was YES. [2024-06-21 16:14:10,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64498 conditions, 5556 events. 3569/5556 cut-off events. For 1640643/1640652 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 31327 event pairs, 675 based on Foata normal form. 10/5555 useless extension candidates. Maximal degree in co-relation 64350. Up to 4778 conditions per place. [2024-06-21 16:14:10,697 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 351 selfloop transitions, 115 changer transitions 0/471 dead transitions. [2024-06-21 16:14:10,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 471 transitions, 5389 flow [2024-06-21 16:14:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:14:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:14:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 16:14:10,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 16:14:10,698 INFO L175 Difference]: Start difference. First operand has 324 places, 436 transitions, 4347 flow. Second operand 10 states and 195 transitions. [2024-06-21 16:14:10,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 471 transitions, 5389 flow [2024-06-21 16:14:13,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 471 transitions, 5099 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 16:14:13,487 INFO L231 Difference]: Finished difference. Result has 325 places, 436 transitions, 4294 flow [2024-06-21 16:14:13,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4294, PETRI_PLACES=325, PETRI_TRANSITIONS=436} [2024-06-21 16:14:13,487 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-21 16:14:13,488 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 436 transitions, 4294 flow [2024-06-21 16:14:13,488 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) [2024-06-21 16:14:13,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:13,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:13,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:14:13,488 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)] === [2024-06-21 16:14:13,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1831918079, now seen corresponding path program 2 times [2024-06-21 16:14:13,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:13,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510622580] [2024-06-21 16:14:13,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:13,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:14,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:14,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510622580] [2024-06-21 16:14:14,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510622580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:14,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:14,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:14,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383128605] [2024-06-21 16:14:14,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:14,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:14,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:14,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:15,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:14:15,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 436 transitions, 4294 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:15,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:15,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:14:15,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:16,126 INFO L124 PetriNetUnfolderBase]: 3000/4933 cut-off events. [2024-06-21 16:14:16,126 INFO L125 PetriNetUnfolderBase]: For 1647705/1647731 co-relation queries the response was YES. [2024-06-21 16:14:16,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60318 conditions, 4933 events. 3000/4933 cut-off events. For 1647705/1647731 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 29794 event pairs, 643 based on Foata normal form. 12/4898 useless extension candidates. Maximal degree in co-relation 60169. Up to 3983 conditions per place. [2024-06-21 16:14:16,200 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 315 selfloop transitions, 24 changer transitions 0/453 dead transitions. [2024-06-21 16:14:16,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 453 transitions, 5108 flow [2024-06-21 16:14:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:14:16,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:14:16,201 INFO L175 Difference]: Start difference. First operand has 325 places, 436 transitions, 4294 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:14:16,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 453 transitions, 5108 flow [2024-06-21 16:14:18,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 453 transitions, 4681 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-21 16:14:18,545 INFO L231 Difference]: Finished difference. Result has 323 places, 439 transitions, 4017 flow [2024-06-21 16:14:18,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3867, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4017, PETRI_PLACES=323, PETRI_TRANSITIONS=439} [2024-06-21 16:14:18,546 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-21 16:14:18,546 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 439 transitions, 4017 flow [2024-06-21 16:14:18,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:18,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:18,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:18,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:14:18,546 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)] === [2024-06-21 16:14:18,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:18,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1831917583, now seen corresponding path program 4 times [2024-06-21 16:14:18,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:18,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504262692] [2024-06-21 16:14:18,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:18,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:19,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:19,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504262692] [2024-06-21 16:14:19,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504262692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:19,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:19,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:19,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87346330] [2024-06-21 16:14:19,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:19,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:19,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:19,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:19,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:14:19,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 439 transitions, 4017 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:19,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:19,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:14:19,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:21,033 INFO L124 PetriNetUnfolderBase]: 3182/5127 cut-off events. [2024-06-21 16:14:21,033 INFO L125 PetriNetUnfolderBase]: For 1681580/1681603 co-relation queries the response was YES. [2024-06-21 16:14:21,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62109 conditions, 5127 events. 3182/5127 cut-off events. For 1681580/1681603 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30150 event pairs, 648 based on Foata normal form. 9/5091 useless extension candidates. Maximal degree in co-relation 61960. Up to 4419 conditions per place. [2024-06-21 16:14:21,110 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 354 selfloop transitions, 40 changer transitions 0/458 dead transitions. [2024-06-21 16:14:21,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 458 transitions, 5263 flow [2024-06-21 16:14:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:14:21,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-21 16:14:21,111 INFO L175 Difference]: Start difference. First operand has 323 places, 439 transitions, 4017 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:14:21,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 458 transitions, 5263 flow [2024-06-21 16:14:24,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 458 transitions, 5135 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:24,227 INFO L231 Difference]: Finished difference. Result has 325 places, 445 transitions, 4173 flow [2024-06-21 16:14:24,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4173, PETRI_PLACES=325, PETRI_TRANSITIONS=445} [2024-06-21 16:14:24,227 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-21 16:14:24,227 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 445 transitions, 4173 flow [2024-06-21 16:14:24,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:24,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:24,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:24,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:14:24,228 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)] === [2024-06-21 16:14:24,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:24,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1848107519, now seen corresponding path program 3 times [2024-06-21 16:14:24,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:24,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369819546] [2024-06-21 16:14:24,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:24,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:25,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:25,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369819546] [2024-06-21 16:14:25,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369819546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:25,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:25,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:25,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803235075] [2024-06-21 16:14:25,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:25,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:25,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:25,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:25,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:25,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:14:25,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 445 transitions, 4173 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:25,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:25,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:14:25,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:27,006 INFO L124 PetriNetUnfolderBase]: 3007/4955 cut-off events. [2024-06-21 16:14:27,006 INFO L125 PetriNetUnfolderBase]: For 1710870/1710884 co-relation queries the response was YES. [2024-06-21 16:14:27,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60884 conditions, 4955 events. 3007/4955 cut-off events. For 1710870/1710884 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 30066 event pairs, 653 based on Foata normal form. 4/4923 useless extension candidates. Maximal degree in co-relation 60734. Up to 4026 conditions per place. [2024-06-21 16:14:27,082 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 326 selfloop transitions, 19 changer transitions 0/461 dead transitions. [2024-06-21 16:14:27,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 461 transitions, 5000 flow [2024-06-21 16:14:27,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:14:27,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:14:27,083 INFO L175 Difference]: Start difference. First operand has 325 places, 445 transitions, 4173 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:14:27,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 461 transitions, 5000 flow [2024-06-21 16:14:28,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 461 transitions, 4859 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-21 16:14:28,960 INFO L231 Difference]: Finished difference. Result has 329 places, 448 transitions, 4181 flow [2024-06-21 16:14:28,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4032, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4181, PETRI_PLACES=329, PETRI_TRANSITIONS=448} [2024-06-21 16:14:28,960 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-21 16:14:28,960 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 448 transitions, 4181 flow [2024-06-21 16:14:28,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:28,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:28,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:28,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:14:28,961 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)] === [2024-06-21 16:14:28,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:28,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1847572273, now seen corresponding path program 5 times [2024-06-21 16:14:28,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:28,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123541867] [2024-06-21 16:14:28,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:28,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:30,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:30,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123541867] [2024-06-21 16:14:30,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123541867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:30,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:30,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:30,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922045884] [2024-06-21 16:14:30,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:30,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:30,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:30,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:30,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:30,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:14:30,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 448 transitions, 4181 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:30,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:30,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:14:30,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:31,503 INFO L124 PetriNetUnfolderBase]: 3189/5137 cut-off events. [2024-06-21 16:14:31,504 INFO L125 PetriNetUnfolderBase]: For 1732745/1732768 co-relation queries the response was YES. [2024-06-21 16:14:31,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63130 conditions, 5137 events. 3189/5137 cut-off events. For 1732745/1732768 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30256 event pairs, 649 based on Foata normal form. 9/5101 useless extension candidates. Maximal degree in co-relation 62978. Up to 4408 conditions per place. [2024-06-21 16:14:31,574 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 342 selfloop transitions, 58 changer transitions 0/464 dead transitions. [2024-06-21 16:14:31,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 464 transitions, 5355 flow [2024-06-21 16:14:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:14:31,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-21 16:14:31,575 INFO L175 Difference]: Start difference. First operand has 329 places, 448 transitions, 4181 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:14:31,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 464 transitions, 5355 flow [2024-06-21 16:14:34,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 464 transitions, 5196 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 16:14:34,094 INFO L231 Difference]: Finished difference. Result has 330 places, 451 transitions, 4254 flow [2024-06-21 16:14:34,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4022, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4254, PETRI_PLACES=330, PETRI_TRANSITIONS=451} [2024-06-21 16:14:34,094 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 285 predicate places. [2024-06-21 16:14:34,094 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 451 transitions, 4254 flow [2024-06-21 16:14:34,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:34,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:34,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:34,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:14:34,095 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)] === [2024-06-21 16:14:34,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1721299477, now seen corresponding path program 6 times [2024-06-21 16:14:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:34,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181607735] [2024-06-21 16:14:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:34,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:35,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:35,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181607735] [2024-06-21 16:14:35,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181607735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:35,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:35,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:35,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035498321] [2024-06-21 16:14:35,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:35,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:35,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:35,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:35,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:35,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:14:35,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 451 transitions, 4254 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:35,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:35,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:14:35,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:36,815 INFO L124 PetriNetUnfolderBase]: 3184/5131 cut-off events. [2024-06-21 16:14:36,816 INFO L125 PetriNetUnfolderBase]: For 1752227/1752250 co-relation queries the response was YES. [2024-06-21 16:14:36,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63432 conditions, 5131 events. 3184/5131 cut-off events. For 1752227/1752250 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30253 event pairs, 649 based on Foata normal form. 9/5095 useless extension candidates. Maximal degree in co-relation 63280. Up to 4432 conditions per place. [2024-06-21 16:14:36,895 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 364 selfloop transitions, 35 changer transitions 0/463 dead transitions. [2024-06-21 16:14:36,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 463 transitions, 5088 flow [2024-06-21 16:14:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:14:36,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:14:36,896 INFO L175 Difference]: Start difference. First operand has 330 places, 451 transitions, 4254 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:14:36,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 463 transitions, 5088 flow [2024-06-21 16:14:39,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 463 transitions, 4806 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:39,744 INFO L231 Difference]: Finished difference. Result has 332 places, 451 transitions, 4048 flow [2024-06-21 16:14:39,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4048, PETRI_PLACES=332, PETRI_TRANSITIONS=451} [2024-06-21 16:14:39,745 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 287 predicate places. [2024-06-21 16:14:39,745 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 451 transitions, 4048 flow [2024-06-21 16:14:39,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:39,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:39,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:39,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:14:39,745 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)] === [2024-06-21 16:14:39,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:39,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1847572769, now seen corresponding path program 4 times [2024-06-21 16:14:39,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:39,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229867369] [2024-06-21 16:14:39,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:39,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:41,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:41,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229867369] [2024-06-21 16:14:41,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229867369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:41,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:41,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:41,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402199909] [2024-06-21 16:14:41,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:41,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:41,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:41,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:41,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:41,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:14:41,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 451 transitions, 4048 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:41,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:41,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:14:41,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:42,315 INFO L124 PetriNetUnfolderBase]: 3008/4952 cut-off events. [2024-06-21 16:14:42,315 INFO L125 PetriNetUnfolderBase]: For 1762586/1762612 co-relation queries the response was YES. [2024-06-21 16:14:42,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61454 conditions, 4952 events. 3008/4952 cut-off events. For 1762586/1762612 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30025 event pairs, 643 based on Foata normal form. 11/4923 useless extension candidates. Maximal degree in co-relation 61301. Up to 3978 conditions per place. [2024-06-21 16:14:42,392 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 319 selfloop transitions, 40 changer transitions 0/476 dead transitions. [2024-06-21 16:14:42,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 476 transitions, 4941 flow [2024-06-21 16:14:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:14:42,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-21 16:14:42,393 INFO L175 Difference]: Start difference. First operand has 332 places, 451 transitions, 4048 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:14:42,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 476 transitions, 4941 flow [2024-06-21 16:14:45,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 476 transitions, 4861 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 16:14:45,745 INFO L231 Difference]: Finished difference. Result has 335 places, 463 transitions, 4232 flow [2024-06-21 16:14:45,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3968, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4232, PETRI_PLACES=335, PETRI_TRANSITIONS=463} [2024-06-21 16:14:45,745 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 290 predicate places. [2024-06-21 16:14:45,745 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 463 transitions, 4232 flow [2024-06-21 16:14:45,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:45,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:45,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:45,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:14:45,746 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)] === [2024-06-21 16:14:45,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:45,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1831903199, now seen corresponding path program 4 times [2024-06-21 16:14:45,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:45,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124188173] [2024-06-21 16:14:45,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:45,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:46,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:46,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124188173] [2024-06-21 16:14:46,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124188173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:46,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:46,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:46,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259657827] [2024-06-21 16:14:46,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:46,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:46,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:46,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:46,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:46,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:14:46,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 463 transitions, 4232 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:46,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:46,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:14:46,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:48,017 INFO L124 PetriNetUnfolderBase]: 3186/5121 cut-off events. [2024-06-21 16:14:48,017 INFO L125 PetriNetUnfolderBase]: For 1784694/1784696 co-relation queries the response was YES. [2024-06-21 16:14:48,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63838 conditions, 5121 events. 3186/5121 cut-off events. For 1784694/1784696 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30009 event pairs, 655 based on Foata normal form. 3/5074 useless extension candidates. Maximal degree in co-relation 63682. Up to 4385 conditions per place. [2024-06-21 16:14:48,096 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 370 selfloop transitions, 44 changer transitions 0/478 dead transitions. [2024-06-21 16:14:48,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 478 transitions, 5204 flow [2024-06-21 16:14:48,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:14:48,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 16:14:48,097 INFO L175 Difference]: Start difference. First operand has 335 places, 463 transitions, 4232 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:14:48,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 478 transitions, 5204 flow [2024-06-21 16:14:50,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 478 transitions, 5091 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 16:14:50,884 INFO L231 Difference]: Finished difference. Result has 340 places, 466 transitions, 4327 flow [2024-06-21 16:14:50,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4119, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4327, PETRI_PLACES=340, PETRI_TRANSITIONS=466} [2024-06-21 16:14:50,885 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-21 16:14:50,885 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 466 transitions, 4327 flow [2024-06-21 16:14:50,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:50,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:50,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:50,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:14:50,885 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)] === [2024-06-21 16:14:50,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:50,885 INFO L85 PathProgramCache]: Analyzing trace with hash -276513313, now seen corresponding path program 1 times [2024-06-21 16:14:50,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:50,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869392905] [2024-06-21 16:14:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:50,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:51,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:51,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869392905] [2024-06-21 16:14:51,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869392905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:51,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:51,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:51,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144747448] [2024-06-21 16:14:51,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:51,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:51,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:51,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:51,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:51,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:14:51,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 466 transitions, 4327 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:51,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:51,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:14:51,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:53,224 INFO L124 PetriNetUnfolderBase]: 3253/5246 cut-off events. [2024-06-21 16:14:53,224 INFO L125 PetriNetUnfolderBase]: For 1791741/1791741 co-relation queries the response was YES. [2024-06-21 16:14:53,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63971 conditions, 5246 events. 3253/5246 cut-off events. For 1791741/1791741 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30903 event pairs, 619 based on Foata normal form. 1/5245 useless extension candidates. Maximal degree in co-relation 63813. Up to 4497 conditions per place. [2024-06-21 16:14:53,304 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 403 selfloop transitions, 17 changer transitions 0/489 dead transitions. [2024-06-21 16:14:53,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 489 transitions, 5315 flow [2024-06-21 16:14:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:53,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:14:53,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:14:53,305 INFO L175 Difference]: Start difference. First operand has 340 places, 466 transitions, 4327 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:14:53,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 489 transitions, 5315 flow [2024-06-21 16:14:56,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 489 transitions, 5129 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:56,011 INFO L231 Difference]: Finished difference. Result has 342 places, 469 transitions, 4275 flow [2024-06-21 16:14:56,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4141, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4275, PETRI_PLACES=342, PETRI_TRANSITIONS=469} [2024-06-21 16:14:56,012 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 297 predicate places. [2024-06-21 16:14:56,012 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 469 transitions, 4275 flow [2024-06-21 16:14:56,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:56,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:56,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:56,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:14:56,012 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)] === [2024-06-21 16:14:56,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1347442405, now seen corresponding path program 1 times [2024-06-21 16:14:56,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:56,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351741543] [2024-06-21 16:14:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:56,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:57,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:57,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351741543] [2024-06-21 16:14:57,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351741543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:57,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:57,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:57,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282964777] [2024-06-21 16:14:57,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:57,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:57,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:57,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:57,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:57,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:14:57,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 469 transitions, 4275 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:57,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:57,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:14:57,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:58,585 INFO L124 PetriNetUnfolderBase]: 3277/5282 cut-off events. [2024-06-21 16:14:58,585 INFO L125 PetriNetUnfolderBase]: For 1862028/1862033 co-relation queries the response was YES. [2024-06-21 16:14:58,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64681 conditions, 5282 events. 3277/5282 cut-off events. For 1862028/1862033 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 31152 event pairs, 618 based on Foata normal form. 6/5286 useless extension candidates. Maximal degree in co-relation 64522. Up to 4525 conditions per place. [2024-06-21 16:14:58,658 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 405 selfloop transitions, 18 changer transitions 0/492 dead transitions. [2024-06-21 16:14:58,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 492 transitions, 5257 flow [2024-06-21 16:14:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:58,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:14:58,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:14:58,659 INFO L175 Difference]: Start difference. First operand has 342 places, 469 transitions, 4275 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:14:58,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 492 transitions, 5257 flow [2024-06-21 16:15:01,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 492 transitions, 5145 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 16:15:01,431 INFO L231 Difference]: Finished difference. Result has 344 places, 473 transitions, 4288 flow [2024-06-21 16:15:01,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4163, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4288, PETRI_PLACES=344, PETRI_TRANSITIONS=473} [2024-06-21 16:15:01,431 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 299 predicate places. [2024-06-21 16:15:01,431 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 473 transitions, 4288 flow [2024-06-21 16:15:01,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:01,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:01,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:01,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:15:01,432 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)] === [2024-06-21 16:15:01,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1611643177, now seen corresponding path program 2 times [2024-06-21 16:15:01,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:01,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057115844] [2024-06-21 16:15:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:01,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:02,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:02,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057115844] [2024-06-21 16:15:02,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057115844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:02,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:02,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:02,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677061343] [2024-06-21 16:15:02,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:02,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:02,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:02,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:02,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:02,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:15:02,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 473 transitions, 4288 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:02,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:02,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:15:02,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:03,904 INFO L124 PetriNetUnfolderBase]: 3324/5351 cut-off events. [2024-06-21 16:15:03,904 INFO L125 PetriNetUnfolderBase]: For 1907547/1907552 co-relation queries the response was YES. [2024-06-21 16:15:03,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66722 conditions, 5351 events. 3324/5351 cut-off events. For 1907547/1907552 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 31584 event pairs, 621 based on Foata normal form. 8/5357 useless extension candidates. Maximal degree in co-relation 66562. Up to 4545 conditions per place. [2024-06-21 16:15:03,988 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 396 selfloop transitions, 34 changer transitions 0/499 dead transitions. [2024-06-21 16:15:03,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 499 transitions, 5601 flow [2024-06-21 16:15:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:03,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 16:15:03,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-21 16:15:03,989 INFO L175 Difference]: Start difference. First operand has 344 places, 473 transitions, 4288 flow. Second operand 8 states and 161 transitions. [2024-06-21 16:15:03,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 499 transitions, 5601 flow [2024-06-21 16:15:06,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 499 transitions, 5506 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 16:15:06,841 INFO L231 Difference]: Finished difference. Result has 347 places, 480 transitions, 4434 flow [2024-06-21 16:15:06,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4193, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4434, PETRI_PLACES=347, PETRI_TRANSITIONS=480} [2024-06-21 16:15:06,841 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-21 16:15:06,841 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 480 transitions, 4434 flow [2024-06-21 16:15:06,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:06,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:06,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:06,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:15:06,842 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)] === [2024-06-21 16:15:06,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash -271751527, now seen corresponding path program 3 times [2024-06-21 16:15:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:06,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020155730] [2024-06-21 16:15:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:06,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:08,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:08,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020155730] [2024-06-21 16:15:08,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020155730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:08,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:08,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:08,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906171390] [2024-06-21 16:15:08,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:08,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:08,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:08,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:08,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:08,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:15:08,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 480 transitions, 4434 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:08,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:08,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:15:08,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:09,401 INFO L124 PetriNetUnfolderBase]: 3306/5327 cut-off events. [2024-06-21 16:15:09,402 INFO L125 PetriNetUnfolderBase]: For 1924525/1924531 co-relation queries the response was YES. [2024-06-21 16:15:09,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66779 conditions, 5327 events. 3306/5327 cut-off events. For 1924525/1924531 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 31500 event pairs, 617 based on Foata normal form. 7/5332 useless extension candidates. Maximal degree in co-relation 66617. Up to 4557 conditions per place. [2024-06-21 16:15:09,486 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 405 selfloop transitions, 23 changer transitions 0/497 dead transitions. [2024-06-21 16:15:09,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 497 transitions, 5360 flow [2024-06-21 16:15:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:15:09,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:15:09,487 INFO L175 Difference]: Start difference. First operand has 347 places, 480 transitions, 4434 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:15:09,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 497 transitions, 5360 flow [2024-06-21 16:15:12,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 497 transitions, 5228 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-21 16:15:12,691 INFO L231 Difference]: Finished difference. Result has 351 places, 480 transitions, 4355 flow [2024-06-21 16:15:12,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4302, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4355, PETRI_PLACES=351, PETRI_TRANSITIONS=480} [2024-06-21 16:15:12,692 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 306 predicate places. [2024-06-21 16:15:12,692 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 480 transitions, 4355 flow [2024-06-21 16:15:12,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:12,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:12,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:12,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:15:12,692 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)] === [2024-06-21 16:15:12,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:12,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1847818537, now seen corresponding path program 4 times [2024-06-21 16:15:12,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:12,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699180323] [2024-06-21 16:15:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:12,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:13,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:13,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699180323] [2024-06-21 16:15:13,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699180323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:13,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:13,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:13,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802735578] [2024-06-21 16:15:13,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:13,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:13,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:13,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:13,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:14,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:15:14,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 480 transitions, 4355 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:14,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:14,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:15:14,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:15,301 INFO L124 PetriNetUnfolderBase]: 3322/5354 cut-off events. [2024-06-21 16:15:15,301 INFO L125 PetriNetUnfolderBase]: For 1938195/1938204 co-relation queries the response was YES. [2024-06-21 16:15:15,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67362 conditions, 5354 events. 3322/5354 cut-off events. For 1938195/1938204 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31648 event pairs, 626 based on Foata normal form. 3/5354 useless extension candidates. Maximal degree in co-relation 67198. Up to 4530 conditions per place. [2024-06-21 16:15:15,390 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 389 selfloop transitions, 50 changer transitions 0/508 dead transitions. [2024-06-21 16:15:15,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 508 transitions, 5728 flow [2024-06-21 16:15:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:15:15,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:15:15,391 INFO L175 Difference]: Start difference. First operand has 351 places, 480 transitions, 4355 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:15:15,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 508 transitions, 5728 flow [2024-06-21 16:15:18,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 508 transitions, 5642 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:15:18,650 INFO L231 Difference]: Finished difference. Result has 353 places, 495 transitions, 4630 flow [2024-06-21 16:15:18,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4286, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4630, PETRI_PLACES=353, PETRI_TRANSITIONS=495} [2024-06-21 16:15:18,651 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 308 predicate places. [2024-06-21 16:15:18,651 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 495 transitions, 4630 flow [2024-06-21 16:15:18,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:18,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:18,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:18,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:15:18,651 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)] === [2024-06-21 16:15:18,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:18,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1728933661, now seen corresponding path program 5 times [2024-06-21 16:15:18,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:18,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237724091] [2024-06-21 16:15:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:18,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:19,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:19,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237724091] [2024-06-21 16:15:19,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237724091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:19,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:19,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:19,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901422438] [2024-06-21 16:15:19,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:19,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:19,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:20,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:15:20,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 495 transitions, 4630 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:20,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:20,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:15:20,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:21,236 INFO L124 PetriNetUnfolderBase]: 3321/5355 cut-off events. [2024-06-21 16:15:21,237 INFO L125 PetriNetUnfolderBase]: For 1983546/1983555 co-relation queries the response was YES. [2024-06-21 16:15:21,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68346 conditions, 5355 events. 3321/5355 cut-off events. For 1983546/1983555 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 31742 event pairs, 625 based on Foata normal form. 6/5357 useless extension candidates. Maximal degree in co-relation 68180. Up to 4568 conditions per place. [2024-06-21 16:15:21,327 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 413 selfloop transitions, 33 changer transitions 0/515 dead transitions. [2024-06-21 16:15:21,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 515 transitions, 5747 flow [2024-06-21 16:15:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:15:21,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 16:15:21,328 INFO L175 Difference]: Start difference. First operand has 353 places, 495 transitions, 4630 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:15:21,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 515 transitions, 5747 flow [2024-06-21 16:15:24,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 515 transitions, 5650 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 16:15:24,469 INFO L231 Difference]: Finished difference. Result has 357 places, 501 transitions, 4775 flow [2024-06-21 16:15:24,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4537, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4775, PETRI_PLACES=357, PETRI_TRANSITIONS=501} [2024-06-21 16:15:24,470 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-21 16:15:24,470 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 501 transitions, 4775 flow [2024-06-21 16:15:24,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:24,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:24,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:24,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:15:24,470 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)] === [2024-06-21 16:15:24,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:24,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1170304375, now seen corresponding path program 6 times [2024-06-21 16:15:24,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:24,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699338786] [2024-06-21 16:15:24,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:24,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:25,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:25,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699338786] [2024-06-21 16:15:25,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699338786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:25,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:25,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:25,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651061212] [2024-06-21 16:15:25,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:25,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:25,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:25,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:25,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:25,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:15:25,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 501 transitions, 4775 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:25,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:25,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:15:25,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:27,190 INFO L124 PetriNetUnfolderBase]: 3322/5356 cut-off events. [2024-06-21 16:15:27,190 INFO L125 PetriNetUnfolderBase]: For 1974135/1974144 co-relation queries the response was YES. [2024-06-21 16:15:27,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68987 conditions, 5356 events. 3322/5356 cut-off events. For 1974135/1974144 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31643 event pairs, 624 based on Foata normal form. 2/5355 useless extension candidates. Maximal degree in co-relation 68819. Up to 4556 conditions per place. [2024-06-21 16:15:27,287 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 409 selfloop transitions, 42 changer transitions 0/520 dead transitions. [2024-06-21 16:15:27,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 520 transitions, 5849 flow [2024-06-21 16:15:27,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 16:15:27,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-21 16:15:27,289 INFO L175 Difference]: Start difference. First operand has 357 places, 501 transitions, 4775 flow. Second operand 8 states and 161 transitions. [2024-06-21 16:15:27,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 520 transitions, 5849 flow [2024-06-21 16:15:29,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 520 transitions, 5631 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-21 16:15:29,977 INFO L231 Difference]: Finished difference. Result has 359 places, 504 transitions, 4734 flow [2024-06-21 16:15:29,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4557, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4734, PETRI_PLACES=359, PETRI_TRANSITIONS=504} [2024-06-21 16:15:29,978 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-21 16:15:29,978 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 504 transitions, 4734 flow [2024-06-21 16:15:29,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:29,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:29,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:29,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:15:29,979 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)] === [2024-06-21 16:15:29,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:29,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1848126367, now seen corresponding path program 1 times [2024-06-21 16:15:29,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:29,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217081117] [2024-06-21 16:15:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:29,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:31,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:31,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217081117] [2024-06-21 16:15:31,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217081117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:31,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:31,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:15:31,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560121494] [2024-06-21 16:15:31,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:31,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:15:31,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:31,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:15:31,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:15:32,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:15:32,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 504 transitions, 4734 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:32,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:32,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:15:32,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:33,292 INFO L124 PetriNetUnfolderBase]: 3098/5079 cut-off events. [2024-06-21 16:15:33,292 INFO L125 PetriNetUnfolderBase]: For 1984734/1984742 co-relation queries the response was YES. [2024-06-21 16:15:33,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67679 conditions, 5079 events. 3098/5079 cut-off events. For 1984734/1984742 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30723 event pairs, 635 based on Foata normal form. 4/5036 useless extension candidates. Maximal degree in co-relation 67510. Up to 4151 conditions per place. [2024-06-21 16:15:33,377 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 383 selfloop transitions, 19 changer transitions 0/519 dead transitions. [2024-06-21 16:15:33,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 519 transitions, 5670 flow [2024-06-21 16:15:33,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:15:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:15:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 16:15:33,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 16:15:33,378 INFO L175 Difference]: Start difference. First operand has 359 places, 504 transitions, 4734 flow. Second operand 9 states and 174 transitions. [2024-06-21 16:15:33,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 519 transitions, 5670 flow [2024-06-21 16:15:36,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 519 transitions, 5507 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 16:15:36,464 INFO L231 Difference]: Finished difference. Result has 362 places, 506 transitions, 4716 flow [2024-06-21 16:15:36,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4571, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4716, PETRI_PLACES=362, PETRI_TRANSITIONS=506} [2024-06-21 16:15:36,465 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 317 predicate places. [2024-06-21 16:15:36,465 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 506 transitions, 4716 flow [2024-06-21 16:15:36,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:36,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:36,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:36,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:15:36,466 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:36,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:36,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1120623247, now seen corresponding path program 1 times [2024-06-21 16:15:36,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:36,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222628209] [2024-06-21 16:15:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:36,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:37,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:37,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222628209] [2024-06-21 16:15:37,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222628209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:37,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:37,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:15:37,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899325383] [2024-06-21 16:15:37,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:37,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:15:37,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:37,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:15:37,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:15:37,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:15:37,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 506 transitions, 4716 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:37,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:37,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:15:37,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:39,869 INFO L124 PetriNetUnfolderBase]: 3862/6017 cut-off events. [2024-06-21 16:15:39,869 INFO L125 PetriNetUnfolderBase]: For 2252342/2252346 co-relation queries the response was YES. [2024-06-21 16:15:39,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77808 conditions, 6017 events. 3862/6017 cut-off events. For 2252342/2252346 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34414 event pairs, 558 based on Foata normal form. 20/6035 useless extension candidates. Maximal degree in co-relation 77638. Up to 5277 conditions per place. [2024-06-21 16:15:39,959 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 532 selfloop transitions, 36 changer transitions 0/573 dead transitions. [2024-06-21 16:15:39,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 573 transitions, 6750 flow [2024-06-21 16:15:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:15:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:15:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-21 16:15:39,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:15:39,960 INFO L175 Difference]: Start difference. First operand has 362 places, 506 transitions, 4716 flow. Second operand 12 states and 240 transitions. [2024-06-21 16:15:39,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 573 transitions, 6750 flow [2024-06-21 16:15:43,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 573 transitions, 6619 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 16:15:43,930 INFO L231 Difference]: Finished difference. Result has 368 places, 508 transitions, 4821 flow [2024-06-21 16:15:43,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4821, PETRI_PLACES=368, PETRI_TRANSITIONS=508} [2024-06-21 16:15:43,931 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-21 16:15:43,931 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 508 transitions, 4821 flow [2024-06-21 16:15:43,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:43,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:43,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:43,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:15:43,931 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:43,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:43,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1711180209, now seen corresponding path program 2 times [2024-06-21 16:15:43,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:43,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210196815] [2024-06-21 16:15:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:43,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:45,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:45,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210196815] [2024-06-21 16:15:45,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210196815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:45,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:45,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:15:45,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625729611] [2024-06-21 16:15:45,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:45,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:15:45,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:45,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:15:45,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:15:45,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:15:45,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 508 transitions, 4821 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:45,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:45,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:15:45,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:47,312 INFO L124 PetriNetUnfolderBase]: 3912/6114 cut-off events. [2024-06-21 16:15:47,312 INFO L125 PetriNetUnfolderBase]: For 2280361/2280365 co-relation queries the response was YES. [2024-06-21 16:15:47,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78642 conditions, 6114 events. 3912/6114 cut-off events. For 2280361/2280365 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 35183 event pairs, 725 based on Foata normal form. 24/6136 useless extension candidates. Maximal degree in co-relation 78471. Up to 5582 conditions per place. [2024-06-21 16:15:47,405 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 527 selfloop transitions, 31 changer transitions 0/563 dead transitions. [2024-06-21 16:15:47,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 563 transitions, 6267 flow [2024-06-21 16:15:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:15:47,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:15:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-21 16:15:47,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2024-06-21 16:15:47,406 INFO L175 Difference]: Start difference. First operand has 368 places, 508 transitions, 4821 flow. Second operand 11 states and 216 transitions. [2024-06-21 16:15:47,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 563 transitions, 6267 flow [2024-06-21 16:15:51,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 563 transitions, 6146 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-21 16:15:51,115 INFO L231 Difference]: Finished difference. Result has 371 places, 509 transitions, 4851 flow [2024-06-21 16:15:51,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4708, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4851, PETRI_PLACES=371, PETRI_TRANSITIONS=509} [2024-06-21 16:15:51,116 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 326 predicate places. [2024-06-21 16:15:51,116 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 509 transitions, 4851 flow [2024-06-21 16:15:51,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:51,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:51,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:51,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:15:51,117 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:51,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:51,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1032057487, now seen corresponding path program 3 times [2024-06-21 16:15:51,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:51,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398178985] [2024-06-21 16:15:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:51,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:52,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:52,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398178985] [2024-06-21 16:15:52,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398178985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:52,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:52,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:15:52,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32140858] [2024-06-21 16:15:52,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:52,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:15:52,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:15:52,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:15:52,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:15:52,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 509 transitions, 4851 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:52,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:52,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:15:52,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:54,543 INFO L124 PetriNetUnfolderBase]: 3884/6070 cut-off events. [2024-06-21 16:15:54,544 INFO L125 PetriNetUnfolderBase]: For 2205381/2205385 co-relation queries the response was YES. [2024-06-21 16:15:54,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76191 conditions, 6070 events. 3884/6070 cut-off events. For 2205381/2205385 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34864 event pairs, 685 based on Foata normal form. 20/6088 useless extension candidates. Maximal degree in co-relation 76018. Up to 5428 conditions per place. [2024-06-21 16:15:54,635 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 529 selfloop transitions, 33 changer transitions 0/567 dead transitions. [2024-06-21 16:15:54,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 567 transitions, 6279 flow [2024-06-21 16:15:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:15:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:15:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-21 16:15:54,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:15:54,636 INFO L175 Difference]: Start difference. First operand has 371 places, 509 transitions, 4851 flow. Second operand 11 states and 220 transitions. [2024-06-21 16:15:54,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 567 transitions, 6279 flow [2024-06-21 16:15:58,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 567 transitions, 6124 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-21 16:15:58,185 INFO L231 Difference]: Finished difference. Result has 373 places, 509 transitions, 4768 flow [2024-06-21 16:15:58,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4696, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4768, PETRI_PLACES=373, PETRI_TRANSITIONS=509} [2024-06-21 16:15:58,185 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 328 predicate places. [2024-06-21 16:15:58,185 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 509 transitions, 4768 flow [2024-06-21 16:15:58,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:58,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:58,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:58,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:15:58,186 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:58,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1747488263, now seen corresponding path program 4 times [2024-06-21 16:15:58,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:58,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049416858] [2024-06-21 16:15:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:58,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:59,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:59,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049416858] [2024-06-21 16:15:59,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049416858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:59,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:59,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:15:59,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926271629] [2024-06-21 16:15:59,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:59,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:15:59,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:59,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:15:59,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:15:59,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:15:59,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 509 transitions, 4768 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:59,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:59,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:15:59,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:01,720 INFO L124 PetriNetUnfolderBase]: 3959/6195 cut-off events. [2024-06-21 16:16:01,720 INFO L125 PetriNetUnfolderBase]: For 2263029/2263036 co-relation queries the response was YES. [2024-06-21 16:16:01,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77015 conditions, 6195 events. 3959/6195 cut-off events. For 2263029/2263036 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 35887 event pairs, 675 based on Foata normal form. 24/6216 useless extension candidates. Maximal degree in co-relation 76841. Up to 4677 conditions per place. [2024-06-21 16:16:01,811 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 361 selfloop transitions, 196 changer transitions 0/562 dead transitions. [2024-06-21 16:16:01,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 562 transitions, 6236 flow [2024-06-21 16:16:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:16:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:16:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-21 16:16:01,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731404958677686 [2024-06-21 16:16:01,813 INFO L175 Difference]: Start difference. First operand has 373 places, 509 transitions, 4768 flow. Second operand 11 states and 229 transitions. [2024-06-21 16:16:01,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 562 transitions, 6236 flow [2024-06-21 16:16:05,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 562 transitions, 6151 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 16:16:05,083 INFO L231 Difference]: Finished difference. Result has 374 places, 510 transitions, 5164 flow [2024-06-21 16:16:05,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4683, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5164, PETRI_PLACES=374, PETRI_TRANSITIONS=510} [2024-06-21 16:16:05,083 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-21 16:16:05,083 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 510 transitions, 5164 flow [2024-06-21 16:16:05,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:05,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:05,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:05,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:16:05,084 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:05,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:05,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1752850643, now seen corresponding path program 5 times [2024-06-21 16:16:05,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:05,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235560933] [2024-06-21 16:16:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:05,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:06,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:06,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235560933] [2024-06-21 16:16:06,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235560933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:06,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:06,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:16:06,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057192525] [2024-06-21 16:16:06,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:06,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:16:06,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:06,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:16:06,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:16:06,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:16:06,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 510 transitions, 5164 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:06,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:06,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:16:06,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:08,507 INFO L124 PetriNetUnfolderBase]: 4034/6340 cut-off events. [2024-06-21 16:16:08,507 INFO L125 PetriNetUnfolderBase]: For 2313755/2313762 co-relation queries the response was YES. [2024-06-21 16:16:08,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79322 conditions, 6340 events. 4034/6340 cut-off events. For 2313755/2313762 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37129 event pairs, 709 based on Foata normal form. 24/6361 useless extension candidates. Maximal degree in co-relation 79147. Up to 4802 conditions per place. [2024-06-21 16:16:08,858 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 364 selfloop transitions, 195 changer transitions 0/564 dead transitions. [2024-06-21 16:16:08,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 564 transitions, 6658 flow [2024-06-21 16:16:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:16:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:16:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-21 16:16:08,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:16:08,859 INFO L175 Difference]: Start difference. First operand has 374 places, 510 transitions, 5164 flow. Second operand 11 states and 231 transitions. [2024-06-21 16:16:08,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 564 transitions, 6658 flow [2024-06-21 16:16:12,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 564 transitions, 6209 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-21 16:16:12,662 INFO L231 Difference]: Finished difference. Result has 376 places, 511 transitions, 5196 flow [2024-06-21 16:16:12,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5196, PETRI_PLACES=376, PETRI_TRANSITIONS=511} [2024-06-21 16:16:12,662 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 331 predicate places. [2024-06-21 16:16:12,662 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 511 transitions, 5196 flow [2024-06-21 16:16:12,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:12,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:12,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:12,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:16:12,663 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:12,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:12,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1752998513, now seen corresponding path program 6 times [2024-06-21 16:16:12,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:12,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629183846] [2024-06-21 16:16:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:12,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:13,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629183846] [2024-06-21 16:16:13,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629183846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:13,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:13,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:16:13,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468912907] [2024-06-21 16:16:13,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:13,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:16:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:16:13,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:16:14,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:16:14,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 511 transitions, 5196 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:14,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:14,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:16:14,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:16,055 INFO L124 PetriNetUnfolderBase]: 4092/6438 cut-off events. [2024-06-21 16:16:16,055 INFO L125 PetriNetUnfolderBase]: For 2324255/2324262 co-relation queries the response was YES. [2024-06-21 16:16:16,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80150 conditions, 6438 events. 4092/6438 cut-off events. For 2324255/2324262 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 37903 event pairs, 695 based on Foata normal form. 20/6455 useless extension candidates. Maximal degree in co-relation 79974. Up to 4670 conditions per place. [2024-06-21 16:16:16,162 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 365 selfloop transitions, 198 changer transitions 0/568 dead transitions. [2024-06-21 16:16:16,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 568 transitions, 6734 flow [2024-06-21 16:16:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:16:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:16:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-21 16:16:16,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48140495867768596 [2024-06-21 16:16:16,163 INFO L175 Difference]: Start difference. First operand has 376 places, 511 transitions, 5196 flow. Second operand 11 states and 233 transitions. [2024-06-21 16:16:16,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 568 transitions, 6734 flow [2024-06-21 16:16:20,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 568 transitions, 6285 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-21 16:16:20,051 INFO L231 Difference]: Finished difference. Result has 378 places, 512 transitions, 5235 flow [2024-06-21 16:16:20,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4747, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5235, PETRI_PLACES=378, PETRI_TRANSITIONS=512} [2024-06-21 16:16:20,051 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-21 16:16:20,051 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 512 transitions, 5235 flow [2024-06-21 16:16:20,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:20,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:20,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:20,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:16:20,052 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:20,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:20,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1747272782, now seen corresponding path program 1 times [2024-06-21 16:16:20,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:20,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343500898] [2024-06-21 16:16:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:20,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:21,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:21,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343500898] [2024-06-21 16:16:21,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343500898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:21,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:21,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:16:21,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831085877] [2024-06-21 16:16:21,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:21,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:16:21,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:21,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:16:21,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:16:21,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:16:21,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 512 transitions, 5235 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:21,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:21,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:16:21,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:23,340 INFO L124 PetriNetUnfolderBase]: 4109/6470 cut-off events. [2024-06-21 16:16:23,340 INFO L125 PetriNetUnfolderBase]: For 2279902/2279909 co-relation queries the response was YES. [2024-06-21 16:16:23,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80151 conditions, 6470 events. 4109/6470 cut-off events. For 2279902/2279909 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 38222 event pairs, 720 based on Foata normal form. 8/6475 useless extension candidates. Maximal degree in co-relation 79974. Up to 5409 conditions per place. [2024-06-21 16:16:23,449 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 404 selfloop transitions, 154 changer transitions 0/563 dead transitions. [2024-06-21 16:16:23,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 563 transitions, 6642 flow [2024-06-21 16:16:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:16:23,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:16:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-21 16:16:23,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-21 16:16:23,450 INFO L175 Difference]: Start difference. First operand has 378 places, 512 transitions, 5235 flow. Second operand 11 states and 221 transitions. [2024-06-21 16:16:23,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 563 transitions, 6642 flow [2024-06-21 16:16:27,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 563 transitions, 6174 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-21 16:16:27,597 INFO L231 Difference]: Finished difference. Result has 381 places, 517 transitions, 5221 flow [2024-06-21 16:16:27,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4771, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5221, PETRI_PLACES=381, PETRI_TRANSITIONS=517} [2024-06-21 16:16:27,597 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-21 16:16:27,597 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 517 transitions, 5221 flow [2024-06-21 16:16:27,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:27,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:27,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:27,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:16:27,598 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)] === [2024-06-21 16:16:27,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash 213926754, now seen corresponding path program 1 times [2024-06-21 16:16:27,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:27,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409098327] [2024-06-21 16:16:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:27,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:28,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:28,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409098327] [2024-06-21 16:16:28,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409098327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:28,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:28,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:16:28,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029955170] [2024-06-21 16:16:28,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:28,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:16:28,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:28,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:16:28,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:16:28,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:16:28,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 517 transitions, 5221 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:28,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:28,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:16:28,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:30,397 INFO L124 PetriNetUnfolderBase]: 3713/5989 cut-off events. [2024-06-21 16:16:30,397 INFO L125 PetriNetUnfolderBase]: For 2282533/2282549 co-relation queries the response was YES. [2024-06-21 16:16:30,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77214 conditions, 5989 events. 3713/5989 cut-off events. For 2282533/2282549 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 36393 event pairs, 686 based on Foata normal form. 8/5916 useless extension candidates. Maximal degree in co-relation 77035. Up to 5206 conditions per place. [2024-06-21 16:16:30,501 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 456 selfloop transitions, 29 changer transitions 0/551 dead transitions. [2024-06-21 16:16:30,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 551 transitions, 6387 flow [2024-06-21 16:16:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:16:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:16:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 16:16:30,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-21 16:16:30,502 INFO L175 Difference]: Start difference. First operand has 381 places, 517 transitions, 5221 flow. Second operand 9 states and 184 transitions. [2024-06-21 16:16:30,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 551 transitions, 6387 flow [2024-06-21 16:16:34,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 551 transitions, 5978 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-21 16:16:34,018 INFO L231 Difference]: Finished difference. Result has 382 places, 520 transitions, 4976 flow [2024-06-21 16:16:34,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4812, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4976, PETRI_PLACES=382, PETRI_TRANSITIONS=520} [2024-06-21 16:16:34,019 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 337 predicate places. [2024-06-21 16:16:34,019 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 520 transitions, 4976 flow [2024-06-21 16:16:34,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:34,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:34,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:34,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:16:34,019 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)] === [2024-06-21 16:16:34,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:34,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1180149213, now seen corresponding path program 1 times [2024-06-21 16:16:34,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:34,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817574843] [2024-06-21 16:16:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:34,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:34,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:34,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817574843] [2024-06-21 16:16:34,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817574843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:34,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:34,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:34,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549079308] [2024-06-21 16:16:34,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:34,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:34,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:34,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:34,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:16:34,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 520 transitions, 4976 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) [2024-06-21 16:16:34,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:34,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:16:34,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:36,580 INFO L124 PetriNetUnfolderBase]: 4124/6475 cut-off events. [2024-06-21 16:16:36,580 INFO L125 PetriNetUnfolderBase]: For 2315446/2315453 co-relation queries the response was YES. [2024-06-21 16:16:36,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80279 conditions, 6475 events. 4124/6475 cut-off events. For 2315446/2315453 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 38004 event pairs, 739 based on Foata normal form. 7/6479 useless extension candidates. Maximal degree in co-relation 80099. Up to 6015 conditions per place. [2024-06-21 16:16:36,692 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 484 selfloop transitions, 61 changer transitions 0/550 dead transitions. [2024-06-21 16:16:36,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 550 transitions, 6278 flow [2024-06-21 16:16:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:36,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:16:36,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:16:36,693 INFO L175 Difference]: Start difference. First operand has 382 places, 520 transitions, 4976 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:16:36,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 550 transitions, 6278 flow [2024-06-21 16:16:40,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 550 transitions, 6136 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 16:16:40,702 INFO L231 Difference]: Finished difference. Result has 383 places, 523 transitions, 5092 flow [2024-06-21 16:16:40,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5092, PETRI_PLACES=383, PETRI_TRANSITIONS=523} [2024-06-21 16:16:40,702 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-21 16:16:40,702 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 523 transitions, 5092 flow [2024-06-21 16:16:40,703 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) [2024-06-21 16:16:40,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:40,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:40,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:16:40,703 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)] === [2024-06-21 16:16:40,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:40,703 INFO L85 PathProgramCache]: Analyzing trace with hash 362917601, now seen corresponding path program 2 times [2024-06-21 16:16:40,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:40,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033870251] [2024-06-21 16:16:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:40,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:41,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:41,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033870251] [2024-06-21 16:16:41,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033870251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:41,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:41,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:41,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073057787] [2024-06-21 16:16:41,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:41,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:41,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:41,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:41,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:41,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:16:41,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 523 transitions, 5092 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) [2024-06-21 16:16:41,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:41,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:16:41,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:43,391 INFO L124 PetriNetUnfolderBase]: 4137/6494 cut-off events. [2024-06-21 16:16:43,391 INFO L125 PetriNetUnfolderBase]: For 2359158/2359165 co-relation queries the response was YES. [2024-06-21 16:16:43,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81270 conditions, 6494 events. 4137/6494 cut-off events. For 2359158/2359165 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 38172 event pairs, 729 based on Foata normal form. 7/6498 useless extension candidates. Maximal degree in co-relation 81089. Up to 6009 conditions per place. [2024-06-21 16:16:43,500 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 480 selfloop transitions, 68 changer transitions 0/553 dead transitions. [2024-06-21 16:16:43,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 553 transitions, 6794 flow [2024-06-21 16:16:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:16:43,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 16:16:43,501 INFO L175 Difference]: Start difference. First operand has 383 places, 523 transitions, 5092 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:16:43,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 553 transitions, 6794 flow [2024-06-21 16:16:47,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 553 transitions, 6562 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 16:16:47,612 INFO L231 Difference]: Finished difference. Result has 385 places, 529 transitions, 5264 flow [2024-06-21 16:16:47,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4860, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5264, PETRI_PLACES=385, PETRI_TRANSITIONS=529} [2024-06-21 16:16:47,612 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-21 16:16:47,612 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 529 transitions, 5264 flow [2024-06-21 16:16:47,612 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) [2024-06-21 16:16:47,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:47,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:47,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:16:47,613 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:47,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:47,613 INFO L85 PathProgramCache]: Analyzing trace with hash -713702995, now seen corresponding path program 7 times [2024-06-21 16:16:47,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:47,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48706389] [2024-06-21 16:16:47,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:47,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:48,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:48,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48706389] [2024-06-21 16:16:48,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48706389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:48,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:48,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:16:48,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535286978] [2024-06-21 16:16:48,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:48,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:16:48,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:48,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:16:48,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:16:48,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:16:48,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 529 transitions, 5264 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:48,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:48,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:16:48,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:51,089 INFO L124 PetriNetUnfolderBase]: 4212/6620 cut-off events. [2024-06-21 16:16:51,089 INFO L125 PetriNetUnfolderBase]: For 2540948/2540955 co-relation queries the response was YES. [2024-06-21 16:16:51,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83213 conditions, 6620 events. 4212/6620 cut-off events. For 2540948/2540955 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 39142 event pairs, 703 based on Foata normal form. 24/6641 useless extension candidates. Maximal degree in co-relation 83031. Up to 5091 conditions per place. [2024-06-21 16:16:51,198 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 399 selfloop transitions, 178 changer transitions 0/582 dead transitions. [2024-06-21 16:16:51,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 582 transitions, 6812 flow [2024-06-21 16:16:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:16:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:16:51,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-21 16:16:51,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4690082644628099 [2024-06-21 16:16:51,199 INFO L175 Difference]: Start difference. First operand has 385 places, 529 transitions, 5264 flow. Second operand 11 states and 227 transitions. [2024-06-21 16:16:51,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 582 transitions, 6812 flow [2024-06-21 16:16:55,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 582 transitions, 6603 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-21 16:16:55,546 INFO L231 Difference]: Finished difference. Result has 392 places, 530 transitions, 5508 flow [2024-06-21 16:16:55,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5508, PETRI_PLACES=392, PETRI_TRANSITIONS=530} [2024-06-21 16:16:55,546 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-21 16:16:55,547 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 530 transitions, 5508 flow [2024-06-21 16:16:55,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:55,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:55,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:55,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:16:55,547 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:55,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:55,547 INFO L85 PathProgramCache]: Analyzing trace with hash -913004785, now seen corresponding path program 8 times [2024-06-21 16:16:55,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:55,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333879839] [2024-06-21 16:16:55,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:55,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:56,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:56,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333879839] [2024-06-21 16:16:56,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333879839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:56,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:56,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:16:56,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433301010] [2024-06-21 16:16:56,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:56,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:16:56,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:56,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:16:56,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:16:56,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:16:56,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 530 transitions, 5508 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:56,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:56,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:16:56,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:59,134 INFO L124 PetriNetUnfolderBase]: 4287/6745 cut-off events. [2024-06-21 16:16:59,135 INFO L125 PetriNetUnfolderBase]: For 2598671/2598678 co-relation queries the response was YES. [2024-06-21 16:16:59,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85617 conditions, 6745 events. 4287/6745 cut-off events. For 2598671/2598678 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 40176 event pairs, 708 based on Foata normal form. 24/6766 useless extension candidates. Maximal degree in co-relation 85433. Up to 5216 conditions per place. [2024-06-21 16:16:59,253 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 403 selfloop transitions, 176 changer transitions 0/584 dead transitions. [2024-06-21 16:16:59,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 584 transitions, 7084 flow [2024-06-21 16:16:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:16:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:16:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-21 16:16:59,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731404958677686 [2024-06-21 16:16:59,254 INFO L175 Difference]: Start difference. First operand has 392 places, 530 transitions, 5508 flow. Second operand 11 states and 229 transitions. [2024-06-21 16:16:59,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 584 transitions, 7084 flow [2024-06-21 16:17:04,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 584 transitions, 6663 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-21 16:17:04,945 INFO L231 Difference]: Finished difference. Result has 394 places, 531 transitions, 5538 flow [2024-06-21 16:17:04,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5087, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5538, PETRI_PLACES=394, PETRI_TRANSITIONS=531} [2024-06-21 16:17:04,945 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-21 16:17:04,946 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 531 transitions, 5538 flow [2024-06-21 16:17:04,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:04,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:04,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:04,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:17:04,946 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:04,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:04,946 INFO L85 PathProgramCache]: Analyzing trace with hash -907642405, now seen corresponding path program 9 times [2024-06-21 16:17:04,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:04,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86915588] [2024-06-21 16:17:04,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:04,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:06,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:06,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86915588] [2024-06-21 16:17:06,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86915588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:06,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:06,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:17:06,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753298572] [2024-06-21 16:17:06,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:06,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:17:06,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:06,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:17:06,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:17:06,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:17:06,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 531 transitions, 5538 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:06,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:06,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:17:06,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:08,515 INFO L124 PetriNetUnfolderBase]: 4362/6880 cut-off events. [2024-06-21 16:17:08,515 INFO L125 PetriNetUnfolderBase]: For 2639251/2639258 co-relation queries the response was YES. [2024-06-21 16:17:08,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86790 conditions, 6880 events. 4362/6880 cut-off events. For 2639251/2639258 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 41303 event pairs, 732 based on Foata normal form. 24/6901 useless extension candidates. Maximal degree in co-relation 86605. Up to 5341 conditions per place. [2024-06-21 16:17:08,633 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 405 selfloop transitions, 175 changer transitions 0/585 dead transitions. [2024-06-21 16:17:08,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 585 transitions, 7118 flow [2024-06-21 16:17:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:17:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:17:08,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-21 16:17:08,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47520661157024796 [2024-06-21 16:17:08,634 INFO L175 Difference]: Start difference. First operand has 394 places, 531 transitions, 5538 flow. Second operand 11 states and 230 transitions. [2024-06-21 16:17:08,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 585 transitions, 7118 flow [2024-06-21 16:17:13,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 585 transitions, 6699 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-21 16:17:13,961 INFO L231 Difference]: Finished difference. Result has 396 places, 532 transitions, 5570 flow [2024-06-21 16:17:13,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5119, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5570, PETRI_PLACES=396, PETRI_TRANSITIONS=532} [2024-06-21 16:17:13,962 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 351 predicate places. [2024-06-21 16:17:13,962 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 532 transitions, 5570 flow [2024-06-21 16:17:13,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:13,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:13,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:13,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:17:13,963 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:13,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash -913152655, now seen corresponding path program 10 times [2024-06-21 16:17:13,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:13,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131150403] [2024-06-21 16:17:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:13,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:15,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:15,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131150403] [2024-06-21 16:17:15,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131150403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:15,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:15,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:17:15,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365874892] [2024-06-21 16:17:15,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:15,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:17:15,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:15,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:17:15,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:17:15,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:17:15,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 532 transitions, 5570 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:15,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:15,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:17:15,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:17,529 INFO L124 PetriNetUnfolderBase]: 4420/6983 cut-off events. [2024-06-21 16:17:17,529 INFO L125 PetriNetUnfolderBase]: For 2648522/2648529 co-relation queries the response was YES. [2024-06-21 16:17:17,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87609 conditions, 6983 events. 4420/6983 cut-off events. For 2648522/2648529 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42172 event pairs, 718 based on Foata normal form. 20/7000 useless extension candidates. Maximal degree in co-relation 87423. Up to 5089 conditions per place. [2024-06-21 16:17:17,652 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 404 selfloop transitions, 180 changer transitions 0/589 dead transitions. [2024-06-21 16:17:17,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 589 transitions, 7194 flow [2024-06-21 16:17:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:17:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:17:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-21 16:17:17,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:17:17,653 INFO L175 Difference]: Start difference. First operand has 396 places, 532 transitions, 5570 flow. Second operand 11 states and 231 transitions. [2024-06-21 16:17:17,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 589 transitions, 7194 flow [2024-06-21 16:17:23,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 589 transitions, 6775 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-21 16:17:23,344 INFO L231 Difference]: Finished difference. Result has 398 places, 533 transitions, 5613 flow [2024-06-21 16:17:23,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5151, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5613, PETRI_PLACES=398, PETRI_TRANSITIONS=533} [2024-06-21 16:17:23,345 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-21 16:17:23,345 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 533 transitions, 5613 flow [2024-06-21 16:17:23,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:23,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:23,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:23,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:17:23,345 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:23,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:23,346 INFO L85 PathProgramCache]: Analyzing trace with hash -907426924, now seen corresponding path program 2 times [2024-06-21 16:17:23,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:23,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024446648] [2024-06-21 16:17:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:23,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:24,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:24,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024446648] [2024-06-21 16:17:24,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024446648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:24,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:24,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:17:24,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344868318] [2024-06-21 16:17:24,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:24,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:17:24,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:24,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:17:24,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:17:24,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:17:24,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 533 transitions, 5613 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:24,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:24,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:17:24,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:26,874 INFO L124 PetriNetUnfolderBase]: 4437/7010 cut-off events. [2024-06-21 16:17:26,874 INFO L125 PetriNetUnfolderBase]: For 2589202/2589209 co-relation queries the response was YES. [2024-06-21 16:17:26,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87566 conditions, 7010 events. 4437/7010 cut-off events. For 2589202/2589209 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 42374 event pairs, 771 based on Foata normal form. 8/7015 useless extension candidates. Maximal degree in co-relation 87379. Up to 5948 conditions per place. [2024-06-21 16:17:26,999 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 444 selfloop transitions, 135 changer transitions 0/584 dead transitions. [2024-06-21 16:17:26,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 584 transitions, 7100 flow [2024-06-21 16:17:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:17:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:17:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-21 16:17:27,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-21 16:17:27,000 INFO L175 Difference]: Start difference. First operand has 398 places, 533 transitions, 5613 flow. Second operand 11 states and 221 transitions. [2024-06-21 16:17:27,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 584 transitions, 7100 flow [2024-06-21 16:17:32,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 584 transitions, 6658 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-21 16:17:32,312 INFO L231 Difference]: Finished difference. Result has 401 places, 538 transitions, 5601 flow [2024-06-21 16:17:32,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5175, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5601, PETRI_PLACES=401, PETRI_TRANSITIONS=538} [2024-06-21 16:17:32,313 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-21 16:17:32,313 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 538 transitions, 5601 flow [2024-06-21 16:17:32,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:32,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:32,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:32,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:17:32,314 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:32,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:32,314 INFO L85 PathProgramCache]: Analyzing trace with hash -713487514, now seen corresponding path program 3 times [2024-06-21 16:17:32,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:32,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651903434] [2024-06-21 16:17:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:32,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:33,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:33,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651903434] [2024-06-21 16:17:33,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651903434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:33,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:33,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:17:33,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153642249] [2024-06-21 16:17:33,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:33,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:17:33,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:33,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:17:33,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:17:33,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:17:33,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 538 transitions, 5601 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:33,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:33,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:17:33,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:35,827 INFO L124 PetriNetUnfolderBase]: 4465/7063 cut-off events. [2024-06-21 16:17:35,827 INFO L125 PetriNetUnfolderBase]: For 2616873/2616880 co-relation queries the response was YES. [2024-06-21 16:17:35,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87824 conditions, 7063 events. 4465/7063 cut-off events. For 2616873/2616880 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42863 event pairs, 781 based on Foata normal form. 8/7068 useless extension candidates. Maximal degree in co-relation 87635. Up to 5987 conditions per place. [2024-06-21 16:17:35,956 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 445 selfloop transitions, 139 changer transitions 0/589 dead transitions. [2024-06-21 16:17:35,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 589 transitions, 7092 flow [2024-06-21 16:17:35,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:17:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:17:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-21 16:17:35,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:17:35,958 INFO L175 Difference]: Start difference. First operand has 401 places, 538 transitions, 5601 flow. Second operand 11 states and 220 transitions. [2024-06-21 16:17:35,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 589 transitions, 7092 flow [2024-06-21 16:17:40,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 589 transitions, 6701 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-21 16:17:40,778 INFO L231 Difference]: Finished difference. Result has 405 places, 544 transitions, 5664 flow [2024-06-21 16:17:40,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5216, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5664, PETRI_PLACES=405, PETRI_TRANSITIONS=544} [2024-06-21 16:17:40,779 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 360 predicate places. [2024-06-21 16:17:40,779 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 544 transitions, 5664 flow [2024-06-21 16:17:40,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:40,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:40,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:40,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:17:40,780 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:40,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:40,780 INFO L85 PathProgramCache]: Analyzing trace with hash -706337674, now seen corresponding path program 4 times [2024-06-21 16:17:40,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:40,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982473485] [2024-06-21 16:17:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:40,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:42,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:42,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982473485] [2024-06-21 16:17:42,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982473485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:42,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:42,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:17:42,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708557645] [2024-06-21 16:17:42,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:42,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:17:42,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:42,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:17:42,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:17:42,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:17:42,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 544 transitions, 5664 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:42,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:42,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:17:42,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:44,735 INFO L124 PetriNetUnfolderBase]: 4482/7090 cut-off events. [2024-06-21 16:17:44,735 INFO L125 PetriNetUnfolderBase]: For 2657365/2657372 co-relation queries the response was YES. [2024-06-21 16:17:44,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88685 conditions, 7090 events. 4482/7090 cut-off events. For 2657365/2657372 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 43089 event pairs, 786 based on Foata normal form. 8/7095 useless extension candidates. Maximal degree in co-relation 88494. Up to 6014 conditions per place. [2024-06-21 16:17:44,867 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 445 selfloop transitions, 143 changer transitions 0/593 dead transitions. [2024-06-21 16:17:44,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 593 transitions, 7139 flow [2024-06-21 16:17:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:17:44,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:17:44,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 16:17:44,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524793388429752 [2024-06-21 16:17:44,869 INFO L175 Difference]: Start difference. First operand has 405 places, 544 transitions, 5664 flow. Second operand 11 states and 219 transitions. [2024-06-21 16:17:44,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 593 transitions, 7139 flow [2024-06-21 16:17:49,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 593 transitions, 6736 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-06-21 16:17:49,710 INFO L231 Difference]: Finished difference. Result has 408 places, 548 transitions, 5689 flow [2024-06-21 16:17:49,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5265, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5689, PETRI_PLACES=408, PETRI_TRANSITIONS=548} [2024-06-21 16:17:49,711 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 363 predicate places. [2024-06-21 16:17:49,711 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 548 transitions, 5689 flow [2024-06-21 16:17:49,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:49,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:49,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:49,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:17:49,711 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:49,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:49,712 INFO L85 PathProgramCache]: Analyzing trace with hash -706068904, now seen corresponding path program 5 times [2024-06-21 16:17:49,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:49,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877280087] [2024-06-21 16:17:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:49,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:51,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:51,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877280087] [2024-06-21 16:17:51,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877280087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:51,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:51,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:17:51,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641056659] [2024-06-21 16:17:51,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:51,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:17:51,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:51,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:17:51,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:17:51,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:17:51,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 548 transitions, 5689 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:51,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:51,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:17:51,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:53,343 INFO L124 PetriNetUnfolderBase]: 4499/7122 cut-off events. [2024-06-21 16:17:53,343 INFO L125 PetriNetUnfolderBase]: For 2697697/2697704 co-relation queries the response was YES. [2024-06-21 16:17:53,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89179 conditions, 7122 events. 4499/7122 cut-off events. For 2697697/2697704 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 43438 event pairs, 782 based on Foata normal form. 8/7127 useless extension candidates. Maximal degree in co-relation 88987. Up to 5946 conditions per place. [2024-06-21 16:17:53,466 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 439 selfloop transitions, 152 changer transitions 0/596 dead transitions. [2024-06-21 16:17:53,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 596 transitions, 7157 flow [2024-06-21 16:17:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:17:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:17:53,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-21 16:17:53,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:17:53,468 INFO L175 Difference]: Start difference. First operand has 408 places, 548 transitions, 5689 flow. Second operand 11 states and 220 transitions. [2024-06-21 16:17:53,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 596 transitions, 7157 flow [2024-06-21 16:17:59,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 596 transitions, 6786 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 16:17:59,111 INFO L231 Difference]: Finished difference. Result has 412 places, 550 transitions, 5749 flow [2024-06-21 16:17:59,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5318, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5749, PETRI_PLACES=412, PETRI_TRANSITIONS=550} [2024-06-21 16:17:59,111 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-21 16:17:59,111 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 550 transitions, 5749 flow [2024-06-21 16:17:59,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:59,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:59,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:59,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:17:59,112 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)] === [2024-06-21 16:17:59,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:59,113 INFO L85 PathProgramCache]: Analyzing trace with hash 480188350, now seen corresponding path program 2 times [2024-06-21 16:17:59,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:59,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290348730] [2024-06-21 16:17:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:59,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:00,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:00,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290348730] [2024-06-21 16:18:00,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290348730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:00,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:00,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:18:00,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518316254] [2024-06-21 16:18:00,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:00,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:18:00,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:00,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:18:00,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:18:00,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:18:00,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 550 transitions, 5749 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:00,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:00,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:18:00,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:02,250 INFO L124 PetriNetUnfolderBase]: 4104/6676 cut-off events. [2024-06-21 16:18:02,251 INFO L125 PetriNetUnfolderBase]: For 2750777/2750799 co-relation queries the response was YES. [2024-06-21 16:18:02,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87112 conditions, 6676 events. 4104/6676 cut-off events. For 2750777/2750799 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 42185 event pairs, 756 based on Foata normal form. 10/6605 useless extension candidates. Maximal degree in co-relation 86919. Up to 5786 conditions per place. [2024-06-21 16:18:02,375 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 467 selfloop transitions, 40 changer transitions 0/583 dead transitions. [2024-06-21 16:18:02,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 583 transitions, 7343 flow [2024-06-21 16:18:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:18:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:18:02,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 16:18:02,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-21 16:18:02,376 INFO L175 Difference]: Start difference. First operand has 412 places, 550 transitions, 5749 flow. Second operand 9 states and 182 transitions. [2024-06-21 16:18:02,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 583 transitions, 7343 flow [2024-06-21 16:18:08,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 583 transitions, 6930 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-21 16:18:08,552 INFO L231 Difference]: Finished difference. Result has 412 places, 556 transitions, 5628 flow [2024-06-21 16:18:08,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5336, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5628, PETRI_PLACES=412, PETRI_TRANSITIONS=556} [2024-06-21 16:18:08,552 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-21 16:18:08,553 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 556 transitions, 5628 flow [2024-06-21 16:18:08,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:08,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:08,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:08,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:18:08,553 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)] === [2024-06-21 16:18:08,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:08,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1186824381, now seen corresponding path program 1 times [2024-06-21 16:18:08,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:08,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941747204] [2024-06-21 16:18:08,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:08,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:10,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:10,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941747204] [2024-06-21 16:18:10,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941747204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:10,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:10,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:18:10,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131287307] [2024-06-21 16:18:10,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:10,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:18:10,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:10,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:18:10,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:18:10,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:18:10,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 556 transitions, 5628 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:10,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:10,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:18:10,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:12,054 INFO L124 PetriNetUnfolderBase]: 4113/6687 cut-off events. [2024-06-21 16:18:12,054 INFO L125 PetriNetUnfolderBase]: For 2778205/2778227 co-relation queries the response was YES. [2024-06-21 16:18:12,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87178 conditions, 6687 events. 4113/6687 cut-off events. For 2778205/2778227 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 42336 event pairs, 751 based on Foata normal form. 5/6611 useless extension candidates. Maximal degree in co-relation 86984. Up to 5844 conditions per place. [2024-06-21 16:18:12,178 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 481 selfloop transitions, 27 changer transitions 0/584 dead transitions. [2024-06-21 16:18:12,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 584 transitions, 6842 flow [2024-06-21 16:18:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:18:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:18:12,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 16:18:12,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-21 16:18:12,179 INFO L175 Difference]: Start difference. First operand has 412 places, 556 transitions, 5628 flow. Second operand 9 states and 178 transitions. [2024-06-21 16:18:12,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 584 transitions, 6842 flow [2024-06-21 16:18:17,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 584 transitions, 6701 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 16:18:17,154 INFO L231 Difference]: Finished difference. Result has 416 places, 559 transitions, 5669 flow [2024-06-21 16:18:17,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5487, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5669, PETRI_PLACES=416, PETRI_TRANSITIONS=559} [2024-06-21 16:18:17,154 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-21 16:18:17,154 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 559 transitions, 5669 flow [2024-06-21 16:18:17,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:17,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:17,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:17,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 16:18:17,155 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)] === [2024-06-21 16:18:17,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:17,156 INFO L85 PathProgramCache]: Analyzing trace with hash 362913044, now seen corresponding path program 3 times [2024-06-21 16:18:17,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:17,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327567816] [2024-06-21 16:18:17,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:17,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:18,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:18,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327567816] [2024-06-21 16:18:18,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327567816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:18,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:18,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:18:18,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114207620] [2024-06-21 16:18:18,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:18,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:18:18,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:18,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:18:18,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:18:18,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:18:18,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 559 transitions, 5669 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:18,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:18,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:18:18,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:20,292 INFO L124 PetriNetUnfolderBase]: 4109/6680 cut-off events. [2024-06-21 16:18:20,292 INFO L125 PetriNetUnfolderBase]: For 2798718/2798740 co-relation queries the response was YES. [2024-06-21 16:18:20,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87335 conditions, 6680 events. 4109/6680 cut-off events. For 2798718/2798740 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 42219 event pairs, 750 based on Foata normal form. 9/6609 useless extension candidates. Maximal degree in co-relation 87139. Up to 5806 conditions per place. [2024-06-21 16:18:20,412 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 477 selfloop transitions, 32 changer transitions 0/585 dead transitions. [2024-06-21 16:18:20,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 585 transitions, 6773 flow [2024-06-21 16:18:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:18:20,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:18:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 16:18:20,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:18:20,413 INFO L175 Difference]: Start difference. First operand has 416 places, 559 transitions, 5669 flow. Second operand 9 states and 180 transitions. [2024-06-21 16:18:20,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 585 transitions, 6773 flow [2024-06-21 16:18:24,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 585 transitions, 6543 flow, removed 90 selfloop flow, removed 7 redundant places. [2024-06-21 16:18:24,757 INFO L231 Difference]: Finished difference. Result has 418 places, 559 transitions, 5509 flow [2024-06-21 16:18:24,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5439, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5509, PETRI_PLACES=418, PETRI_TRANSITIONS=559} [2024-06-21 16:18:24,758 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 373 predicate places. [2024-06-21 16:18:24,758 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 559 transitions, 5509 flow [2024-06-21 16:18:24,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:24,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:24,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:24,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 16:18:24,758 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)] === [2024-06-21 16:18:24,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash 391092839, now seen corresponding path program 1 times [2024-06-21 16:18:24,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:24,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251728165] [2024-06-21 16:18:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:24,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:25,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:25,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251728165] [2024-06-21 16:18:25,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251728165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:25,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:25,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:25,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099868198] [2024-06-21 16:18:25,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:25,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:25,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:25,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:25,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:25,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:18:25,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 559 transitions, 5509 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) [2024-06-21 16:18:25,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:25,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:18:25,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:27,498 INFO L124 PetriNetUnfolderBase]: 4378/7019 cut-off events. [2024-06-21 16:18:27,498 INFO L125 PetriNetUnfolderBase]: For 2815253/2815260 co-relation queries the response was YES. [2024-06-21 16:18:27,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89210 conditions, 7019 events. 4378/7019 cut-off events. For 2815253/2815260 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 43591 event pairs, 802 based on Foata normal form. 6/7015 useless extension candidates. Maximal degree in co-relation 89013. Up to 6236 conditions per place. [2024-06-21 16:18:27,624 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 490 selfloop transitions, 36 changer transitions 0/588 dead transitions. [2024-06-21 16:18:27,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 588 transitions, 6787 flow [2024-06-21 16:18:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:27,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:18:27,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:18:27,626 INFO L175 Difference]: Start difference. First operand has 418 places, 559 transitions, 5509 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:18:27,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 588 transitions, 6787 flow [2024-06-21 16:18:33,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 588 transitions, 6701 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 16:18:33,883 INFO L231 Difference]: Finished difference. Result has 418 places, 562 transitions, 5623 flow [2024-06-21 16:18:33,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5423, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5623, PETRI_PLACES=418, PETRI_TRANSITIONS=562} [2024-06-21 16:18:33,884 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 373 predicate places. [2024-06-21 16:18:33,884 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 562 transitions, 5623 flow [2024-06-21 16:18:33,884 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) [2024-06-21 16:18:33,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:33,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:33,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:18:33,884 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)] === [2024-06-21 16:18:33,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:33,884 INFO L85 PathProgramCache]: Analyzing trace with hash 485506927, now seen corresponding path program 3 times [2024-06-21 16:18:33,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:33,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145708829] [2024-06-21 16:18:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:33,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:34,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:34,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145708829] [2024-06-21 16:18:34,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145708829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:34,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:34,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:34,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812411025] [2024-06-21 16:18:34,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:34,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:34,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:34,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:34,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:34,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:18:34,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 562 transitions, 5623 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) [2024-06-21 16:18:34,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:34,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:18:34,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:36,669 INFO L124 PetriNetUnfolderBase]: 4539/7187 cut-off events. [2024-06-21 16:18:36,669 INFO L125 PetriNetUnfolderBase]: For 2848047/2848050 co-relation queries the response was YES. [2024-06-21 16:18:36,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91448 conditions, 7187 events. 4539/7187 cut-off events. For 2848047/2848050 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 43878 event pairs, 805 based on Foata normal form. 3/7187 useless extension candidates. Maximal degree in co-relation 91250. Up to 6686 conditions per place. [2024-06-21 16:18:36,798 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 526 selfloop transitions, 58 changer transitions 0/589 dead transitions. [2024-06-21 16:18:36,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 589 transitions, 6981 flow [2024-06-21 16:18:36,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:18:36,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 16:18:36,799 INFO L175 Difference]: Start difference. First operand has 418 places, 562 transitions, 5623 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:18:36,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 589 transitions, 6981 flow [2024-06-21 16:18:42,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 589 transitions, 6829 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 16:18:42,121 INFO L231 Difference]: Finished difference. Result has 421 places, 565 transitions, 5713 flow [2024-06-21 16:18:42,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5713, PETRI_PLACES=421, PETRI_TRANSITIONS=565} [2024-06-21 16:18:42,121 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 376 predicate places. [2024-06-21 16:18:42,121 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 565 transitions, 5713 flow [2024-06-21 16:18:42,121 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) [2024-06-21 16:18:42,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:42,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:42,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:18:42,122 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)] === [2024-06-21 16:18:42,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:42,122 INFO L85 PathProgramCache]: Analyzing trace with hash 590544576, now seen corresponding path program 1 times [2024-06-21 16:18:42,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:42,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544455184] [2024-06-21 16:18:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:42,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:43,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:43,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544455184] [2024-06-21 16:18:43,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544455184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:43,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:43,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:43,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952071262] [2024-06-21 16:18:43,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:43,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:43,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:43,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:43,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:18:43,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 565 transitions, 5713 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) [2024-06-21 16:18:43,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:43,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:18:43,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:45,090 INFO L124 PetriNetUnfolderBase]: 4388/7033 cut-off events. [2024-06-21 16:18:45,090 INFO L125 PetriNetUnfolderBase]: For 2879994/2880001 co-relation queries the response was YES. [2024-06-21 16:18:45,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90277 conditions, 7033 events. 4388/7033 cut-off events. For 2879994/2880001 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 43717 event pairs, 811 based on Foata normal form. 7/7030 useless extension candidates. Maximal degree in co-relation 90078. Up to 6290 conditions per place. [2024-06-21 16:18:45,218 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 497 selfloop transitions, 30 changer transitions 0/590 dead transitions. [2024-06-21 16:18:45,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 590 transitions, 6949 flow [2024-06-21 16:18:45,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:18:45,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:18:45,219 INFO L175 Difference]: Start difference. First operand has 421 places, 565 transitions, 5713 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:18:45,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 590 transitions, 6949 flow [2024-06-21 16:18:50,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 590 transitions, 6739 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:50,610 INFO L231 Difference]: Finished difference. Result has 423 places, 568 transitions, 5683 flow [2024-06-21 16:18:50,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5683, PETRI_PLACES=423, PETRI_TRANSITIONS=568} [2024-06-21 16:18:50,611 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 378 predicate places. [2024-06-21 16:18:50,611 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 568 transitions, 5683 flow [2024-06-21 16:18:50,611 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) [2024-06-21 16:18:50,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:50,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:50,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:18:50,611 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)] === [2024-06-21 16:18:50,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:50,612 INFO L85 PathProgramCache]: Analyzing trace with hash 529129309, now seen corresponding path program 2 times [2024-06-21 16:18:50,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:50,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170688355] [2024-06-21 16:18:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:50,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:51,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:51,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170688355] [2024-06-21 16:18:51,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170688355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:51,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:51,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:51,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189147212] [2024-06-21 16:18:51,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:51,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:51,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:51,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:51,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:51,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:18:51,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 568 transitions, 5683 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) [2024-06-21 16:18:51,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:51,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:18:51,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:53,697 INFO L124 PetriNetUnfolderBase]: 4398/7049 cut-off events. [2024-06-21 16:18:53,697 INFO L125 PetriNetUnfolderBase]: For 2926270/2926277 co-relation queries the response was YES. [2024-06-21 16:18:53,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90941 conditions, 7049 events. 4398/7049 cut-off events. For 2926270/2926277 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43782 event pairs, 801 based on Foata normal form. 6/7045 useless extension candidates. Maximal degree in co-relation 90741. Up to 6251 conditions per place. [2024-06-21 16:18:53,825 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 492 selfloop transitions, 40 changer transitions 0/595 dead transitions. [2024-06-21 16:18:53,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 595 transitions, 6997 flow [2024-06-21 16:18:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:53,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:18:53,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:18:53,827 INFO L175 Difference]: Start difference. First operand has 423 places, 568 transitions, 5683 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:18:53,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 595 transitions, 6997 flow [2024-06-21 16:18:59,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 595 transitions, 6839 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:59,568 INFO L231 Difference]: Finished difference. Result has 425 places, 571 transitions, 5741 flow [2024-06-21 16:18:59,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5525, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5741, PETRI_PLACES=425, PETRI_TRANSITIONS=571} [2024-06-21 16:18:59,568 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-21 16:18:59,568 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 571 transitions, 5741 flow [2024-06-21 16:18:59,568 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) [2024-06-21 16:18:59,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:59,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:59,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:18:59,569 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)] === [2024-06-21 16:18:59,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:59,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1518127055, now seen corresponding path program 4 times [2024-06-21 16:18:59,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:59,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075078387] [2024-06-21 16:18:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:59,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:00,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:00,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075078387] [2024-06-21 16:19:00,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075078387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:00,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:00,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:00,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714786340] [2024-06-21 16:19:00,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:00,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:00,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:00,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:00,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:00,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:19:00,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 571 transitions, 5741 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) [2024-06-21 16:19:00,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:00,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:19:00,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:02,967 INFO L124 PetriNetUnfolderBase]: 4559/7217 cut-off events. [2024-06-21 16:19:02,967 INFO L125 PetriNetUnfolderBase]: For 2960523/2960526 co-relation queries the response was YES. [2024-06-21 16:19:03,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93165 conditions, 7217 events. 4559/7217 cut-off events. For 2960523/2960526 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44073 event pairs, 818 based on Foata normal form. 3/7217 useless extension candidates. Maximal degree in co-relation 92964. Up to 6699 conditions per place. [2024-06-21 16:19:03,083 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 524 selfloop transitions, 65 changer transitions 0/594 dead transitions. [2024-06-21 16:19:03,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 594 transitions, 7123 flow [2024-06-21 16:19:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:19:03,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-21 16:19:03,084 INFO L175 Difference]: Start difference. First operand has 425 places, 571 transitions, 5741 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:19:03,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 594 transitions, 7123 flow [2024-06-21 16:19:08,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 594 transitions, 6937 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:08,728 INFO L231 Difference]: Finished difference. Result has 427 places, 574 transitions, 5839 flow [2024-06-21 16:19:08,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5555, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5839, PETRI_PLACES=427, PETRI_TRANSITIONS=574} [2024-06-21 16:19:08,728 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 382 predicate places. [2024-06-21 16:19:08,728 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 574 transitions, 5839 flow [2024-06-21 16:19:08,728 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) [2024-06-21 16:19:08,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:08,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:08,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:19:08,729 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)] === [2024-06-21 16:19:08,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:08,729 INFO L85 PathProgramCache]: Analyzing trace with hash 735782501, now seen corresponding path program 5 times [2024-06-21 16:19:08,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:08,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228720389] [2024-06-21 16:19:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:08,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:09,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:09,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228720389] [2024-06-21 16:19:09,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228720389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:09,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:09,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:09,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832144431] [2024-06-21 16:19:09,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:09,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:09,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:09,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:09,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:09,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:19:09,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 574 transitions, 5839 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) [2024-06-21 16:19:09,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:09,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:19:09,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:12,349 INFO L124 PetriNetUnfolderBase]: 4580/7249 cut-off events. [2024-06-21 16:19:12,350 INFO L125 PetriNetUnfolderBase]: For 3023755/3023758 co-relation queries the response was YES. [2024-06-21 16:19:12,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94550 conditions, 7249 events. 4580/7249 cut-off events. For 3023755/3023758 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 44318 event pairs, 818 based on Foata normal form. 3/7249 useless extension candidates. Maximal degree in co-relation 94348. Up to 6683 conditions per place. [2024-06-21 16:19:12,485 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 507 selfloop transitions, 89 changer transitions 0/601 dead transitions. [2024-06-21 16:19:12,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 601 transitions, 8141 flow [2024-06-21 16:19:12,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:19:12,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-21 16:19:12,487 INFO L175 Difference]: Start difference. First operand has 427 places, 574 transitions, 5839 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:19:12,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 601 transitions, 8141 flow [2024-06-21 16:19:17,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 601 transitions, 7879 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:17,735 INFO L231 Difference]: Finished difference. Result has 429 places, 583 transitions, 6211 flow [2024-06-21 16:19:17,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6211, PETRI_PLACES=429, PETRI_TRANSITIONS=583} [2024-06-21 16:19:17,735 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 384 predicate places. [2024-06-21 16:19:17,735 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 583 transitions, 6211 flow [2024-06-21 16:19:17,736 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) [2024-06-21 16:19:17,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:17,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:17,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:19:17,736 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)] === [2024-06-21 16:19:17,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:17,737 INFO L85 PathProgramCache]: Analyzing trace with hash 597896226, now seen corresponding path program 2 times [2024-06-21 16:19:17,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:17,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047558505] [2024-06-21 16:19:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:17,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:18,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:18,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047558505] [2024-06-21 16:19:18,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047558505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:18,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:18,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:18,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899885543] [2024-06-21 16:19:18,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:18,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:18,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:18,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:18,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:19,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:19:19,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 583 transitions, 6211 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) [2024-06-21 16:19:19,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:19,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:19:19,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:21,503 INFO L124 PetriNetUnfolderBase]: 4429/7093 cut-off events. [2024-06-21 16:19:21,503 INFO L125 PetriNetUnfolderBase]: For 3058392/3058399 co-relation queries the response was YES. [2024-06-21 16:19:21,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93631 conditions, 7093 events. 4429/7093 cut-off events. For 3058392/3058399 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 44066 event pairs, 801 based on Foata normal form. 7/7090 useless extension candidates. Maximal degree in co-relation 93428. Up to 6324 conditions per place. [2024-06-21 16:19:21,637 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 499 selfloop transitions, 38 changer transitions 0/604 dead transitions. [2024-06-21 16:19:21,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 604 transitions, 7463 flow [2024-06-21 16:19:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:19:21,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 16:19:21,638 INFO L175 Difference]: Start difference. First operand has 429 places, 583 transitions, 6211 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:19:21,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 604 transitions, 7463 flow [2024-06-21 16:19:28,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 604 transitions, 7220 flow, removed 95 selfloop flow, removed 3 redundant places. [2024-06-21 16:19:28,042 INFO L231 Difference]: Finished difference. Result has 434 places, 586 transitions, 6176 flow [2024-06-21 16:19:28,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6176, PETRI_PLACES=434, PETRI_TRANSITIONS=586} [2024-06-21 16:19:28,043 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 389 predicate places. [2024-06-21 16:19:28,043 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 586 transitions, 6176 flow [2024-06-21 16:19:28,043 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) [2024-06-21 16:19:28,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:28,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:28,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 16:19:28,043 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)] === [2024-06-21 16:19:28,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:28,044 INFO L85 PathProgramCache]: Analyzing trace with hash 597896009, now seen corresponding path program 3 times [2024-06-21 16:19:28,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:28,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715030514] [2024-06-21 16:19:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:28,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:29,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:29,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715030514] [2024-06-21 16:19:29,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715030514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:29,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:29,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:29,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385448091] [2024-06-21 16:19:29,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:29,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:29,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:29,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:29,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:29,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:19:29,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 586 transitions, 6176 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) [2024-06-21 16:19:29,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:29,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:19:29,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:31,568 INFO L124 PetriNetUnfolderBase]: 4455/7133 cut-off events. [2024-06-21 16:19:31,568 INFO L125 PetriNetUnfolderBase]: For 3127420/3127427 co-relation queries the response was YES. [2024-06-21 16:19:31,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94844 conditions, 7133 events. 4455/7133 cut-off events. For 3127420/3127427 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 44409 event pairs, 820 based on Foata normal form. 6/7129 useless extension candidates. Maximal degree in co-relation 94639. Up to 6288 conditions per place. [2024-06-21 16:19:31,710 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 494 selfloop transitions, 52 changer transitions 0/613 dead transitions. [2024-06-21 16:19:31,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 613 transitions, 7960 flow [2024-06-21 16:19:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:19:31,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 16:19:31,711 INFO L175 Difference]: Start difference. First operand has 434 places, 586 transitions, 6176 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:19:31,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 613 transitions, 7960 flow [2024-06-21 16:19:36,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 613 transitions, 7776 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:36,726 INFO L231 Difference]: Finished difference. Result has 436 places, 592 transitions, 6376 flow [2024-06-21 16:19:36,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5992, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6376, PETRI_PLACES=436, PETRI_TRANSITIONS=592} [2024-06-21 16:19:36,726 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 391 predicate places. [2024-06-21 16:19:36,726 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 592 transitions, 6376 flow [2024-06-21 16:19:36,726 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) [2024-06-21 16:19:36,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:36,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:36,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 16:19:36,727 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)] === [2024-06-21 16:19:36,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:36,727 INFO L85 PathProgramCache]: Analyzing trace with hash 597716271, now seen corresponding path program 6 times [2024-06-21 16:19:36,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:36,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500198570] [2024-06-21 16:19:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:36,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:37,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:37,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500198570] [2024-06-21 16:19:37,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500198570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:37,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:37,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:37,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713570026] [2024-06-21 16:19:37,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:37,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:37,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:37,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:37,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:37,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:19:37,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 592 transitions, 6376 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) [2024-06-21 16:19:37,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:37,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:19:37,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:40,236 INFO L124 PetriNetUnfolderBase]: 4608/7292 cut-off events. [2024-06-21 16:19:40,236 INFO L125 PetriNetUnfolderBase]: For 3153630/3153633 co-relation queries the response was YES. [2024-06-21 16:19:40,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96752 conditions, 7292 events. 4608/7292 cut-off events. For 3153630/3153633 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 44616 event pairs, 833 based on Foata normal form. 3/7292 useless extension candidates. Maximal degree in co-relation 96546. Up to 6723 conditions per place. [2024-06-21 16:19:40,355 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 515 selfloop transitions, 90 changer transitions 0/610 dead transitions. [2024-06-21 16:19:40,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 610 transitions, 8264 flow [2024-06-21 16:19:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:19:40,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-21 16:19:40,356 INFO L175 Difference]: Start difference. First operand has 436 places, 592 transitions, 6376 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:19:40,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 610 transitions, 8264 flow [2024-06-21 16:19:47,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 610 transitions, 7984 flow, removed 121 selfloop flow, removed 4 redundant places. [2024-06-21 16:19:47,567 INFO L231 Difference]: Finished difference. Result has 440 places, 592 transitions, 6282 flow [2024-06-21 16:19:47,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6282, PETRI_PLACES=440, PETRI_TRANSITIONS=592} [2024-06-21 16:19:47,567 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 395 predicate places. [2024-06-21 16:19:47,567 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 592 transitions, 6282 flow [2024-06-21 16:19:47,567 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) [2024-06-21 16:19:47,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:47,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:47,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 16:19:47,567 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)] === [2024-06-21 16:19:47,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:47,568 INFO L85 PathProgramCache]: Analyzing trace with hash 598163136, now seen corresponding path program 3 times [2024-06-21 16:19:47,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:47,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277804578] [2024-06-21 16:19:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:47,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:48,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:48,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277804578] [2024-06-21 16:19:48,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277804578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:48,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:48,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:48,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272177409] [2024-06-21 16:19:48,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:48,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:48,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:48,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:48,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:19:48,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 592 transitions, 6282 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) [2024-06-21 16:19:48,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:48,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:19:48,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:51,111 INFO L124 PetriNetUnfolderBase]: 4465/7147 cut-off events. [2024-06-21 16:19:51,111 INFO L125 PetriNetUnfolderBase]: For 3195800/3195807 co-relation queries the response was YES. [2024-06-21 16:19:51,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95886 conditions, 7147 events. 4465/7147 cut-off events. For 3195800/3195807 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 44450 event pairs, 816 based on Foata normal form. 7/7144 useless extension candidates. Maximal degree in co-relation 95678. Up to 6362 conditions per place. [2024-06-21 16:19:51,237 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 501 selfloop transitions, 49 changer transitions 0/617 dead transitions. [2024-06-21 16:19:51,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 617 transitions, 8010 flow [2024-06-21 16:19:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:51,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:51,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:19:51,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:19:51,239 INFO L175 Difference]: Start difference. First operand has 440 places, 592 transitions, 6282 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:19:51,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 617 transitions, 8010 flow [2024-06-21 16:19:57,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 617 transitions, 7769 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:57,484 INFO L231 Difference]: Finished difference. Result has 441 places, 598 transitions, 6403 flow [2024-06-21 16:19:57,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6041, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6403, PETRI_PLACES=441, PETRI_TRANSITIONS=598} [2024-06-21 16:19:57,485 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 396 predicate places. [2024-06-21 16:19:57,485 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 598 transitions, 6403 flow [2024-06-21 16:19:57,485 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) [2024-06-21 16:19:57,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:57,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:57,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 16:19:57,485 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:57,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:57,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1566164079, now seen corresponding path program 11 times [2024-06-21 16:19:57,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:57,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126915009] [2024-06-21 16:19:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:57,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:58,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:58,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126915009] [2024-06-21 16:19:58,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126915009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:58,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:58,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:19:58,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720440625] [2024-06-21 16:19:58,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:58,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:19:58,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:19:58,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:19:58,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:19:58,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 598 transitions, 6403 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:58,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:58,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:19:58,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:01,876 INFO L124 PetriNetUnfolderBase]: 4696/7412 cut-off events. [2024-06-21 16:20:01,876 INFO L125 PetriNetUnfolderBase]: For 3430210/3430213 co-relation queries the response was YES. [2024-06-21 16:20:01,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99357 conditions, 7412 events. 4696/7412 cut-off events. For 3430210/3430213 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 45388 event pairs, 745 based on Foata normal form. 20/7429 useless extension candidates. Maximal degree in co-relation 99149. Up to 5849 conditions per place. [2024-06-21 16:20:02,001 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 468 selfloop transitions, 176 changer transitions 0/649 dead transitions. [2024-06-21 16:20:02,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 649 transitions, 8143 flow [2024-06-21 16:20:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-21 16:20:02,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4690082644628099 [2024-06-21 16:20:02,002 INFO L175 Difference]: Start difference. First operand has 441 places, 598 transitions, 6403 flow. Second operand 11 states and 227 transitions. [2024-06-21 16:20:02,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 649 transitions, 8143 flow [2024-06-21 16:20:08,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 649 transitions, 7952 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-21 16:20:08,209 INFO L231 Difference]: Finished difference. Result has 448 places, 599 transitions, 6677 flow [2024-06-21 16:20:08,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6212, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6677, PETRI_PLACES=448, PETRI_TRANSITIONS=599} [2024-06-21 16:20:08,210 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 403 predicate places. [2024-06-21 16:20:08,210 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 599 transitions, 6677 flow [2024-06-21 16:20:08,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:08,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:08,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:08,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 16:20:08,211 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:08,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1151723979, now seen corresponding path program 12 times [2024-06-21 16:20:08,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:08,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214317410] [2024-06-21 16:20:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:08,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:09,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:09,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214317410] [2024-06-21 16:20:09,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214317410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:09,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:09,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:20:09,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809498537] [2024-06-21 16:20:09,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:09,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:20:09,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:09,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:20:09,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:20:09,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:20:09,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 599 transitions, 6677 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:09,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:09,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:20:09,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:12,592 INFO L124 PetriNetUnfolderBase]: 4771/7542 cut-off events. [2024-06-21 16:20:12,592 INFO L125 PetriNetUnfolderBase]: For 3500841/3500844 co-relation queries the response was YES. [2024-06-21 16:20:12,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101991 conditions, 7542 events. 4771/7542 cut-off events. For 3500841/3500844 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 46395 event pairs, 774 based on Foata normal form. 20/7559 useless extension candidates. Maximal degree in co-relation 101781. Up to 5974 conditions per place. [2024-06-21 16:20:12,723 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 475 selfloop transitions, 171 changer transitions 0/651 dead transitions. [2024-06-21 16:20:12,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 651 transitions, 8449 flow [2024-06-21 16:20:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-21 16:20:12,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731404958677686 [2024-06-21 16:20:12,724 INFO L175 Difference]: Start difference. First operand has 448 places, 599 transitions, 6677 flow. Second operand 11 states and 229 transitions. [2024-06-21 16:20:12,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 651 transitions, 8449 flow [2024-06-21 16:20:21,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 651 transitions, 8016 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:21,125 INFO L231 Difference]: Finished difference. Result has 450 places, 600 transitions, 6701 flow [2024-06-21 16:20:21,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6244, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6701, PETRI_PLACES=450, PETRI_TRANSITIONS=600} [2024-06-21 16:20:21,125 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 405 predicate places. [2024-06-21 16:20:21,125 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 600 transitions, 6701 flow [2024-06-21 16:20:21,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:21,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:21,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:21,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 16:20:21,126 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:21,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:21,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1132472903, now seen corresponding path program 13 times [2024-06-21 16:20:21,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:21,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640235500] [2024-06-21 16:20:21,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:21,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:22,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:22,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640235500] [2024-06-21 16:20:22,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640235500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:22,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:22,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:20:22,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417888238] [2024-06-21 16:20:22,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:22,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:20:22,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:22,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:20:22,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:20:22,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:20:22,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 600 transitions, 6701 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:22,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:22,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:20:22,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:25,578 INFO L124 PetriNetUnfolderBase]: 4940/7821 cut-off events. [2024-06-21 16:20:25,578 INFO L125 PetriNetUnfolderBase]: For 3714928/3714931 co-relation queries the response was YES. [2024-06-21 16:20:25,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107948 conditions, 7821 events. 4940/7821 cut-off events. For 3714928/3714931 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 48598 event pairs, 783 based on Foata normal form. 16/7834 useless extension candidates. Maximal degree in co-relation 107737. Up to 5842 conditions per place. [2024-06-21 16:20:25,716 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 472 selfloop transitions, 180 changer transitions 0/657 dead transitions. [2024-06-21 16:20:25,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 657 transitions, 9133 flow [2024-06-21 16:20:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-21 16:20:25,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:20:25,717 INFO L175 Difference]: Start difference. First operand has 450 places, 600 transitions, 6701 flow. Second operand 11 states and 231 transitions. [2024-06-21 16:20:25,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 657 transitions, 9133 flow [2024-06-21 16:20:33,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 657 transitions, 8708 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:33,470 INFO L231 Difference]: Finished difference. Result has 452 places, 602 transitions, 6860 flow [2024-06-21 16:20:33,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6276, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6860, PETRI_PLACES=452, PETRI_TRANSITIONS=602} [2024-06-21 16:20:33,470 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 407 predicate places. [2024-06-21 16:20:33,470 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 602 transitions, 6860 flow [2024-06-21 16:20:33,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:33,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:33,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:33,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 16:20:33,471 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:33,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:33,471 INFO L85 PathProgramCache]: Analyzing trace with hash -567214373, now seen corresponding path program 14 times [2024-06-21 16:20:33,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:33,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021813529] [2024-06-21 16:20:33,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:33,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:34,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:34,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021813529] [2024-06-21 16:20:34,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021813529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:34,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:34,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:20:34,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133655698] [2024-06-21 16:20:34,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:34,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:20:34,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:34,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:20:34,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:20:34,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:20:34,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 602 transitions, 6860 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:34,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:34,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:20:34,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:38,018 INFO L124 PetriNetUnfolderBase]: 5015/7946 cut-off events. [2024-06-21 16:20:38,018 INFO L125 PetriNetUnfolderBase]: For 3804907/3804910 co-relation queries the response was YES. [2024-06-21 16:20:38,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109306 conditions, 7946 events. 5015/7946 cut-off events. For 3804907/3804910 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 49670 event pairs, 818 based on Foata normal form. 20/7963 useless extension candidates. Maximal degree in co-relation 109094. Up to 6378 conditions per place. [2024-06-21 16:20:38,160 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 466 selfloop transitions, 180 changer transitions 0/651 dead transitions. [2024-06-21 16:20:38,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 651 transitions, 8578 flow [2024-06-21 16:20:38,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-21 16:20:38,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2024-06-21 16:20:38,161 INFO L175 Difference]: Start difference. First operand has 452 places, 602 transitions, 6860 flow. Second operand 11 states and 225 transitions. [2024-06-21 16:20:38,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 651 transitions, 8578 flow [2024-06-21 16:20:46,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 651 transitions, 8260 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-21 16:20:46,458 INFO L231 Difference]: Finished difference. Result has 456 places, 603 transitions, 7021 flow [2024-06-21 16:20:46,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6554, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7021, PETRI_PLACES=456, PETRI_TRANSITIONS=603} [2024-06-21 16:20:46,459 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 411 predicate places. [2024-06-21 16:20:46,459 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 603 transitions, 7021 flow [2024-06-21 16:20:46,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:46,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:46,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:46,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 16:20:46,460 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:46,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:46,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1137983153, now seen corresponding path program 15 times [2024-06-21 16:20:46,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:46,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392682630] [2024-06-21 16:20:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:46,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:47,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:47,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392682630] [2024-06-21 16:20:47,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392682630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:47,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:47,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:20:47,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875313872] [2024-06-21 16:20:47,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:47,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:20:47,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:47,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:20:47,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:20:47,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 16:20:47,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 603 transitions, 7021 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:47,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:47,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 16:20:47,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:50,966 INFO L124 PetriNetUnfolderBase]: 4979/7895 cut-off events. [2024-06-21 16:20:50,966 INFO L125 PetriNetUnfolderBase]: For 3636169/3636172 co-relation queries the response was YES. [2024-06-21 16:20:51,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105826 conditions, 7895 events. 4979/7895 cut-off events. For 3636169/3636172 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 49341 event pairs, 800 based on Foata normal form. 20/7912 useless extension candidates. Maximal degree in co-relation 105612. Up to 6322 conditions per place. [2024-06-21 16:20:51,100 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 474 selfloop transitions, 174 changer transitions 0/653 dead transitions. [2024-06-21 16:20:51,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 653 transitions, 8665 flow [2024-06-21 16:20:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:51,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-21 16:20:51,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47107438016528924 [2024-06-21 16:20:51,101 INFO L175 Difference]: Start difference. First operand has 456 places, 603 transitions, 7021 flow. Second operand 11 states and 228 transitions. [2024-06-21 16:20:51,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 653 transitions, 8665 flow